Improve VPN setup
- Refactor VPN setup scripts into functions - Cleanup
This commit is contained in:
hwdsl2
parent
fc33e1c451
commit
9336c1c2c2
406
vpnsetup_amzn.sh
406
vpnsetup_amzn.sh
@ -46,139 +46,161 @@ check_ip() {
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printf '%s' "$1" | tr -d '\n' | grep -Eq "$IP_REGEX"
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}
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vpnsetup() {
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os_arch=$(uname -m | tr -dc 'A-Za-z0-9_-')
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if ! grep -qs "Amazon Linux release 2" /etc/system-release; then
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exiterr "This script only supports Amazon Linux 2."
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fi
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if [ "$(id -u)" != 0 ]; then
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check_root() {
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if [ "$(id -u)" != 0 ]; then
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exiterr "Script must be run as root. Try 'sudo sh $0'"
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fi
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fi
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}
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def_iface=$(route 2>/dev/null | grep -m 1 '^default' | grep -o '[^ ]*$')
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[ -z "$def_iface" ] && def_iface=$(ip -4 route list 0/0 2>/dev/null | grep -m 1 -Po '(?<=dev )(\S+)')
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def_state=$(cat "/sys/class/net/$def_iface/operstate" 2>/dev/null)
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if [ -n "$def_state" ] && [ "$def_state" != "down" ]; then
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check_os() {
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os_arch=$(uname -m | tr -dc 'A-Za-z0-9_-')
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if ! grep -qs "Amazon Linux release 2" /etc/system-release; then
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exiterr "This script only supports Amazon Linux 2."
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fi
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}
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check_iface() {
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def_iface=$(route 2>/dev/null | grep -m 1 '^default' | grep -o '[^ ]*$')
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[ -z "$def_iface" ] && def_iface=$(ip -4 route list 0/0 2>/dev/null | grep -m 1 -Po '(?<=dev )(\S+)')
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def_state=$(cat "/sys/class/net/$def_iface/operstate" 2>/dev/null)
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if [ -n "$def_state" ] && [ "$def_state" != "down" ]; then
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case $def_iface in
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wl*)
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exiterr "Wireless interface '$def_iface' detected. DO NOT run this script on your PC or Mac!"
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;;
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esac
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NET_IFACE="$def_iface"
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else
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else
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eth0_state=$(cat "/sys/class/net/eth0/operstate" 2>/dev/null)
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if [ -z "$eth0_state" ] || [ "$eth0_state" = "down" ]; then
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exiterr "Could not detect the default network interface."
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fi
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NET_IFACE=eth0
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fi
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fi
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}
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[ -n "$YOUR_IPSEC_PSK" ] && VPN_IPSEC_PSK="$YOUR_IPSEC_PSK"
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[ -n "$YOUR_USERNAME" ] && VPN_USER="$YOUR_USERNAME"
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[ -n "$YOUR_PASSWORD" ] && VPN_PASSWORD="$YOUR_PASSWORD"
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check_creds() {
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[ -n "$YOUR_IPSEC_PSK" ] && VPN_IPSEC_PSK="$YOUR_IPSEC_PSK"
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[ -n "$YOUR_USERNAME" ] && VPN_USER="$YOUR_USERNAME"
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[ -n "$YOUR_PASSWORD" ] && VPN_PASSWORD="$YOUR_PASSWORD"
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if [ -z "$VPN_IPSEC_PSK" ] && [ -z "$VPN_USER" ] && [ -z "$VPN_PASSWORD" ]; then
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if [ -z "$VPN_IPSEC_PSK" ] && [ -z "$VPN_USER" ] && [ -z "$VPN_PASSWORD" ]; then
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bigecho "VPN credentials not set by user. Generating random PSK and password..."
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VPN_IPSEC_PSK=$(LC_CTYPE=C tr -dc 'A-HJ-NPR-Za-km-z2-9' </dev/urandom 2>/dev/null | head -c 20)
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VPN_USER=vpnuser
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VPN_PASSWORD=$(LC_CTYPE=C tr -dc 'A-HJ-NPR-Za-km-z2-9' </dev/urandom 2>/dev/null | head -c 16)
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fi
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fi
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if [ -z "$VPN_IPSEC_PSK" ] || [ -z "$VPN_USER" ] || [ -z "$VPN_PASSWORD" ]; then
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if [ -z "$VPN_IPSEC_PSK" ] || [ -z "$VPN_USER" ] || [ -z "$VPN_PASSWORD" ]; then
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exiterr "All VPN credentials must be specified. Edit the script and re-enter them."
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fi
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fi
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if printf '%s' "$VPN_IPSEC_PSK $VPN_USER $VPN_PASSWORD" | LC_ALL=C grep -q '[^ -~]\+'; then
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if printf '%s' "$VPN_IPSEC_PSK $VPN_USER $VPN_PASSWORD" | LC_ALL=C grep -q '[^ -~]\+'; then
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exiterr "VPN credentials must not contain non-ASCII characters."
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fi
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fi
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case "$VPN_IPSEC_PSK $VPN_USER $VPN_PASSWORD" in
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case "$VPN_IPSEC_PSK $VPN_USER $VPN_PASSWORD" in
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*[\\\"\']*)
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exiterr "VPN credentials must not contain these special characters: \\ \" '"
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;;
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esac
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esac
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}
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if { [ -n "$VPN_DNS_SRV1" ] && ! check_ip "$VPN_DNS_SRV1"; } \
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check_dns() {
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if { [ -n "$VPN_DNS_SRV1" ] && ! check_ip "$VPN_DNS_SRV1"; } \
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|| { [ -n "$VPN_DNS_SRV2" ] && ! check_ip "$VPN_DNS_SRV2"; } then
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exiterr "The DNS server specified is invalid."
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fi
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fi
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}
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bigecho "VPN setup in progress... Please be patient."
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# shellcheck disable=SC2154,SC2039,SC3047
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start_setup() {
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bigecho "VPN setup in progress... Please be patient."
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trap 'dlo=$dl;dl=$LINENO' DEBUG 2>/dev/null
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trap 'finish $? $((dlo+1))' EXIT
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mkdir -p /opt/src
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cd /opt/src || exit 1
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}
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mkdir -p /opt/src
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cd /opt/src || exit 1
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bigecho "Installing packages required for setup..."
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(
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install_setup_pkgs() {
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bigecho "Installing packages required for setup..."
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(
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set -x
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yum -y -q install wget bind-utils openssl tar \
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iptables iproute gawk grep sed net-tools >/dev/null
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) || exiterr2
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) || exiterr2
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}
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bigecho "Trying to auto discover IP of this server..."
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detect_ip() {
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bigecho "Trying to auto discover IP of this server..."
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public_ip=${VPN_PUBLIC_IP:-''}
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check_ip "$public_ip" || public_ip=$(dig @resolver1.opendns.com -t A -4 myip.opendns.com +short)
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check_ip "$public_ip" || public_ip=$(wget -t 3 -T 15 -qO- http://ipv4.icanhazip.com)
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check_ip "$public_ip" || exiterr "Cannot detect this server's public IP. Define it as variable 'VPN_PUBLIC_IP' and re-run this script."
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}
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public_ip=${VPN_PUBLIC_IP:-''}
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check_ip "$public_ip" || public_ip=$(dig @resolver1.opendns.com -t A -4 myip.opendns.com +short)
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check_ip "$public_ip" || public_ip=$(wget -t 3 -T 15 -qO- http://ipv4.icanhazip.com)
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check_ip "$public_ip" || exiterr "Cannot detect this server's public IP. Define it as variable 'VPN_PUBLIC_IP' and re-run this script."
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bigecho "Adding the EPEL repository..."
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(
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add_epel_repo() {
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bigecho "Adding the EPEL repository..."
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(
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set -x
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amazon-linux-extras install epel -y >/dev/null
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) || exiterr2
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) || exiterr2
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}
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bigecho "Installing packages required for the VPN..."
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(
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install_vpn_pkgs_1() {
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bigecho "Installing packages required for the VPN..."
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(
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set -x
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yum -y -q install nss-devel nspr-devel pkgconfig pam-devel \
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libcap-ng-devel libselinux-devel curl-devel nss-tools \
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flex bison gcc make util-linux ppp \
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systemd-devel iptables-services \
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libevent-devel fipscheck-devel >/dev/null
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) || exiterr2
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(
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) || exiterr2
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}
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install_vpn_pkgs_2() {
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(
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set -x
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yum --enablerepo=epel -y -q install xl2tpd >/dev/null 2>&1
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) || exiterr2
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) || exiterr2
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}
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bigecho "Installing Fail2Ban to protect SSH..."
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(
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install_fail2ban() {
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bigecho "Installing Fail2Ban to protect SSH..."
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(
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set -x
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yum --enablerepo=epel -y -q install fail2ban >/dev/null
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) || exiterr2
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) || exiterr2
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}
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bigecho "Downloading IKEv2 script..."
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ikev2_url="https://github.com/hwdsl2/setup-ipsec-vpn/raw/master/extras/ikev2setup.sh"
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(
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get_ikev2_script() {
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bigecho "Downloading IKEv2 script..."
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ikev2_url="https://github.com/hwdsl2/setup-ipsec-vpn/raw/master/extras/ikev2setup.sh"
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(
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set -x
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wget -t 3 -T 30 -q -O ikev2.sh "$ikev2_url"
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) || /bin/rm -f ikev2.sh
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[ -s ikev2.sh ] && chmod +x ikev2.sh && ln -s /opt/src/ikev2.sh /usr/bin 2>/dev/null
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) || /bin/rm -f ikev2.sh
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[ -s ikev2.sh ] && chmod +x ikev2.sh && ln -s /opt/src/ikev2.sh /usr/bin 2>/dev/null
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}
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bigecho "Downloading Libreswan..."
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SWAN_VER=4.4
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swan_file="libreswan-$SWAN_VER.tar.gz"
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swan_url1="https://github.com/libreswan/libreswan/archive/v$SWAN_VER.tar.gz"
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swan_url2="https://download.libreswan.org/$swan_file"
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(
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get_libreswan() {
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bigecho "Downloading Libreswan..."
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SWAN_VER=4.4
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swan_file="libreswan-$SWAN_VER.tar.gz"
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swan_url1="https://github.com/libreswan/libreswan/archive/v$SWAN_VER.tar.gz"
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swan_url2="https://download.libreswan.org/$swan_file"
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(
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set -x
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wget -t 3 -T 30 -q -O "$swan_file" "$swan_url1" || wget -t 3 -T 30 -q -O "$swan_file" "$swan_url2"
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) || exit 1
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/bin/rm -rf "/opt/src/libreswan-$SWAN_VER"
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tar xzf "$swan_file" && /bin/rm -f "$swan_file"
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) || exit 1
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/bin/rm -rf "/opt/src/libreswan-$SWAN_VER"
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tar xzf "$swan_file" && /bin/rm -f "$swan_file"
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}
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bigecho "Compiling and installing Libreswan, please wait..."
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cd "libreswan-$SWAN_VER" || exit 1
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install_libreswan() {
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bigecho "Compiling and installing Libreswan, please wait..."
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cd "libreswan-$SWAN_VER" || exit 1
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cat > Makefile.inc.local <<'EOF'
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WERROR_CFLAGS=-w -s
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USE_DNSSEC=false
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@ -186,36 +208,38 @@ USE_DH2=true
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USE_NSS_KDF=false
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FINALNSSDIR=/etc/ipsec.d
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EOF
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if ! grep -qs IFLA_XFRM_LINK /usr/include/linux/if_link.h; then
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if ! grep -qs IFLA_XFRM_LINK /usr/include/linux/if_link.h; then
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echo "USE_XFRM_INTERFACE_IFLA_HEADER=true" >> Makefile.inc.local
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fi
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NPROCS=$(grep -c ^processor /proc/cpuinfo)
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[ -z "$NPROCS" ] && NPROCS=1
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(
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fi
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NPROCS=$(grep -c ^processor /proc/cpuinfo)
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[ -z "$NPROCS" ] && NPROCS=1
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(
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set -x
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make "-j$((NPROCS+1))" -s base >/dev/null && make -s install-base >/dev/null
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)
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)
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cd /opt/src || exit 1
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/bin/rm -rf "/opt/src/libreswan-$SWAN_VER"
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if ! /usr/local/sbin/ipsec --version 2>/dev/null | grep -qF "$SWAN_VER"; then
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cd /opt/src || exit 1
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/bin/rm -rf "/opt/src/libreswan-$SWAN_VER"
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if ! /usr/local/sbin/ipsec --version 2>/dev/null | grep -qF "$SWAN_VER"; then
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exiterr "Libreswan $SWAN_VER failed to build."
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fi
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fi
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}
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bigecho "Creating VPN configuration..."
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create_vpn_config() {
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bigecho "Creating VPN configuration..."
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L2TP_NET=${VPN_L2TP_NET:-'192.168.42.0/24'}
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L2TP_LOCAL=${VPN_L2TP_LOCAL:-'192.168.42.1'}
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L2TP_POOL=${VPN_L2TP_POOL:-'192.168.42.10-192.168.42.250'}
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XAUTH_NET=${VPN_XAUTH_NET:-'192.168.43.0/24'}
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XAUTH_POOL=${VPN_XAUTH_POOL:-'192.168.43.10-192.168.43.250'}
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DNS_SRV1=${VPN_DNS_SRV1:-'8.8.8.8'}
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DNS_SRV2=${VPN_DNS_SRV2:-'8.8.4.4'}
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DNS_SRVS="\"$DNS_SRV1 $DNS_SRV2\""
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[ -n "$VPN_DNS_SRV1" ] && [ -z "$VPN_DNS_SRV2" ] && DNS_SRVS="$DNS_SRV1"
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L2TP_NET=${VPN_L2TP_NET:-'192.168.42.0/24'}
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L2TP_LOCAL=${VPN_L2TP_LOCAL:-'192.168.42.1'}
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L2TP_POOL=${VPN_L2TP_POOL:-'192.168.42.10-192.168.42.250'}
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XAUTH_NET=${VPN_XAUTH_NET:-'192.168.43.0/24'}
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XAUTH_POOL=${VPN_XAUTH_POOL:-'192.168.43.10-192.168.43.250'}
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DNS_SRV1=${VPN_DNS_SRV1:-'8.8.8.8'}
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DNS_SRV2=${VPN_DNS_SRV2:-'8.8.4.4'}
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DNS_SRVS="\"$DNS_SRV1 $DNS_SRV2\""
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[ -n "$VPN_DNS_SRV1" ] && [ -z "$VPN_DNS_SRV2" ] && DNS_SRVS="$DNS_SRV1"
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# Create IPsec config
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conf_bk "/etc/ipsec.conf"
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# Create IPsec config
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conf_bk "/etc/ipsec.conf"
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cat > /etc/ipsec.conf <<EOF
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version 2.0
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@ -265,14 +289,14 @@ conn xauth-psk
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include /etc/ipsec.d/*.conf
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EOF
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# Specify IPsec PSK
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conf_bk "/etc/ipsec.secrets"
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# Specify IPsec PSK
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conf_bk "/etc/ipsec.secrets"
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cat > /etc/ipsec.secrets <<EOF
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%any %any : PSK "$VPN_IPSEC_PSK"
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EOF
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# Create xl2tpd config
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conf_bk "/etc/xl2tpd/xl2tpd.conf"
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# Create xl2tpd config
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conf_bk "/etc/xl2tpd/xl2tpd.conf"
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cat > /etc/xl2tpd/xl2tpd.conf <<EOF
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[global]
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port = 1701
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@ -288,8 +312,8 @@ pppoptfile = /etc/ppp/options.xl2tpd
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length bit = yes
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EOF
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# Set xl2tpd options
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conf_bk "/etc/ppp/options.xl2tpd"
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# Set xl2tpd options
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conf_bk "/etc/ppp/options.xl2tpd"
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cat > /etc/ppp/options.xl2tpd <<EOF
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+mschap-v2
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ipcp-accept-local
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@ -305,27 +329,42 @@ connect-delay 5000
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ms-dns $DNS_SRV1
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EOF
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if [ -z "$VPN_DNS_SRV1" ] || [ -n "$VPN_DNS_SRV2" ]; then
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if [ -z "$VPN_DNS_SRV1" ] || [ -n "$VPN_DNS_SRV2" ]; then
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cat >> /etc/ppp/options.xl2tpd <<EOF
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ms-dns $DNS_SRV2
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EOF
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fi
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fi
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# Create VPN credentials
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conf_bk "/etc/ppp/chap-secrets"
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# Create VPN credentials
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conf_bk "/etc/ppp/chap-secrets"
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cat > /etc/ppp/chap-secrets <<EOF
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"$VPN_USER" l2tpd "$VPN_PASSWORD" *
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EOF
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conf_bk "/etc/ipsec.d/passwd"
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VPN_PASSWORD_ENC=$(openssl passwd -1 "$VPN_PASSWORD")
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conf_bk "/etc/ipsec.d/passwd"
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VPN_PASSWORD_ENC=$(openssl passwd -1 "$VPN_PASSWORD")
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cat > /etc/ipsec.d/passwd <<EOF
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$VPN_USER:$VPN_PASSWORD_ENC:xauth-psk
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EOF
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}
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bigecho "Updating sysctl settings..."
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create_f2b_config() {
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F2B_FILE=/etc/fail2ban/jail.local
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if [ ! -f "$F2B_FILE" ]; then
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bigecho "Creating basic Fail2Ban rules..."
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cat > "$F2B_FILE" <<'EOF'
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[ssh-iptables]
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enabled = true
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filter = sshd
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logpath = /var/log/secure
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action = iptables[name=SSH, port=ssh, protocol=tcp]
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EOF
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fi
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}
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if ! grep -qs "hwdsl2 VPN script" /etc/sysctl.conf; then
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update_sysctl() {
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bigecho "Updating sysctl settings..."
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if ! grep -qs "hwdsl2 VPN script" /etc/sysctl.conf; then
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conf_bk "/etc/sysctl.conf"
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cat >> /etc/sysctl.conf <<EOF
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@ -348,33 +387,22 @@ net.core.rmem_max = 12582912
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net.ipv4.tcp_rmem = 10240 87380 12582912
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net.ipv4.tcp_wmem = 10240 87380 12582912
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EOF
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fi
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fi
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}
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F2B_FILE=/etc/fail2ban/jail.local
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if [ ! -f "$F2B_FILE" ]; then
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bigecho "Creating basic Fail2Ban rules..."
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cat > "$F2B_FILE" <<'EOF'
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[ssh-iptables]
|
||||
enabled = true
|
||||
filter = sshd
|
||||
logpath = /var/log/secure
|
||||
action = iptables[name=SSH, port=ssh, protocol=tcp]
|
||||
EOF
|
||||
fi
|
||||
|
||||
bigecho "Updating IPTables rules..."
|
||||
|
||||
IPT_FILE=/etc/sysconfig/iptables
|
||||
ipt_flag=0
|
||||
if ! grep -qs "hwdsl2 VPN script" "$IPT_FILE"; then
|
||||
update_iptables() {
|
||||
bigecho "Updating IPTables rules..."
|
||||
IPT_FILE=/etc/sysconfig/iptables
|
||||
ipt_flag=0
|
||||
if ! grep -qs "hwdsl2 VPN script" "$IPT_FILE"; then
|
||||
ipt_flag=1
|
||||
fi
|
||||
fi
|
||||
|
||||
ipi='iptables -I INPUT'
|
||||
ipf='iptables -I FORWARD'
|
||||
ipp='iptables -t nat -I POSTROUTING'
|
||||
res='RELATED,ESTABLISHED'
|
||||
if [ "$ipt_flag" = "1" ]; then
|
||||
ipi='iptables -I INPUT'
|
||||
ipf='iptables -I FORWARD'
|
||||
ipp='iptables -t nat -I POSTROUTING'
|
||||
res='RELATED,ESTABLISHED'
|
||||
if [ "$ipt_flag" = "1" ]; then
|
||||
service fail2ban stop >/dev/null 2>&1
|
||||
iptables-save > "$IPT_FILE.old-$SYS_DT"
|
||||
$ipi 1 -p udp --dport 1701 -m policy --dir in --pol none -j DROP
|
||||
@ -395,14 +423,15 @@ if [ "$ipt_flag" = "1" ]; then
|
||||
$ipp -s "$L2TP_NET" -o "$NET_IFACE" -j MASQUERADE
|
||||
echo "# Modified by hwdsl2 VPN script" > "$IPT_FILE"
|
||||
iptables-save >> "$IPT_FILE"
|
||||
fi
|
||||
fi
|
||||
}
|
||||
|
||||
bigecho "Enabling services on boot..."
|
||||
enable_on_boot() {
|
||||
bigecho "Enabling services on boot..."
|
||||
systemctl --now mask firewalld 2>/dev/null
|
||||
systemctl enable iptables fail2ban 2>/dev/null
|
||||
|
||||
systemctl --now mask firewalld 2>/dev/null
|
||||
systemctl enable iptables fail2ban 2>/dev/null
|
||||
|
||||
if ! grep -qs "hwdsl2 VPN script" /etc/rc.local; then
|
||||
if ! grep -qs "hwdsl2 VPN script" /etc/rc.local; then
|
||||
if [ -f /etc/rc.local ]; then
|
||||
conf_bk "/etc/rc.local"
|
||||
else
|
||||
@ -416,45 +445,35 @@ service ipsec restart
|
||||
service xl2tpd restart
|
||||
echo 1 > /proc/sys/net/ipv4/ip_forward)&
|
||||
EOF
|
||||
fi
|
||||
fi
|
||||
}
|
||||
|
||||
bigecho "Starting services..."
|
||||
start_services() {
|
||||
bigecho "Starting services..."
|
||||
sysctl -e -q -p
|
||||
|
||||
restorecon /etc/ipsec.d/*db 2>/dev/null
|
||||
restorecon /usr/local/sbin -Rv 2>/dev/null
|
||||
restorecon /usr/local/libexec/ipsec -Rv 2>/dev/null
|
||||
chmod +x /etc/rc.local
|
||||
chmod 600 /etc/ipsec.secrets* /etc/ppp/chap-secrets* /etc/ipsec.d/passwd*
|
||||
|
||||
sysctl -e -q -p
|
||||
restorecon /etc/ipsec.d/*db 2>/dev/null
|
||||
restorecon /usr/local/sbin -Rv 2>/dev/null
|
||||
restorecon /usr/local/libexec/ipsec -Rv 2>/dev/null
|
||||
|
||||
chmod +x /etc/rc.local
|
||||
chmod 600 /etc/ipsec.secrets* /etc/ppp/chap-secrets* /etc/ipsec.d/passwd*
|
||||
iptables-restore < "$IPT_FILE"
|
||||
|
||||
iptables-restore < "$IPT_FILE"
|
||||
|
||||
# Fix xl2tpd if l2tp_ppp is unavailable
|
||||
if ! modprobe -q l2tp_ppp; then
|
||||
# Fix xl2tpd if l2tp_ppp is unavailable
|
||||
if ! modprobe -q l2tp_ppp; then
|
||||
sed -i '/^ExecStartPre=\//s/=/=-/' /usr/lib/systemd/system/xl2tpd.service
|
||||
systemctl daemon-reload
|
||||
fi
|
||||
fi
|
||||
|
||||
mkdir -p /run/pluto
|
||||
service fail2ban restart 2>/dev/null
|
||||
service ipsec restart 2>/dev/null
|
||||
service xl2tpd restart 2>/dev/null
|
||||
|
||||
swan_ver_url="https://dl.ls20.com/v1/amzn/2/swanver?arch=$os_arch&ver=$SWAN_VER"
|
||||
swan_ver_latest=$(wget -t 3 -T 15 -qO- "$swan_ver_url")
|
||||
if printf '%s' "$swan_ver_latest" | grep -Eq '^([3-9]|[1-9][0-9]{1,2})(\.([0-9]|[1-9][0-9]{1,2})){1,2}$' \
|
||||
&& [ -n "$SWAN_VER" ] && [ "$SWAN_VER" != "$swan_ver_latest" ] \
|
||||
&& printf '%s\n%s' "$SWAN_VER" "$swan_ver_latest" | sort -C -V; then
|
||||
cat <<EOF
|
||||
|
||||
Note: A newer version of Libreswan ($swan_ver_latest) is available.
|
||||
To update, run:
|
||||
wget https://git.io/vpnupgrade -O vpnup.sh && sudo sh vpnup.sh
|
||||
EOF
|
||||
fi
|
||||
mkdir -p /run/pluto
|
||||
service fail2ban restart 2>/dev/null
|
||||
service ipsec restart 2>/dev/null
|
||||
service xl2tpd restart 2>/dev/null
|
||||
}
|
||||
|
||||
show_vpn_info() {
|
||||
cat <<EOF
|
||||
|
||||
================================================
|
||||
@ -477,7 +496,52 @@ IKEv2 guide: https://git.io/ikev2
|
||||
================================================
|
||||
|
||||
EOF
|
||||
}
|
||||
|
||||
check_swan_ver() {
|
||||
swan_ver_url="https://dl.ls20.com/v1/amzn/2/swanver?arch=$os_arch&ver=$SWAN_VER"
|
||||
[ "$1" != "0" ] && swan_ver_url="$swan_ver_url&e=$2"
|
||||
swan_ver_latest=$(wget -t 3 -T 15 -qO- "$swan_ver_url")
|
||||
if printf '%s' "$swan_ver_latest" | grep -Eq '^([3-9]|[1-9][0-9]{1,2})(\.([0-9]|[1-9][0-9]{1,2})){1,2}$' \
|
||||
&& [ "$1" = "0" ] && [ -n "$SWAN_VER" ] && [ "$SWAN_VER" != "$swan_ver_latest" ] \
|
||||
&& printf '%s\n%s' "$SWAN_VER" "$swan_ver_latest" | sort -C -V; then
|
||||
cat <<EOF
|
||||
Note: A newer version of Libreswan ($swan_ver_latest) is available.
|
||||
To update, run:
|
||||
wget https://git.io/vpnupgrade -O vpnup.sh && sudo sh vpnup.sh
|
||||
|
||||
EOF
|
||||
fi
|
||||
}
|
||||
|
||||
finish() {
|
||||
check_swan_ver "$1" "$2"
|
||||
exit "$1"
|
||||
}
|
||||
|
||||
vpnsetup() {
|
||||
check_root
|
||||
check_os
|
||||
check_iface
|
||||
check_creds
|
||||
check_dns
|
||||
start_setup
|
||||
install_setup_pkgs
|
||||
detect_ip
|
||||
add_epel_repo
|
||||
install_vpn_pkgs_1
|
||||
install_vpn_pkgs_2
|
||||
install_fail2ban
|
||||
get_ikev2_script
|
||||
get_libreswan
|
||||
install_libreswan
|
||||
create_vpn_config
|
||||
create_f2b_config
|
||||
update_sysctl
|
||||
update_iptables
|
||||
enable_on_boot
|
||||
start_services
|
||||
show_vpn_info
|
||||
}
|
||||
|
||||
## Defer setup until we have the complete script
|
||||
|
||||
@ -47,140 +47,162 @@ check_ip() {
|
||||
printf '%s' "$1" | tr -d '\n' | grep -Eq "$IP_REGEX"
|
||||
}
|
||||
|
||||
vpnsetup() {
|
||||
check_root() {
|
||||
if [ "$(id -u)" != 0 ]; then
|
||||
exiterr "Script must be run as root. Try 'sudo sh $0'"
|
||||
fi
|
||||
}
|
||||
|
||||
os_type=centos
|
||||
os_arch=$(uname -m | tr -dc 'A-Za-z0-9_-')
|
||||
rh_file="/etc/redhat-release"
|
||||
if grep -qs "Red Hat" "$rh_file"; then
|
||||
check_vz() {
|
||||
if [ -f /proc/user_beancounters ]; then
|
||||
exiterr "OpenVZ VPS is not supported."
|
||||
fi
|
||||
}
|
||||
|
||||
check_os() {
|
||||
os_type=centos
|
||||
os_arch=$(uname -m | tr -dc 'A-Za-z0-9_-')
|
||||
rh_file="/etc/redhat-release"
|
||||
if grep -qs "Red Hat" "$rh_file"; then
|
||||
os_type=rhel
|
||||
fi
|
||||
if grep -qs "release 7" "$rh_file"; then
|
||||
fi
|
||||
if grep -qs "release 7" "$rh_file"; then
|
||||
os_ver=7
|
||||
elif grep -qs "release 8" "$rh_file"; then
|
||||
elif grep -qs "release 8" "$rh_file"; then
|
||||
os_ver=8
|
||||
grep -qi stream "$rh_file" && os_ver=8s
|
||||
grep -qi rocky "$rh_file" && os_type=rocky
|
||||
grep -qi alma "$rh_file" && os_type=alma
|
||||
else
|
||||
else
|
||||
exiterr "This script only supports CentOS/RHEL 7 and 8."
|
||||
fi
|
||||
fi
|
||||
}
|
||||
|
||||
if [ -f /proc/user_beancounters ]; then
|
||||
exiterr "OpenVZ VPS is not supported."
|
||||
fi
|
||||
|
||||
if [ "$(id -u)" != 0 ]; then
|
||||
exiterr "Script must be run as root. Try 'sudo sh $0'"
|
||||
fi
|
||||
|
||||
def_iface=$(route 2>/dev/null | grep -m 1 '^default' | grep -o '[^ ]*$')
|
||||
[ -z "$def_iface" ] && def_iface=$(ip -4 route list 0/0 2>/dev/null | grep -m 1 -Po '(?<=dev )(\S+)')
|
||||
def_state=$(cat "/sys/class/net/$def_iface/operstate" 2>/dev/null)
|
||||
if [ -n "$def_state" ] && [ "$def_state" != "down" ]; then
|
||||
check_iface() {
|
||||
def_iface=$(route 2>/dev/null | grep -m 1 '^default' | grep -o '[^ ]*$')
|
||||
[ -z "$def_iface" ] && def_iface=$(ip -4 route list 0/0 2>/dev/null | grep -m 1 -Po '(?<=dev )(\S+)')
|
||||
def_state=$(cat "/sys/class/net/$def_iface/operstate" 2>/dev/null)
|
||||
if [ -n "$def_state" ] && [ "$def_state" != "down" ]; then
|
||||
case $def_iface in
|
||||
wl*)
|
||||
exiterr "Wireless interface '$def_iface' detected. DO NOT run this script on your PC or Mac!"
|
||||
;;
|
||||
esac
|
||||
NET_IFACE="$def_iface"
|
||||
else
|
||||
else
|
||||
eth0_state=$(cat "/sys/class/net/eth0/operstate" 2>/dev/null)
|
||||
if [ -z "$eth0_state" ] || [ "$eth0_state" = "down" ]; then
|
||||
exiterr "Could not detect the default network interface."
|
||||
fi
|
||||
NET_IFACE=eth0
|
||||
fi
|
||||
fi
|
||||
}
|
||||
|
||||
[ -n "$YOUR_IPSEC_PSK" ] && VPN_IPSEC_PSK="$YOUR_IPSEC_PSK"
|
||||
[ -n "$YOUR_USERNAME" ] && VPN_USER="$YOUR_USERNAME"
|
||||
[ -n "$YOUR_PASSWORD" ] && VPN_PASSWORD="$YOUR_PASSWORD"
|
||||
check_creds() {
|
||||
[ -n "$YOUR_IPSEC_PSK" ] && VPN_IPSEC_PSK="$YOUR_IPSEC_PSK"
|
||||
[ -n "$YOUR_USERNAME" ] && VPN_USER="$YOUR_USERNAME"
|
||||
[ -n "$YOUR_PASSWORD" ] && VPN_PASSWORD="$YOUR_PASSWORD"
|
||||
|
||||
if [ -z "$VPN_IPSEC_PSK" ] && [ -z "$VPN_USER" ] && [ -z "$VPN_PASSWORD" ]; then
|
||||
if [ -z "$VPN_IPSEC_PSK" ] && [ -z "$VPN_USER" ] && [ -z "$VPN_PASSWORD" ]; then
|
||||
bigecho "VPN credentials not set by user. Generating random PSK and password..."
|
||||
VPN_IPSEC_PSK=$(LC_CTYPE=C tr -dc 'A-HJ-NPR-Za-km-z2-9' </dev/urandom 2>/dev/null | head -c 20)
|
||||
VPN_USER=vpnuser
|
||||
VPN_PASSWORD=$(LC_CTYPE=C tr -dc 'A-HJ-NPR-Za-km-z2-9' </dev/urandom 2>/dev/null | head -c 16)
|
||||
fi
|
||||
fi
|
||||
|
||||
if [ -z "$VPN_IPSEC_PSK" ] || [ -z "$VPN_USER" ] || [ -z "$VPN_PASSWORD" ]; then
|
||||
if [ -z "$VPN_IPSEC_PSK" ] || [ -z "$VPN_USER" ] || [ -z "$VPN_PASSWORD" ]; then
|
||||
exiterr "All VPN credentials must be specified. Edit the script and re-enter them."
|
||||
fi
|
||||
fi
|
||||
|
||||
if printf '%s' "$VPN_IPSEC_PSK $VPN_USER $VPN_PASSWORD" | LC_ALL=C grep -q '[^ -~]\+'; then
|
||||
if printf '%s' "$VPN_IPSEC_PSK $VPN_USER $VPN_PASSWORD" | LC_ALL=C grep -q '[^ -~]\+'; then
|
||||
exiterr "VPN credentials must not contain non-ASCII characters."
|
||||
fi
|
||||
fi
|
||||
|
||||
case "$VPN_IPSEC_PSK $VPN_USER $VPN_PASSWORD" in
|
||||
case "$VPN_IPSEC_PSK $VPN_USER $VPN_PASSWORD" in
|
||||
*[\\\"\']*)
|
||||
exiterr "VPN credentials must not contain these special characters: \\ \" '"
|
||||
;;
|
||||
esac
|
||||
esac
|
||||
}
|
||||
|
||||
if { [ -n "$VPN_DNS_SRV1" ] && ! check_ip "$VPN_DNS_SRV1"; } \
|
||||
check_dns() {
|
||||
if { [ -n "$VPN_DNS_SRV1" ] && ! check_ip "$VPN_DNS_SRV1"; } \
|
||||
|| { [ -n "$VPN_DNS_SRV2" ] && ! check_ip "$VPN_DNS_SRV2"; } then
|
||||
exiterr "The DNS server specified is invalid."
|
||||
fi
|
||||
fi
|
||||
}
|
||||
|
||||
bigecho "VPN setup in progress... Please be patient."
|
||||
# shellcheck disable=SC2154,SC2039,SC3047
|
||||
start_setup() {
|
||||
bigecho "VPN setup in progress... Please be patient."
|
||||
trap 'dlo=$dl;dl=$LINENO' DEBUG 2>/dev/null
|
||||
trap 'finish $? $((dlo+1))' EXIT
|
||||
mkdir -p /opt/src
|
||||
cd /opt/src || exit 1
|
||||
}
|
||||
|
||||
mkdir -p /opt/src
|
||||
cd /opt/src || exit 1
|
||||
|
||||
bigecho "Installing packages required for setup..."
|
||||
|
||||
(
|
||||
install_setup_pkgs() {
|
||||
bigecho "Installing packages required for setup..."
|
||||
(
|
||||
set -x
|
||||
yum -y -q install wget bind-utils openssl tar \
|
||||
iptables iproute gawk grep sed net-tools >/dev/null
|
||||
) || exiterr2
|
||||
) || exiterr2
|
||||
}
|
||||
|
||||
bigecho "Trying to auto discover IP of this server..."
|
||||
detect_ip() {
|
||||
bigecho "Trying to auto discover IP of this server..."
|
||||
public_ip=${VPN_PUBLIC_IP:-''}
|
||||
check_ip "$public_ip" || public_ip=$(dig @resolver1.opendns.com -t A -4 myip.opendns.com +short)
|
||||
check_ip "$public_ip" || public_ip=$(wget -t 3 -T 15 -qO- http://ipv4.icanhazip.com)
|
||||
check_ip "$public_ip" || exiterr "Cannot detect this server's public IP. Define it as variable 'VPN_PUBLIC_IP' and re-run this script."
|
||||
}
|
||||
|
||||
public_ip=${VPN_PUBLIC_IP:-''}
|
||||
check_ip "$public_ip" || public_ip=$(dig @resolver1.opendns.com -t A -4 myip.opendns.com +short)
|
||||
check_ip "$public_ip" || public_ip=$(wget -t 3 -T 15 -qO- http://ipv4.icanhazip.com)
|
||||
check_ip "$public_ip" || exiterr "Cannot detect this server's public IP. Define it as variable 'VPN_PUBLIC_IP' and re-run this script."
|
||||
|
||||
bigecho "Adding the EPEL repository..."
|
||||
|
||||
epel_url="https://dl.fedoraproject.org/pub/epel/epel-release-latest-$(rpm -E '%{rhel}').noarch.rpm"
|
||||
(
|
||||
add_epel_repo() {
|
||||
bigecho "Adding the EPEL repository..."
|
||||
epel_url="https://dl.fedoraproject.org/pub/epel/epel-release-latest-$(rpm -E '%{rhel}').noarch.rpm"
|
||||
(
|
||||
set -x
|
||||
yum -y -q install epel-release >/dev/null 2>&1 || yum -y -q install "$epel_url" >/dev/null
|
||||
) || exiterr2
|
||||
) || exiterr2
|
||||
}
|
||||
|
||||
bigecho "Installing packages required for the VPN..."
|
||||
install_vpn_pkgs_1() {
|
||||
bigecho "Installing packages required for the VPN..."
|
||||
erp="--enablerepo"
|
||||
rp1="$erp=epel"
|
||||
rp2="$erp=*server-*optional*"
|
||||
rp3="$erp=*releases-optional*"
|
||||
rp4="$erp=[Pp]ower[Tt]ools"
|
||||
[ "$os_type" = "rhel" ] && rp4="$erp=codeready-builder-for-rhel-8-*"
|
||||
|
||||
erp="--enablerepo"
|
||||
rp1="$erp=epel"
|
||||
rp2="$erp=*server-*optional*"
|
||||
rp3="$erp=*releases-optional*"
|
||||
rp4="$erp=[Pp]ower[Tt]ools"
|
||||
[ "$os_type" = "rhel" ] && rp4="$erp=codeready-builder-for-rhel-8-*"
|
||||
|
||||
(
|
||||
(
|
||||
set -x
|
||||
yum -y -q install nss-devel nspr-devel pkgconfig pam-devel \
|
||||
libcap-ng-devel libselinux-devel curl-devel nss-tools \
|
||||
flex bison gcc make util-linux ppp >/dev/null
|
||||
) || exiterr2
|
||||
(
|
||||
) || exiterr2
|
||||
}
|
||||
|
||||
install_vpn_pkgs_2() {
|
||||
(
|
||||
set -x
|
||||
yum "$rp1" -y -q install xl2tpd >/dev/null 2>&1
|
||||
) || exiterr2
|
||||
) || exiterr2
|
||||
}
|
||||
|
||||
use_nft=0
|
||||
p1=systemd-devel
|
||||
p2=libevent-devel
|
||||
p3=fipscheck-devel
|
||||
p4=iptables-services
|
||||
if [ "$os_ver" = "7" ]; then
|
||||
install_vpn_pkgs_3() {
|
||||
use_nft=0
|
||||
p1=systemd-devel
|
||||
p2=libevent-devel
|
||||
p3=fipscheck-devel
|
||||
p4=iptables-services
|
||||
if [ "$os_ver" = "7" ]; then
|
||||
(
|
||||
set -x
|
||||
yum "$rp2" "$rp3" -y -q install $p1 $p2 $p3 $p4 >/dev/null
|
||||
) || exiterr2
|
||||
else
|
||||
else
|
||||
(
|
||||
set -x
|
||||
yum "$rp4" -y -q install $p1 $p2 $p3 >/dev/null
|
||||
@ -195,40 +217,44 @@ else
|
||||
set -x
|
||||
yum -y -q install $p4 >/dev/null
|
||||
) || exiterr2
|
||||
fi
|
||||
fi
|
||||
}
|
||||
|
||||
bigecho "Installing Fail2Ban to protect SSH..."
|
||||
|
||||
(
|
||||
install_fail2ban() {
|
||||
bigecho "Installing Fail2Ban to protect SSH..."
|
||||
(
|
||||
set -x
|
||||
yum "$rp1" -y -q install fail2ban >/dev/null
|
||||
) || exiterr2
|
||||
) || exiterr2
|
||||
}
|
||||
|
||||
bigecho "Downloading IKEv2 script..."
|
||||
|
||||
ikev2_url="https://github.com/hwdsl2/setup-ipsec-vpn/raw/master/extras/ikev2setup.sh"
|
||||
(
|
||||
get_ikev2_script() {
|
||||
bigecho "Downloading IKEv2 script..."
|
||||
ikev2_url="https://github.com/hwdsl2/setup-ipsec-vpn/raw/master/extras/ikev2setup.sh"
|
||||
(
|
||||
set -x
|
||||
wget -t 3 -T 30 -q -O ikev2.sh "$ikev2_url"
|
||||
) || /bin/rm -f ikev2.sh
|
||||
[ -s ikev2.sh ] && chmod +x ikev2.sh && ln -s /opt/src/ikev2.sh /usr/bin 2>/dev/null
|
||||
) || /bin/rm -f ikev2.sh
|
||||
[ -s ikev2.sh ] && chmod +x ikev2.sh && ln -s /opt/src/ikev2.sh /usr/bin 2>/dev/null
|
||||
}
|
||||
|
||||
bigecho "Downloading Libreswan..."
|
||||
|
||||
SWAN_VER=4.4
|
||||
swan_file="libreswan-$SWAN_VER.tar.gz"
|
||||
swan_url1="https://github.com/libreswan/libreswan/archive/v$SWAN_VER.tar.gz"
|
||||
swan_url2="https://download.libreswan.org/$swan_file"
|
||||
(
|
||||
get_libreswan() {
|
||||
bigecho "Downloading Libreswan..."
|
||||
SWAN_VER=4.4
|
||||
swan_file="libreswan-$SWAN_VER.tar.gz"
|
||||
swan_url1="https://github.com/libreswan/libreswan/archive/v$SWAN_VER.tar.gz"
|
||||
swan_url2="https://download.libreswan.org/$swan_file"
|
||||
(
|
||||
set -x
|
||||
wget -t 3 -T 30 -q -O "$swan_file" "$swan_url1" || wget -t 3 -T 30 -q -O "$swan_file" "$swan_url2"
|
||||
) || exit 1
|
||||
/bin/rm -rf "/opt/src/libreswan-$SWAN_VER"
|
||||
tar xzf "$swan_file" && /bin/rm -f "$swan_file"
|
||||
) || exit 1
|
||||
/bin/rm -rf "/opt/src/libreswan-$SWAN_VER"
|
||||
tar xzf "$swan_file" && /bin/rm -f "$swan_file"
|
||||
}
|
||||
|
||||
bigecho "Compiling and installing Libreswan, please wait..."
|
||||
|
||||
cd "libreswan-$SWAN_VER" || exit 1
|
||||
install_libreswan() {
|
||||
bigecho "Compiling and installing Libreswan, please wait..."
|
||||
cd "libreswan-$SWAN_VER" || exit 1
|
||||
cat > Makefile.inc.local <<'EOF'
|
||||
WERROR_CFLAGS=-w -s
|
||||
USE_DNSSEC=false
|
||||
@ -236,36 +262,38 @@ USE_DH2=true
|
||||
USE_NSS_KDF=false
|
||||
FINALNSSDIR=/etc/ipsec.d
|
||||
EOF
|
||||
if ! grep -qs IFLA_XFRM_LINK /usr/include/linux/if_link.h; then
|
||||
if ! grep -qs IFLA_XFRM_LINK /usr/include/linux/if_link.h; then
|
||||
echo "USE_XFRM_INTERFACE_IFLA_HEADER=true" >> Makefile.inc.local
|
||||
fi
|
||||
NPROCS=$(grep -c ^processor /proc/cpuinfo)
|
||||
[ -z "$NPROCS" ] && NPROCS=1
|
||||
(
|
||||
fi
|
||||
NPROCS=$(grep -c ^processor /proc/cpuinfo)
|
||||
[ -z "$NPROCS" ] && NPROCS=1
|
||||
(
|
||||
set -x
|
||||
make "-j$((NPROCS+1))" -s base >/dev/null && make -s install-base >/dev/null
|
||||
)
|
||||
)
|
||||
|
||||
cd /opt/src || exit 1
|
||||
/bin/rm -rf "/opt/src/libreswan-$SWAN_VER"
|
||||
if ! /usr/local/sbin/ipsec --version 2>/dev/null | grep -qF "$SWAN_VER"; then
|
||||
cd /opt/src || exit 1
|
||||
/bin/rm -rf "/opt/src/libreswan-$SWAN_VER"
|
||||
if ! /usr/local/sbin/ipsec --version 2>/dev/null | grep -qF "$SWAN_VER"; then
|
||||
exiterr "Libreswan $SWAN_VER failed to build."
|
||||
fi
|
||||
fi
|
||||
}
|
||||
|
||||
bigecho "Creating VPN configuration..."
|
||||
create_vpn_config() {
|
||||
bigecho "Creating VPN configuration..."
|
||||
|
||||
L2TP_NET=${VPN_L2TP_NET:-'192.168.42.0/24'}
|
||||
L2TP_LOCAL=${VPN_L2TP_LOCAL:-'192.168.42.1'}
|
||||
L2TP_POOL=${VPN_L2TP_POOL:-'192.168.42.10-192.168.42.250'}
|
||||
XAUTH_NET=${VPN_XAUTH_NET:-'192.168.43.0/24'}
|
||||
XAUTH_POOL=${VPN_XAUTH_POOL:-'192.168.43.10-192.168.43.250'}
|
||||
DNS_SRV1=${VPN_DNS_SRV1:-'8.8.8.8'}
|
||||
DNS_SRV2=${VPN_DNS_SRV2:-'8.8.4.4'}
|
||||
DNS_SRVS="\"$DNS_SRV1 $DNS_SRV2\""
|
||||
[ -n "$VPN_DNS_SRV1" ] && [ -z "$VPN_DNS_SRV2" ] && DNS_SRVS="$DNS_SRV1"
|
||||
L2TP_NET=${VPN_L2TP_NET:-'192.168.42.0/24'}
|
||||
L2TP_LOCAL=${VPN_L2TP_LOCAL:-'192.168.42.1'}
|
||||
L2TP_POOL=${VPN_L2TP_POOL:-'192.168.42.10-192.168.42.250'}
|
||||
XAUTH_NET=${VPN_XAUTH_NET:-'192.168.43.0/24'}
|
||||
XAUTH_POOL=${VPN_XAUTH_POOL:-'192.168.43.10-192.168.43.250'}
|
||||
DNS_SRV1=${VPN_DNS_SRV1:-'8.8.8.8'}
|
||||
DNS_SRV2=${VPN_DNS_SRV2:-'8.8.4.4'}
|
||||
DNS_SRVS="\"$DNS_SRV1 $DNS_SRV2\""
|
||||
[ -n "$VPN_DNS_SRV1" ] && [ -z "$VPN_DNS_SRV2" ] && DNS_SRVS="$DNS_SRV1"
|
||||
|
||||
# Create IPsec config
|
||||
conf_bk "/etc/ipsec.conf"
|
||||
# Create IPsec config
|
||||
conf_bk "/etc/ipsec.conf"
|
||||
cat > /etc/ipsec.conf <<EOF
|
||||
version 2.0
|
||||
|
||||
@ -315,14 +343,14 @@ conn xauth-psk
|
||||
include /etc/ipsec.d/*.conf
|
||||
EOF
|
||||
|
||||
# Specify IPsec PSK
|
||||
conf_bk "/etc/ipsec.secrets"
|
||||
# Specify IPsec PSK
|
||||
conf_bk "/etc/ipsec.secrets"
|
||||
cat > /etc/ipsec.secrets <<EOF
|
||||
%any %any : PSK "$VPN_IPSEC_PSK"
|
||||
EOF
|
||||
|
||||
# Create xl2tpd config
|
||||
conf_bk "/etc/xl2tpd/xl2tpd.conf"
|
||||
# Create xl2tpd config
|
||||
conf_bk "/etc/xl2tpd/xl2tpd.conf"
|
||||
cat > /etc/xl2tpd/xl2tpd.conf <<EOF
|
||||
[global]
|
||||
port = 1701
|
||||
@ -338,8 +366,8 @@ pppoptfile = /etc/ppp/options.xl2tpd
|
||||
length bit = yes
|
||||
EOF
|
||||
|
||||
# Set xl2tpd options
|
||||
conf_bk "/etc/ppp/options.xl2tpd"
|
||||
# Set xl2tpd options
|
||||
conf_bk "/etc/ppp/options.xl2tpd"
|
||||
cat > /etc/ppp/options.xl2tpd <<EOF
|
||||
+mschap-v2
|
||||
ipcp-accept-local
|
||||
@ -355,27 +383,52 @@ connect-delay 5000
|
||||
ms-dns $DNS_SRV1
|
||||
EOF
|
||||
|
||||
if [ -z "$VPN_DNS_SRV1" ] || [ -n "$VPN_DNS_SRV2" ]; then
|
||||
if [ -z "$VPN_DNS_SRV1" ] || [ -n "$VPN_DNS_SRV2" ]; then
|
||||
cat >> /etc/ppp/options.xl2tpd <<EOF
|
||||
ms-dns $DNS_SRV2
|
||||
EOF
|
||||
fi
|
||||
fi
|
||||
|
||||
# Create VPN credentials
|
||||
conf_bk "/etc/ppp/chap-secrets"
|
||||
# Create VPN credentials
|
||||
conf_bk "/etc/ppp/chap-secrets"
|
||||
cat > /etc/ppp/chap-secrets <<EOF
|
||||
"$VPN_USER" l2tpd "$VPN_PASSWORD" *
|
||||
EOF
|
||||
|
||||
conf_bk "/etc/ipsec.d/passwd"
|
||||
VPN_PASSWORD_ENC=$(openssl passwd -1 "$VPN_PASSWORD")
|
||||
conf_bk "/etc/ipsec.d/passwd"
|
||||
VPN_PASSWORD_ENC=$(openssl passwd -1 "$VPN_PASSWORD")
|
||||
cat > /etc/ipsec.d/passwd <<EOF
|
||||
$VPN_USER:$VPN_PASSWORD_ENC:xauth-psk
|
||||
EOF
|
||||
}
|
||||
|
||||
bigecho "Updating sysctl settings..."
|
||||
create_f2b_config() {
|
||||
F2B_FILE=/etc/fail2ban/jail.local
|
||||
if [ ! -f "$F2B_FILE" ]; then
|
||||
bigecho "Creating basic Fail2Ban rules..."
|
||||
cat > "$F2B_FILE" <<'EOF'
|
||||
[ssh-iptables]
|
||||
enabled = true
|
||||
filter = sshd
|
||||
logpath = /var/log/secure
|
||||
EOF
|
||||
|
||||
if ! grep -qs "hwdsl2 VPN script" /etc/sysctl.conf; then
|
||||
if [ "$use_nft" = "1" ]; then
|
||||
cat >> "$F2B_FILE" <<'EOF'
|
||||
port = ssh
|
||||
banaction = nftables-multiport[blocktype=drop]
|
||||
EOF
|
||||
else
|
||||
cat >> "$F2B_FILE" <<'EOF'
|
||||
action = iptables[name=SSH, port=ssh, protocol=tcp]
|
||||
EOF
|
||||
fi
|
||||
fi
|
||||
}
|
||||
|
||||
update_sysctl() {
|
||||
bigecho "Updating sysctl settings..."
|
||||
if ! grep -qs "hwdsl2 VPN script" /etc/sysctl.conf; then
|
||||
conf_bk "/etc/sysctl.conf"
|
||||
cat >> /etc/sysctl.conf <<EOF
|
||||
|
||||
@ -397,47 +450,26 @@ net.core.wmem_max = 12582912
|
||||
net.core.rmem_max = 12582912
|
||||
net.ipv4.tcp_rmem = 10240 87380 12582912
|
||||
net.ipv4.tcp_wmem = 10240 87380 12582912
|
||||
EOF
|
||||
fi
|
||||
|
||||
F2B_FILE=/etc/fail2ban/jail.local
|
||||
if [ ! -f "$F2B_FILE" ]; then
|
||||
bigecho "Creating basic Fail2Ban rules..."
|
||||
cat > "$F2B_FILE" <<'EOF'
|
||||
[ssh-iptables]
|
||||
enabled = true
|
||||
filter = sshd
|
||||
logpath = /var/log/secure
|
||||
EOF
|
||||
|
||||
if [ "$use_nft" = "1" ]; then
|
||||
cat >> "$F2B_FILE" <<'EOF'
|
||||
port = ssh
|
||||
banaction = nftables-multiport[blocktype=drop]
|
||||
EOF
|
||||
else
|
||||
cat >> "$F2B_FILE" <<'EOF'
|
||||
action = iptables[name=SSH, port=ssh, protocol=tcp]
|
||||
EOF
|
||||
fi
|
||||
fi
|
||||
}
|
||||
|
||||
bigecho "Updating IPTables rules..."
|
||||
|
||||
IPT_FILE=/etc/sysconfig/iptables
|
||||
[ "$use_nft" = "1" ] && IPT_FILE=/etc/sysconfig/nftables.conf
|
||||
ipt_flag=0
|
||||
if ! grep -qs "hwdsl2 VPN script" "$IPT_FILE"; then
|
||||
update_iptables() {
|
||||
bigecho "Updating IPTables rules..."
|
||||
IPT_FILE=/etc/sysconfig/iptables
|
||||
[ "$use_nft" = "1" ] && IPT_FILE=/etc/sysconfig/nftables.conf
|
||||
ipt_flag=0
|
||||
if ! grep -qs "hwdsl2 VPN script" "$IPT_FILE"; then
|
||||
ipt_flag=1
|
||||
fi
|
||||
fi
|
||||
|
||||
ipi='iptables -I INPUT'
|
||||
ipf='iptables -I FORWARD'
|
||||
ipp='iptables -t nat -I POSTROUTING'
|
||||
res='RELATED,ESTABLISHED'
|
||||
nff='nft insert rule inet firewalld'
|
||||
nfn='nft insert rule inet nftables_svc'
|
||||
if [ "$ipt_flag" = "1" ]; then
|
||||
ipi='iptables -I INPUT'
|
||||
ipf='iptables -I FORWARD'
|
||||
ipp='iptables -t nat -I POSTROUTING'
|
||||
res='RELATED,ESTABLISHED'
|
||||
nff='nft insert rule inet firewalld'
|
||||
nfn='nft insert rule inet nftables_svc'
|
||||
if [ "$ipt_flag" = "1" ]; then
|
||||
service fail2ban stop >/dev/null 2>&1
|
||||
if [ "$use_nft" = "1" ]; then
|
||||
nft list ruleset > "$IPT_FILE.old-$SYS_DT"
|
||||
@ -478,18 +510,19 @@ if [ "$ipt_flag" = "1" ]; then
|
||||
else
|
||||
iptables-save >> "$IPT_FILE"
|
||||
fi
|
||||
fi
|
||||
fi
|
||||
}
|
||||
|
||||
bigecho "Enabling services on boot..."
|
||||
|
||||
systemctl --now mask firewalld 2>/dev/null
|
||||
if [ "$use_nft" = "1" ]; then
|
||||
enable_on_boot() {
|
||||
bigecho "Enabling services on boot..."
|
||||
systemctl --now mask firewalld 2>/dev/null
|
||||
if [ "$use_nft" = "1" ]; then
|
||||
systemctl enable nftables fail2ban 2>/dev/null
|
||||
else
|
||||
else
|
||||
systemctl enable iptables fail2ban 2>/dev/null
|
||||
fi
|
||||
fi
|
||||
|
||||
if ! grep -qs "hwdsl2 VPN script" /etc/rc.local; then
|
||||
if ! grep -qs "hwdsl2 VPN script" /etc/rc.local; then
|
||||
if [ -f /etc/rc.local ]; then
|
||||
conf_bk "/etc/rc.local"
|
||||
else
|
||||
@ -503,49 +536,39 @@ service ipsec restart
|
||||
service xl2tpd restart
|
||||
echo 1 > /proc/sys/net/ipv4/ip_forward)&
|
||||
EOF
|
||||
fi
|
||||
fi
|
||||
}
|
||||
|
||||
bigecho "Starting services..."
|
||||
start_services() {
|
||||
bigecho "Starting services..."
|
||||
sysctl -e -q -p
|
||||
|
||||
restorecon /etc/ipsec.d/*db 2>/dev/null
|
||||
restorecon /usr/local/sbin -Rv 2>/dev/null
|
||||
restorecon /usr/local/libexec/ipsec -Rv 2>/dev/null
|
||||
chmod +x /etc/rc.local
|
||||
chmod 600 /etc/ipsec.secrets* /etc/ppp/chap-secrets* /etc/ipsec.d/passwd*
|
||||
|
||||
sysctl -e -q -p
|
||||
restorecon /etc/ipsec.d/*db 2>/dev/null
|
||||
restorecon /usr/local/sbin -Rv 2>/dev/null
|
||||
restorecon /usr/local/libexec/ipsec -Rv 2>/dev/null
|
||||
|
||||
chmod +x /etc/rc.local
|
||||
chmod 600 /etc/ipsec.secrets* /etc/ppp/chap-secrets* /etc/ipsec.d/passwd*
|
||||
|
||||
if [ "$use_nft" = "1" ]; then
|
||||
if [ "$use_nft" = "1" ]; then
|
||||
nft -f "$IPT_FILE"
|
||||
else
|
||||
else
|
||||
iptables-restore < "$IPT_FILE"
|
||||
fi
|
||||
fi
|
||||
|
||||
# Fix xl2tpd if l2tp_ppp is unavailable
|
||||
if ! modprobe -q l2tp_ppp; then
|
||||
# Fix xl2tpd if l2tp_ppp is unavailable
|
||||
if ! modprobe -q l2tp_ppp; then
|
||||
sed -i '/^ExecStartPre=\//s/=/=-/' /usr/lib/systemd/system/xl2tpd.service
|
||||
systemctl daemon-reload
|
||||
fi
|
||||
fi
|
||||
|
||||
mkdir -p /run/pluto
|
||||
service fail2ban restart 2>/dev/null
|
||||
service ipsec restart 2>/dev/null
|
||||
service xl2tpd restart 2>/dev/null
|
||||
|
||||
swan_ver_url="https://dl.ls20.com/v1/$os_type/$os_ver/swanver?arch=$os_arch&ver=$SWAN_VER"
|
||||
swan_ver_latest=$(wget -t 3 -T 15 -qO- "$swan_ver_url")
|
||||
if printf '%s' "$swan_ver_latest" | grep -Eq '^([3-9]|[1-9][0-9]{1,2})(\.([0-9]|[1-9][0-9]{1,2})){1,2}$' \
|
||||
&& [ -n "$SWAN_VER" ] && [ "$SWAN_VER" != "$swan_ver_latest" ] \
|
||||
&& printf '%s\n%s' "$SWAN_VER" "$swan_ver_latest" | sort -C -V; then
|
||||
cat <<EOF
|
||||
|
||||
Note: A newer version of Libreswan ($swan_ver_latest) is available.
|
||||
To update, run:
|
||||
wget https://git.io/vpnupgrade -O vpnup.sh && sudo sh vpnup.sh
|
||||
EOF
|
||||
fi
|
||||
mkdir -p /run/pluto
|
||||
service fail2ban restart 2>/dev/null
|
||||
service ipsec restart 2>/dev/null
|
||||
service xl2tpd restart 2>/dev/null
|
||||
}
|
||||
|
||||
show_vpn_info() {
|
||||
cat <<EOF
|
||||
|
||||
================================================
|
||||
@ -568,7 +591,54 @@ IKEv2 guide: https://git.io/ikev2
|
||||
================================================
|
||||
|
||||
EOF
|
||||
}
|
||||
|
||||
check_swan_ver() {
|
||||
swan_ver_url="https://dl.ls20.com/v1/$os_type/$os_ver/swanver?arch=$os_arch&ver=$SWAN_VER"
|
||||
[ "$1" != "0" ] && swan_ver_url="$swan_ver_url&e=$2"
|
||||
swan_ver_latest=$(wget -t 3 -T 15 -qO- "$swan_ver_url")
|
||||
if printf '%s' "$swan_ver_latest" | grep -Eq '^([3-9]|[1-9][0-9]{1,2})(\.([0-9]|[1-9][0-9]{1,2})){1,2}$' \
|
||||
&& [ "$1" = "0" ] && [ -n "$SWAN_VER" ] && [ "$SWAN_VER" != "$swan_ver_latest" ] \
|
||||
&& printf '%s\n%s' "$SWAN_VER" "$swan_ver_latest" | sort -C -V; then
|
||||
cat <<EOF
|
||||
Note: A newer version of Libreswan ($swan_ver_latest) is available.
|
||||
To update, run:
|
||||
wget https://git.io/vpnupgrade -O vpnup.sh && sudo sh vpnup.sh
|
||||
|
||||
EOF
|
||||
fi
|
||||
}
|
||||
|
||||
finish() {
|
||||
check_swan_ver "$1" "$2"
|
||||
exit "$1"
|
||||
}
|
||||
|
||||
vpnsetup() {
|
||||
check_root
|
||||
check_vz
|
||||
check_os
|
||||
check_iface
|
||||
check_creds
|
||||
check_dns
|
||||
start_setup
|
||||
install_setup_pkgs
|
||||
detect_ip
|
||||
add_epel_repo
|
||||
install_vpn_pkgs_1
|
||||
install_vpn_pkgs_2
|
||||
install_vpn_pkgs_3
|
||||
install_fail2ban
|
||||
get_ikev2_script
|
||||
get_libreswan
|
||||
install_libreswan
|
||||
create_vpn_config
|
||||
create_f2b_config
|
||||
update_sysctl
|
||||
update_iptables
|
||||
enable_on_boot
|
||||
start_services
|
||||
show_vpn_info
|
||||
}
|
||||
|
||||
## Defer setup until we have the complete script
|
||||
|
||||
@ -47,12 +47,23 @@ check_ip() {
|
||||
printf '%s' "$1" | tr -d '\n' | grep -Eq "$IP_REGEX"
|
||||
}
|
||||
|
||||
vpnsetup() {
|
||||
check_root() {
|
||||
if [ "$(id -u)" != 0 ]; then
|
||||
exiterr "Script must be run as root. Try 'sudo sh $0'"
|
||||
fi
|
||||
}
|
||||
|
||||
os_type=$(lsb_release -si 2>/dev/null)
|
||||
os_arch=$(uname -m | tr -dc 'A-Za-z0-9_-')
|
||||
[ -z "$os_type" ] && [ -f /etc/os-release ] && os_type=$(. /etc/os-release && printf '%s' "$ID")
|
||||
case $os_type in
|
||||
check_vz() {
|
||||
if [ -f /proc/user_beancounters ]; then
|
||||
exiterr "OpenVZ VPS is not supported."
|
||||
fi
|
||||
}
|
||||
|
||||
check_os() {
|
||||
os_type=$(lsb_release -si 2>/dev/null)
|
||||
os_arch=$(uname -m | tr -dc 'A-Za-z0-9_-')
|
||||
[ -z "$os_type" ] && [ -f /etc/os-release ] && os_type=$(. /etc/os-release && printf '%s' "$ID")
|
||||
case $os_type in
|
||||
[Uu]buntu)
|
||||
os_type=ubuntu
|
||||
;;
|
||||
@ -65,28 +76,22 @@ case $os_type in
|
||||
*)
|
||||
exiterr "This script only supports Ubuntu and Debian."
|
||||
;;
|
||||
esac
|
||||
esac
|
||||
|
||||
os_ver=$(sed 's/\..*//' /etc/debian_version | tr -dc 'A-Za-z0-9')
|
||||
if [ "$os_ver" = "8" ] || [ "$os_ver" = "jessiesid" ]; then
|
||||
os_ver=$(sed 's/\..*//' /etc/debian_version | tr -dc 'A-Za-z0-9')
|
||||
if [ "$os_ver" = "8" ] || [ "$os_ver" = "jessiesid" ]; then
|
||||
exiterr "Debian 8 or Ubuntu < 16.04 is not supported."
|
||||
fi
|
||||
if { [ "$os_ver" = "10" ] || [ "$os_ver" = "11" ]; } && [ ! -e /dev/ppp ]; then
|
||||
fi
|
||||
if { [ "$os_ver" = "10" ] || [ "$os_ver" = "11" ]; } && [ ! -e /dev/ppp ]; then
|
||||
exiterr "/dev/ppp is missing. Debian 11 or 10 users, see: https://git.io/vpndebian10"
|
||||
fi
|
||||
fi
|
||||
}
|
||||
|
||||
if [ -f /proc/user_beancounters ]; then
|
||||
exiterr "OpenVZ VPS is not supported."
|
||||
fi
|
||||
|
||||
if [ "$(id -u)" != 0 ]; then
|
||||
exiterr "Script must be run as root. Try 'sudo sh $0'"
|
||||
fi
|
||||
|
||||
def_iface=$(route 2>/dev/null | grep -m 1 '^default' | grep -o '[^ ]*$')
|
||||
[ -z "$def_iface" ] && def_iface=$(ip -4 route list 0/0 2>/dev/null | grep -m 1 -Po '(?<=dev )(\S+)')
|
||||
def_state=$(cat "/sys/class/net/$def_iface/operstate" 2>/dev/null)
|
||||
if [ -n "$def_state" ] && [ "$def_state" != "down" ]; then
|
||||
check_iface() {
|
||||
def_iface=$(route 2>/dev/null | grep -m 1 '^default' | grep -o '[^ ]*$')
|
||||
[ -z "$def_iface" ] && def_iface=$(ip -4 route list 0/0 2>/dev/null | grep -m 1 -Po '(?<=dev )(\S+)')
|
||||
def_state=$(cat "/sys/class/net/$def_iface/operstate" 2>/dev/null)
|
||||
if [ -n "$def_state" ] && [ "$def_state" != "down" ]; then
|
||||
if ! uname -m | grep -qi -e '^arm' -e '^aarch64'; then
|
||||
case $def_iface in
|
||||
wl*)
|
||||
@ -95,127 +100,149 @@ if [ -n "$def_state" ] && [ "$def_state" != "down" ]; then
|
||||
esac
|
||||
fi
|
||||
NET_IFACE="$def_iface"
|
||||
else
|
||||
else
|
||||
eth0_state=$(cat "/sys/class/net/eth0/operstate" 2>/dev/null)
|
||||
if [ -z "$eth0_state" ] || [ "$eth0_state" = "down" ]; then
|
||||
exiterr "Could not detect the default network interface."
|
||||
fi
|
||||
NET_IFACE=eth0
|
||||
fi
|
||||
fi
|
||||
}
|
||||
|
||||
[ -n "$YOUR_IPSEC_PSK" ] && VPN_IPSEC_PSK="$YOUR_IPSEC_PSK"
|
||||
[ -n "$YOUR_USERNAME" ] && VPN_USER="$YOUR_USERNAME"
|
||||
[ -n "$YOUR_PASSWORD" ] && VPN_PASSWORD="$YOUR_PASSWORD"
|
||||
check_creds() {
|
||||
[ -n "$YOUR_IPSEC_PSK" ] && VPN_IPSEC_PSK="$YOUR_IPSEC_PSK"
|
||||
[ -n "$YOUR_USERNAME" ] && VPN_USER="$YOUR_USERNAME"
|
||||
[ -n "$YOUR_PASSWORD" ] && VPN_PASSWORD="$YOUR_PASSWORD"
|
||||
|
||||
if [ -z "$VPN_IPSEC_PSK" ] && [ -z "$VPN_USER" ] && [ -z "$VPN_PASSWORD" ]; then
|
||||
if [ -z "$VPN_IPSEC_PSK" ] && [ -z "$VPN_USER" ] && [ -z "$VPN_PASSWORD" ]; then
|
||||
bigecho "VPN credentials not set by user. Generating random PSK and password..."
|
||||
VPN_IPSEC_PSK=$(LC_CTYPE=C tr -dc 'A-HJ-NPR-Za-km-z2-9' </dev/urandom 2>/dev/null | head -c 20)
|
||||
VPN_USER=vpnuser
|
||||
VPN_PASSWORD=$(LC_CTYPE=C tr -dc 'A-HJ-NPR-Za-km-z2-9' </dev/urandom 2>/dev/null | head -c 16)
|
||||
fi
|
||||
fi
|
||||
|
||||
if [ -z "$VPN_IPSEC_PSK" ] || [ -z "$VPN_USER" ] || [ -z "$VPN_PASSWORD" ]; then
|
||||
if [ -z "$VPN_IPSEC_PSK" ] || [ -z "$VPN_USER" ] || [ -z "$VPN_PASSWORD" ]; then
|
||||
exiterr "All VPN credentials must be specified. Edit the script and re-enter them."
|
||||
fi
|
||||
fi
|
||||
|
||||
if printf '%s' "$VPN_IPSEC_PSK $VPN_USER $VPN_PASSWORD" | LC_ALL=C grep -q '[^ -~]\+'; then
|
||||
if printf '%s' "$VPN_IPSEC_PSK $VPN_USER $VPN_PASSWORD" | LC_ALL=C grep -q '[^ -~]\+'; then
|
||||
exiterr "VPN credentials must not contain non-ASCII characters."
|
||||
fi
|
||||
fi
|
||||
|
||||
case "$VPN_IPSEC_PSK $VPN_USER $VPN_PASSWORD" in
|
||||
case "$VPN_IPSEC_PSK $VPN_USER $VPN_PASSWORD" in
|
||||
*[\\\"\']*)
|
||||
exiterr "VPN credentials must not contain these special characters: \\ \" '"
|
||||
;;
|
||||
esac
|
||||
esac
|
||||
}
|
||||
|
||||
if { [ -n "$VPN_DNS_SRV1" ] && ! check_ip "$VPN_DNS_SRV1"; } \
|
||||
check_dns() {
|
||||
if { [ -n "$VPN_DNS_SRV1" ] && ! check_ip "$VPN_DNS_SRV1"; } \
|
||||
|| { [ -n "$VPN_DNS_SRV2" ] && ! check_ip "$VPN_DNS_SRV2"; } then
|
||||
exiterr "The DNS server specified is invalid."
|
||||
fi
|
||||
fi
|
||||
}
|
||||
|
||||
if [ -x /sbin/iptables ] && ! iptables -nL INPUT >/dev/null 2>&1; then
|
||||
check_iptables() {
|
||||
if [ -x /sbin/iptables ] && ! iptables -nL INPUT >/dev/null 2>&1; then
|
||||
exiterr "IPTables check failed. Reboot and re-run this script."
|
||||
fi
|
||||
fi
|
||||
}
|
||||
|
||||
bigecho "VPN setup in progress... Please be patient."
|
||||
# shellcheck disable=SC2154,SC2039,SC3047
|
||||
start_setup() {
|
||||
bigecho "VPN setup in progress... Please be patient."
|
||||
trap 'dlo=$dl;dl=$LINENO' DEBUG 2>/dev/null
|
||||
trap 'finish $? $((dlo+1))' EXIT
|
||||
mkdir -p /opt/src
|
||||
cd /opt/src || exit 1
|
||||
}
|
||||
|
||||
count=0
|
||||
apt_lk=/var/lib/apt/lists/lock
|
||||
pkg_lk=/var/lib/dpkg/lock
|
||||
while fuser "$apt_lk" "$pkg_lk" >/dev/null 2>&1 \
|
||||
wait_for_apt() {
|
||||
count=0
|
||||
apt_lk=/var/lib/apt/lists/lock
|
||||
pkg_lk=/var/lib/dpkg/lock
|
||||
while fuser "$apt_lk" "$pkg_lk" >/dev/null 2>&1 \
|
||||
|| lsof "$apt_lk" >/dev/null 2>&1 || lsof "$pkg_lk" >/dev/null 2>&1; do
|
||||
[ "$count" = "0" ] && bigecho "Waiting for apt to be available..."
|
||||
[ "$count" = "0" ] && echo "## Waiting for apt to be available..."
|
||||
[ "$count" -ge "100" ] && exiterr "Could not get apt/dpkg lock."
|
||||
count=$((count+1))
|
||||
printf '%s' '.'
|
||||
sleep 3
|
||||
done
|
||||
done
|
||||
}
|
||||
|
||||
mkdir -p /opt/src
|
||||
cd /opt/src || exit 1
|
||||
|
||||
bigecho "Installing packages required for setup..."
|
||||
|
||||
export DEBIAN_FRONTEND=noninteractive
|
||||
(
|
||||
install_setup_pkgs_1() {
|
||||
bigecho "Installing packages required for setup..."
|
||||
export DEBIAN_FRONTEND=noninteractive
|
||||
(
|
||||
set -x
|
||||
apt-get -yqq update
|
||||
) || exiterr "'apt-get update' failed."
|
||||
(
|
||||
) || exiterr "'apt-get update' failed."
|
||||
}
|
||||
|
||||
install_setup_pkgs_2() {
|
||||
(
|
||||
set -x
|
||||
apt-get -yqq install wget dnsutils openssl \
|
||||
iptables iproute2 gawk grep sed net-tools >/dev/null
|
||||
) || exiterr2
|
||||
) || exiterr2
|
||||
}
|
||||
|
||||
bigecho "Trying to auto discover IP of this server..."
|
||||
detect_ip() {
|
||||
bigecho "Trying to auto discover IP of this server..."
|
||||
public_ip=${VPN_PUBLIC_IP:-''}
|
||||
check_ip "$public_ip" || public_ip=$(dig @resolver1.opendns.com -t A -4 myip.opendns.com +short)
|
||||
check_ip "$public_ip" || public_ip=$(wget -t 3 -T 15 -qO- http://ipv4.icanhazip.com)
|
||||
check_ip "$public_ip" || exiterr "Cannot detect this server's public IP. Define it as variable 'VPN_PUBLIC_IP' and re-run this script."
|
||||
}
|
||||
|
||||
public_ip=${VPN_PUBLIC_IP:-''}
|
||||
check_ip "$public_ip" || public_ip=$(dig @resolver1.opendns.com -t A -4 myip.opendns.com +short)
|
||||
check_ip "$public_ip" || public_ip=$(wget -t 3 -T 15 -qO- http://ipv4.icanhazip.com)
|
||||
check_ip "$public_ip" || exiterr "Cannot detect this server's public IP. Define it as variable 'VPN_PUBLIC_IP' and re-run this script."
|
||||
|
||||
bigecho "Installing packages required for the VPN..."
|
||||
|
||||
(
|
||||
install_vpn_pkgs() {
|
||||
bigecho "Installing packages required for the VPN..."
|
||||
(
|
||||
set -x
|
||||
apt-get -yqq install libnss3-dev libnspr4-dev pkg-config \
|
||||
libpam0g-dev libcap-ng-dev libcap-ng-utils libselinux1-dev \
|
||||
libcurl4-nss-dev flex bison gcc make libnss3-tools \
|
||||
libevent-dev libsystemd-dev uuid-runtime ppp xl2tpd >/dev/null
|
||||
) || exiterr2
|
||||
) || exiterr2
|
||||
}
|
||||
|
||||
bigecho "Installing Fail2Ban to protect SSH..."
|
||||
|
||||
(
|
||||
install_fail2ban() {
|
||||
bigecho "Installing Fail2Ban to protect SSH..."
|
||||
(
|
||||
set -x
|
||||
apt-get -yqq install fail2ban >/dev/null
|
||||
) || exiterr2
|
||||
) || exiterr2
|
||||
}
|
||||
|
||||
bigecho "Downloading IKEv2 script..."
|
||||
|
||||
ikev2_url="https://github.com/hwdsl2/setup-ipsec-vpn/raw/master/extras/ikev2setup.sh"
|
||||
(
|
||||
get_ikev2_script() {
|
||||
bigecho "Downloading IKEv2 script..."
|
||||
ikev2_url="https://github.com/hwdsl2/setup-ipsec-vpn/raw/master/extras/ikev2setup.sh"
|
||||
(
|
||||
set -x
|
||||
wget -t 3 -T 30 -q -O ikev2.sh "$ikev2_url"
|
||||
) || /bin/rm -f ikev2.sh
|
||||
[ -s ikev2.sh ] && chmod +x ikev2.sh && ln -s /opt/src/ikev2.sh /usr/bin 2>/dev/null
|
||||
) || /bin/rm -f ikev2.sh
|
||||
[ -s ikev2.sh ] && chmod +x ikev2.sh && ln -s /opt/src/ikev2.sh /usr/bin 2>/dev/null
|
||||
}
|
||||
|
||||
bigecho "Downloading Libreswan..."
|
||||
|
||||
SWAN_VER=4.4
|
||||
swan_file="libreswan-$SWAN_VER.tar.gz"
|
||||
swan_url1="https://github.com/libreswan/libreswan/archive/v$SWAN_VER.tar.gz"
|
||||
swan_url2="https://download.libreswan.org/$swan_file"
|
||||
(
|
||||
get_libreswan() {
|
||||
bigecho "Downloading Libreswan..."
|
||||
SWAN_VER=4.4
|
||||
swan_file="libreswan-$SWAN_VER.tar.gz"
|
||||
swan_url1="https://github.com/libreswan/libreswan/archive/v$SWAN_VER.tar.gz"
|
||||
swan_url2="https://download.libreswan.org/$swan_file"
|
||||
(
|
||||
set -x
|
||||
wget -t 3 -T 30 -q -O "$swan_file" "$swan_url1" || wget -t 3 -T 30 -q -O "$swan_file" "$swan_url2"
|
||||
) || exit 1
|
||||
/bin/rm -rf "/opt/src/libreswan-$SWAN_VER"
|
||||
tar xzf "$swan_file" && /bin/rm -f "$swan_file"
|
||||
) || exit 1
|
||||
/bin/rm -rf "/opt/src/libreswan-$SWAN_VER"
|
||||
tar xzf "$swan_file" && /bin/rm -f "$swan_file"
|
||||
}
|
||||
|
||||
bigecho "Compiling and installing Libreswan, please wait..."
|
||||
|
||||
cd "libreswan-$SWAN_VER" || exit 1
|
||||
install_libreswan() {
|
||||
bigecho "Compiling and installing Libreswan, please wait..."
|
||||
cd "libreswan-$SWAN_VER" || exit 1
|
||||
cat > Makefile.inc.local <<'EOF'
|
||||
WERROR_CFLAGS=-w -s
|
||||
USE_DNSSEC=false
|
||||
@ -223,44 +250,46 @@ USE_DH2=true
|
||||
USE_NSS_KDF=false
|
||||
FINALNSSDIR=/etc/ipsec.d
|
||||
EOF
|
||||
if ! grep -qs 'VERSION_CODENAME=' /etc/os-release; then
|
||||
if ! grep -qs 'VERSION_CODENAME=' /etc/os-release; then
|
||||
cat >> Makefile.inc.local <<'EOF'
|
||||
USE_DH31=false
|
||||
USE_NSS_AVA_COPY=true
|
||||
USE_NSS_IPSEC_PROFILE=false
|
||||
USE_GLIBC_KERN_FLIP_HEADERS=true
|
||||
EOF
|
||||
fi
|
||||
if ! grep -qs IFLA_XFRM_LINK /usr/include/linux/if_link.h; then
|
||||
fi
|
||||
if ! grep -qs IFLA_XFRM_LINK /usr/include/linux/if_link.h; then
|
||||
echo "USE_XFRM_INTERFACE_IFLA_HEADER=true" >> Makefile.inc.local
|
||||
fi
|
||||
NPROCS=$(grep -c ^processor /proc/cpuinfo)
|
||||
[ -z "$NPROCS" ] && NPROCS=1
|
||||
(
|
||||
fi
|
||||
NPROCS=$(grep -c ^processor /proc/cpuinfo)
|
||||
[ -z "$NPROCS" ] && NPROCS=1
|
||||
(
|
||||
set -x
|
||||
make "-j$((NPROCS+1))" -s base >/dev/null && make -s install-base >/dev/null
|
||||
)
|
||||
)
|
||||
|
||||
cd /opt/src || exit 1
|
||||
/bin/rm -rf "/opt/src/libreswan-$SWAN_VER"
|
||||
if ! /usr/local/sbin/ipsec --version 2>/dev/null | grep -qF "$SWAN_VER"; then
|
||||
cd /opt/src || exit 1
|
||||
/bin/rm -rf "/opt/src/libreswan-$SWAN_VER"
|
||||
if ! /usr/local/sbin/ipsec --version 2>/dev/null | grep -qF "$SWAN_VER"; then
|
||||
exiterr "Libreswan $SWAN_VER failed to build."
|
||||
fi
|
||||
fi
|
||||
}
|
||||
|
||||
bigecho "Creating VPN configuration..."
|
||||
create_vpn_config() {
|
||||
bigecho "Creating VPN configuration..."
|
||||
|
||||
L2TP_NET=${VPN_L2TP_NET:-'192.168.42.0/24'}
|
||||
L2TP_LOCAL=${VPN_L2TP_LOCAL:-'192.168.42.1'}
|
||||
L2TP_POOL=${VPN_L2TP_POOL:-'192.168.42.10-192.168.42.250'}
|
||||
XAUTH_NET=${VPN_XAUTH_NET:-'192.168.43.0/24'}
|
||||
XAUTH_POOL=${VPN_XAUTH_POOL:-'192.168.43.10-192.168.43.250'}
|
||||
DNS_SRV1=${VPN_DNS_SRV1:-'8.8.8.8'}
|
||||
DNS_SRV2=${VPN_DNS_SRV2:-'8.8.4.4'}
|
||||
DNS_SRVS="\"$DNS_SRV1 $DNS_SRV2\""
|
||||
[ -n "$VPN_DNS_SRV1" ] && [ -z "$VPN_DNS_SRV2" ] && DNS_SRVS="$DNS_SRV1"
|
||||
L2TP_NET=${VPN_L2TP_NET:-'192.168.42.0/24'}
|
||||
L2TP_LOCAL=${VPN_L2TP_LOCAL:-'192.168.42.1'}
|
||||
L2TP_POOL=${VPN_L2TP_POOL:-'192.168.42.10-192.168.42.250'}
|
||||
XAUTH_NET=${VPN_XAUTH_NET:-'192.168.43.0/24'}
|
||||
XAUTH_POOL=${VPN_XAUTH_POOL:-'192.168.43.10-192.168.43.250'}
|
||||
DNS_SRV1=${VPN_DNS_SRV1:-'8.8.8.8'}
|
||||
DNS_SRV2=${VPN_DNS_SRV2:-'8.8.4.4'}
|
||||
DNS_SRVS="\"$DNS_SRV1 $DNS_SRV2\""
|
||||
[ -n "$VPN_DNS_SRV1" ] && [ -z "$VPN_DNS_SRV2" ] && DNS_SRVS="$DNS_SRV1"
|
||||
|
||||
# Create IPsec config
|
||||
conf_bk "/etc/ipsec.conf"
|
||||
# Create IPsec config
|
||||
conf_bk "/etc/ipsec.conf"
|
||||
cat > /etc/ipsec.conf <<EOF
|
||||
version 2.0
|
||||
|
||||
@ -310,20 +339,20 @@ conn xauth-psk
|
||||
include /etc/ipsec.d/*.conf
|
||||
EOF
|
||||
|
||||
if uname -m | grep -qi '^arm'; then
|
||||
if uname -m | grep -qi '^arm'; then
|
||||
if ! modprobe -q sha512; then
|
||||
sed -i '/phase2alg/s/,aes256-sha2_512//' /etc/ipsec.conf
|
||||
fi
|
||||
fi
|
||||
fi
|
||||
|
||||
# Specify IPsec PSK
|
||||
conf_bk "/etc/ipsec.secrets"
|
||||
# Specify IPsec PSK
|
||||
conf_bk "/etc/ipsec.secrets"
|
||||
cat > /etc/ipsec.secrets <<EOF
|
||||
%any %any : PSK "$VPN_IPSEC_PSK"
|
||||
EOF
|
||||
|
||||
# Create xl2tpd config
|
||||
conf_bk "/etc/xl2tpd/xl2tpd.conf"
|
||||
# Create xl2tpd config
|
||||
conf_bk "/etc/xl2tpd/xl2tpd.conf"
|
||||
cat > /etc/xl2tpd/xl2tpd.conf <<EOF
|
||||
[global]
|
||||
port = 1701
|
||||
@ -339,8 +368,8 @@ pppoptfile = /etc/ppp/options.xl2tpd
|
||||
length bit = yes
|
||||
EOF
|
||||
|
||||
# Set xl2tpd options
|
||||
conf_bk "/etc/ppp/options.xl2tpd"
|
||||
# Set xl2tpd options
|
||||
conf_bk "/etc/ppp/options.xl2tpd"
|
||||
cat > /etc/ppp/options.xl2tpd <<EOF
|
||||
+mschap-v2
|
||||
ipcp-accept-local
|
||||
@ -356,27 +385,28 @@ connect-delay 5000
|
||||
ms-dns $DNS_SRV1
|
||||
EOF
|
||||
|
||||
if [ -z "$VPN_DNS_SRV1" ] || [ -n "$VPN_DNS_SRV2" ]; then
|
||||
if [ -z "$VPN_DNS_SRV1" ] || [ -n "$VPN_DNS_SRV2" ]; then
|
||||
cat >> /etc/ppp/options.xl2tpd <<EOF
|
||||
ms-dns $DNS_SRV2
|
||||
EOF
|
||||
fi
|
||||
fi
|
||||
|
||||
# Create VPN credentials
|
||||
conf_bk "/etc/ppp/chap-secrets"
|
||||
# Create VPN credentials
|
||||
conf_bk "/etc/ppp/chap-secrets"
|
||||
cat > /etc/ppp/chap-secrets <<EOF
|
||||
"$VPN_USER" l2tpd "$VPN_PASSWORD" *
|
||||
EOF
|
||||
|
||||
conf_bk "/etc/ipsec.d/passwd"
|
||||
VPN_PASSWORD_ENC=$(openssl passwd -1 "$VPN_PASSWORD")
|
||||
conf_bk "/etc/ipsec.d/passwd"
|
||||
VPN_PASSWORD_ENC=$(openssl passwd -1 "$VPN_PASSWORD")
|
||||
cat > /etc/ipsec.d/passwd <<EOF
|
||||
$VPN_USER:$VPN_PASSWORD_ENC:xauth-psk
|
||||
EOF
|
||||
}
|
||||
|
||||
bigecho "Updating sysctl settings..."
|
||||
|
||||
if ! grep -qs "hwdsl2 VPN script" /etc/sysctl.conf; then
|
||||
update_sysctl() {
|
||||
bigecho "Updating sysctl settings..."
|
||||
if ! grep -qs "hwdsl2 VPN script" /etc/sysctl.conf; then
|
||||
conf_bk "/etc/sysctl.conf"
|
||||
cat >> /etc/sysctl.conf <<EOF
|
||||
|
||||
@ -399,22 +429,23 @@ net.core.rmem_max = 12582912
|
||||
net.ipv4.tcp_rmem = 10240 87380 12582912
|
||||
net.ipv4.tcp_wmem = 10240 87380 12582912
|
||||
EOF
|
||||
fi
|
||||
fi
|
||||
}
|
||||
|
||||
bigecho "Updating IPTables rules..."
|
||||
|
||||
IPT_FILE=/etc/iptables.rules
|
||||
IPT_FILE2=/etc/iptables/rules.v4
|
||||
ipt_flag=0
|
||||
if ! grep -qs "hwdsl2 VPN script" "$IPT_FILE"; then
|
||||
update_iptables() {
|
||||
bigecho "Updating IPTables rules..."
|
||||
IPT_FILE=/etc/iptables.rules
|
||||
IPT_FILE2=/etc/iptables/rules.v4
|
||||
ipt_flag=0
|
||||
if ! grep -qs "hwdsl2 VPN script" "$IPT_FILE"; then
|
||||
ipt_flag=1
|
||||
fi
|
||||
fi
|
||||
|
||||
ipi='iptables -I INPUT'
|
||||
ipf='iptables -I FORWARD'
|
||||
ipp='iptables -t nat -I POSTROUTING'
|
||||
res='RELATED,ESTABLISHED'
|
||||
if [ "$ipt_flag" = "1" ]; then
|
||||
ipi='iptables -I INPUT'
|
||||
ipf='iptables -I FORWARD'
|
||||
ipp='iptables -t nat -I POSTROUTING'
|
||||
res='RELATED,ESTABLISHED'
|
||||
if [ "$ipt_flag" = "1" ]; then
|
||||
service fail2ban stop >/dev/null 2>&1
|
||||
iptables-save > "$IPT_FILE.old-$SYS_DT"
|
||||
$ipi 1 -p udp --dport 1701 -m policy --dir in --pol none -j DROP
|
||||
@ -440,18 +471,19 @@ if [ "$ipt_flag" = "1" ]; then
|
||||
conf_bk "$IPT_FILE2"
|
||||
/bin/cp -f "$IPT_FILE" "$IPT_FILE2"
|
||||
fi
|
||||
fi
|
||||
fi
|
||||
}
|
||||
|
||||
bigecho "Enabling services on boot..."
|
||||
|
||||
IPT_PST=/etc/init.d/iptables-persistent
|
||||
IPT_PST2=/usr/share/netfilter-persistent/plugins.d/15-ip4tables
|
||||
ipt_load=1
|
||||
if [ -f "$IPT_FILE2" ] && { [ -f "$IPT_PST" ] || [ -f "$IPT_PST2" ]; }; then
|
||||
enable_on_boot() {
|
||||
bigecho "Enabling services on boot..."
|
||||
IPT_PST=/etc/init.d/iptables-persistent
|
||||
IPT_PST2=/usr/share/netfilter-persistent/plugins.d/15-ip4tables
|
||||
ipt_load=1
|
||||
if [ -f "$IPT_FILE2" ] && { [ -f "$IPT_PST" ] || [ -f "$IPT_PST2" ]; }; then
|
||||
ipt_load=0
|
||||
fi
|
||||
fi
|
||||
|
||||
if [ "$ipt_load" = "1" ]; then
|
||||
if [ "$ipt_load" = "1" ]; then
|
||||
mkdir -p /etc/network/if-pre-up.d
|
||||
cat > /etc/network/if-pre-up.d/iptablesload <<'EOF'
|
||||
#!/bin/sh
|
||||
@ -482,14 +514,14 @@ WantedBy=multi-user.target
|
||||
EOF
|
||||
systemctl enable load-iptables-rules 2>/dev/null
|
||||
fi
|
||||
fi
|
||||
fi
|
||||
|
||||
for svc in fail2ban ipsec xl2tpd; do
|
||||
for svc in fail2ban ipsec xl2tpd; do
|
||||
update-rc.d "$svc" enable >/dev/null 2>&1
|
||||
systemctl enable "$svc" 2>/dev/null
|
||||
done
|
||||
done
|
||||
|
||||
if ! grep -qs "hwdsl2 VPN script" /etc/rc.local; then
|
||||
if ! grep -qs "hwdsl2 VPN script" /etc/rc.local; then
|
||||
if [ -f /etc/rc.local ]; then
|
||||
conf_bk "/etc/rc.local"
|
||||
sed --follow-symlinks -i '/^exit 0/d' /etc/rc.local
|
||||
@ -505,33 +537,23 @@ service xl2tpd restart
|
||||
echo 1 > /proc/sys/net/ipv4/ip_forward)&
|
||||
exit 0
|
||||
EOF
|
||||
fi
|
||||
fi
|
||||
}
|
||||
|
||||
bigecho "Starting services..."
|
||||
start_services() {
|
||||
bigecho "Starting services..."
|
||||
sysctl -e -q -p
|
||||
|
||||
sysctl -e -q -p
|
||||
chmod +x /etc/rc.local
|
||||
chmod 600 /etc/ipsec.secrets* /etc/ppp/chap-secrets* /etc/ipsec.d/passwd*
|
||||
|
||||
chmod +x /etc/rc.local
|
||||
chmod 600 /etc/ipsec.secrets* /etc/ppp/chap-secrets* /etc/ipsec.d/passwd*
|
||||
|
||||
mkdir -p /run/pluto
|
||||
service fail2ban restart 2>/dev/null
|
||||
service ipsec restart 2>/dev/null
|
||||
service xl2tpd restart 2>/dev/null
|
||||
|
||||
swan_ver_url="https://dl.ls20.com/v1/$os_type/$os_ver/swanver?arch=$os_arch&ver=$SWAN_VER"
|
||||
swan_ver_latest=$(wget -t 3 -T 15 -qO- "$swan_ver_url")
|
||||
if printf '%s' "$swan_ver_latest" | grep -Eq '^([3-9]|[1-9][0-9]{1,2})(\.([0-9]|[1-9][0-9]{1,2})){1,2}$' \
|
||||
&& [ -n "$SWAN_VER" ] && [ "$SWAN_VER" != "$swan_ver_latest" ] \
|
||||
&& printf '%s\n%s' "$SWAN_VER" "$swan_ver_latest" | sort -C -V; then
|
||||
cat <<EOF
|
||||
|
||||
Note: A newer version of Libreswan ($swan_ver_latest) is available.
|
||||
To update, run:
|
||||
wget https://git.io/vpnupgrade -O vpnup.sh && sudo sh vpnup.sh
|
||||
EOF
|
||||
fi
|
||||
mkdir -p /run/pluto
|
||||
service fail2ban restart 2>/dev/null
|
||||
service ipsec restart 2>/dev/null
|
||||
service xl2tpd restart 2>/dev/null
|
||||
}
|
||||
|
||||
show_vpn_info() {
|
||||
cat <<EOF
|
||||
|
||||
================================================
|
||||
@ -554,7 +576,53 @@ IKEv2 guide: https://git.io/ikev2
|
||||
================================================
|
||||
|
||||
EOF
|
||||
}
|
||||
|
||||
check_swan_ver() {
|
||||
swan_ver_url="https://dl.ls20.com/v1/$os_type/$os_ver/swanver?arch=$os_arch&ver=$SWAN_VER"
|
||||
[ "$1" != "0" ] && swan_ver_url="$swan_ver_url&e=$2"
|
||||
swan_ver_latest=$(wget -t 3 -T 15 -qO- "$swan_ver_url")
|
||||
if printf '%s' "$swan_ver_latest" | grep -Eq '^([3-9]|[1-9][0-9]{1,2})(\.([0-9]|[1-9][0-9]{1,2})){1,2}$' \
|
||||
&& [ "$1" = "0" ] && [ -n "$SWAN_VER" ] && [ "$SWAN_VER" != "$swan_ver_latest" ] \
|
||||
&& printf '%s\n%s' "$SWAN_VER" "$swan_ver_latest" | sort -C -V; then
|
||||
cat <<EOF
|
||||
Note: A newer version of Libreswan ($swan_ver_latest) is available.
|
||||
To update, run:
|
||||
wget https://git.io/vpnupgrade -O vpnup.sh && sudo sh vpnup.sh
|
||||
|
||||
EOF
|
||||
fi
|
||||
}
|
||||
|
||||
finish() {
|
||||
check_swan_ver "$1" "$2"
|
||||
exit "$1"
|
||||
}
|
||||
|
||||
vpnsetup() {
|
||||
check_root
|
||||
check_vz
|
||||
check_os
|
||||
check_iface
|
||||
check_creds
|
||||
check_dns
|
||||
check_iptables
|
||||
start_setup
|
||||
wait_for_apt
|
||||
install_setup_pkgs_1
|
||||
install_setup_pkgs_2
|
||||
detect_ip
|
||||
install_vpn_pkgs
|
||||
install_fail2ban
|
||||
get_ikev2_script
|
||||
get_libreswan
|
||||
install_libreswan
|
||||
create_vpn_config
|
||||
update_sysctl
|
||||
update_iptables
|
||||
enable_on_boot
|
||||
start_services
|
||||
show_vpn_info
|
||||
}
|
||||
|
||||
## Defer setup until we have the complete script
|
||||
|
||||
Loading…
Reference in New Issue
Block a user