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Add Alpine Linux

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This commit is contained in:
hwdsl2 2021-09-11 15:00:29 -05:00
parent e2a9c4a0c3
commit 3c557c7f22
7 changed files with 1013 additions and 49 deletions
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11
extras/ikev2setup.sh
View File

@ -67,14 +67,19 @@ check_os() {
;; ;;
[Aa]lpine) [Aa]lpine)
os_type=alpine os_type=alpine
[ "$in_container" != "1" ] && exiterr "This script only supports Alpine Linux in a Docker container."
;; ;;
*) *)
exiterr "This script only supports Ubuntu, Debian, CentOS/RHEL 7/8 and Amazon Linux 2." echo "Error: This script only supports one of the following OS:" >&2
echo " Ubuntu, Debian, CentOS/RHEL, Rocky Linux, AlmaLinux," >&2
echo " Amazon Linux 2 and Alpine Linux" >&2
exit 1
;; ;;
esac esac
if [ "$os_type" = "alpine" ]; then if [ "$os_type" = "alpine" ]; then
os_ver=$(. /etc/os-release && printf '%s' "$VERSION_ID") os_ver=$(. /etc/os-release && printf '%s' "$VERSION_ID" | cut -d '.' -f 1,2)
if [ "$os_ver" != "3.14" ]; then
exiterr "This script only supports Alpine Linux 3.14."
fi
else else
os_ver=$(sed 's/\..*//' /etc/debian_version | tr -dc 'A-Za-z0-9') os_ver=$(sed 's/\..*//' /etc/debian_version | tr -dc 'A-Za-z0-9')
fi fi

48
extras/quickstart.sh
View File

@ -1,6 +1,7 @@
#!/bin/sh #!/bin/sh
# #
# Quick start script to set up an IPsec VPN server with IPsec/L2TP, Cisco IPsec and IKEv2 # Quick start script to set up an IPsec VPN server on Ubuntu, Debian,
# CentOS/RHEL, Rocky Linux, AlmaLinux, Amazon Linux 2 and Alpine Linux
# Works on any dedicated server or virtual private server (VPS) # Works on any dedicated server or virtual private server (VPS)
# #
# DO NOT RUN THIS SCRIPT ON YOUR PC OR MAC! # DO NOT RUN THIS SCRIPT ON YOUR PC OR MAC!
@ -61,23 +62,38 @@ check_os() {
[Rr]aspbian) [Rr]aspbian)
os_type=raspbian os_type=raspbian
;; ;;
[Aa]lpine)
os_type=alpine
;;
*) *)
exiterr "This script only supports Ubuntu, Debian, CentOS/RHEL 7/8 and Amazon Linux 2." echo "Error: This script only supports one of the following OS:" >&2
echo " Ubuntu, Debian, CentOS/RHEL, Rocky Linux, AlmaLinux," >&2
echo " Amazon Linux 2 and Alpine Linux" >&2
exit 1
;; ;;
esac esac
os_ver=$(sed 's/\..*//' /etc/debian_version | tr -dc 'A-Za-z0-9') if [ "$os_type" = "alpine" ]; then
if [ "$os_ver" = "8" ] || [ "$os_ver" = "jessiesid" ]; then os_ver=$(. /etc/os-release && printf '%s' "$VERSION_ID" | cut -d '.' -f 1,2)
exiterr "Debian 8 or Ubuntu < 16.04 is not supported." if [ "$os_ver" != "3.14" ]; then
fi exiterr "This script only supports Alpine Linux 3.14."
if { [ "$os_ver" = "10" ] || [ "$os_ver" = "11" ]; } && [ ! -e /dev/ppp ]; then fi
exiterr "/dev/ppp is missing. Debian 11 or 10 users, see: https://git.io/vpndebian10" else
os_ver=$(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
exiterr "/dev/ppp is missing. Debian 11 or 10 users, see: https://git.io/vpndebian10"
fi
fi fi
fi fi
} }
check_iface() { check_iface() {
def_iface=$(route 2>/dev/null | grep -m 1 '^default' | grep -o '[^ ]*$') 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+)') if [ "$os_type" != "alpine" ]; then
[ -z "$def_iface" ] && def_iface=$(ip -4 route list 0/0 2>/dev/null | grep -m 1 -Po '(?<=dev )(\S+)')
fi
def_state=$(cat "/sys/class/net/$def_iface/operstate" 2>/dev/null) def_state=$(cat "/sys/class/net/$def_iface/operstate" 2>/dev/null)
check_wl=0 check_wl=0
if [ -n "$def_state" ] && [ "$def_state" != "down" ]; then if [ -n "$def_state" ] && [ "$def_state" != "down" ]; then
@ -120,7 +136,7 @@ wait_for_apt() {
done done
} }
install_wget() { install_pkgs() {
if ! command -v wget >/dev/null 2>&1; then if ! command -v wget >/dev/null 2>&1; then
if [ "$os_type" = "ubuntu" ] || [ "$os_type" = "debian" ] || [ "$os_type" = "raspbian" ]; then if [ "$os_type" = "ubuntu" ] || [ "$os_type" = "debian" ] || [ "$os_type" = "raspbian" ]; then
wait_for_apt wait_for_apt
@ -133,13 +149,19 @@ install_wget() {
set -x set -x
apt-get -yqq install wget >/dev/null apt-get -yqq install wget >/dev/null
) || exiterr "'apt-get install wget' failed." ) || exiterr "'apt-get install wget' failed."
else elif [ "$os_type" != "alpine" ]; then
( (
set -x set -x
yum -y -q install wget >/dev/null yum -y -q install wget >/dev/null
) || exiterr "'yum install wget' failed." ) || exiterr "'yum install wget' failed."
fi fi
fi fi
if [ "$os_type" = "alpine" ]; then
(
set -x
apk add -U -q bash net-tools wget sed grep
) || exiterr "'apk add' failed."
fi
} }
get_setup_url() { get_setup_url() {
@ -149,6 +171,8 @@ get_setup_url() {
sh_file="vpnsetup_centos.sh" sh_file="vpnsetup_centos.sh"
elif [ "$os_type" = "amzn" ]; then elif [ "$os_type" = "amzn" ]; then
sh_file="vpnsetup_amzn.sh" sh_file="vpnsetup_amzn.sh"
elif [ "$os_type" = "alpine" ]; then
sh_file="vpnsetup_alpine.sh"
fi fi
setup_url="$base_url/$sh_file" setup_url="$base_url/$sh_file"
} }
@ -183,7 +207,7 @@ quickstart() {
check_os check_os
check_iface check_iface
check_iptables check_iptables
install_wget install_pkgs
get_setup_url get_setup_url
run_setup run_setup
} }

31
extras/vpnuninstall.sh
View File

@ -1,7 +1,7 @@
#!/bin/bash #!/bin/bash
# #
# Script to uninstall IPsec VPN on Ubuntu, Debian, CentOS/RHEL, # Script to uninstall IPsec VPN on Ubuntu, Debian, CentOS/RHEL,
# Rocky Linux, AlmaLinux and Amazon Linux 2 # Rocky Linux, AlmaLinux, Amazon Linux 2 and Alpine Linux
# #
# DO NOT RUN THIS SCRIPT ON YOUR PC OR MAC! # DO NOT RUN THIS SCRIPT ON YOUR PC OR MAC!
# #
@ -53,8 +53,14 @@ check_os() {
[Rr]aspbian) [Rr]aspbian)
os_type=raspbian os_type=raspbian
;; ;;
[Aa]lpine)
os_type=alpine
;;
*) *)
exiterr "This script only supports Ubuntu, Debian, CentOS/RHEL 7/8 and Amazon Linux 2." echo "Error: This script only supports one of the following OS:" >&2
echo " Ubuntu, Debian, CentOS/RHEL, Rocky Linux, AlmaLinux," >&2
echo " Amazon Linux 2 and Alpine Linux" >&2
exit 1
;; ;;
esac esac
fi fi
@ -70,7 +76,9 @@ check_libreswan() {
check_iface() { check_iface() {
def_iface=$(route 2>/dev/null | grep -m 1 '^default' | grep -o '[^ ]*$') 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+)') if [ "$os_type" != "alpine" ]; then
[ -z "$def_iface" ] && def_iface=$(ip -4 route list 0/0 2>/dev/null | grep -m 1 -Po '(?<=dev )(\S+)')
fi
def_state=$(cat "/sys/class/net/$def_iface/operstate" 2>/dev/null) def_state=$(cat "/sys/class/net/$def_iface/operstate" 2>/dev/null)
if [ -n "$def_state" ] && [ "$def_state" != "down" ]; then if [ -n "$def_state" ] && [ "$def_state" != "down" ]; then
check_wl=0 check_wl=0
@ -146,6 +154,8 @@ remove_xl2tpd() {
if [ "$os_type" = "ubuntu" ] || [ "$os_type" = "debian" ] || [ "$os_type" = "raspbian" ]; then if [ "$os_type" = "ubuntu" ] || [ "$os_type" = "debian" ] || [ "$os_type" = "raspbian" ]; then
export DEBIAN_FRONTEND=noninteractive export DEBIAN_FRONTEND=noninteractive
apt-get -yqq purge xl2tpd >/dev/null apt-get -yqq purge xl2tpd >/dev/null
elif [ "$os_type" = "alpine" ]; then
apk del -q xl2tpd
else else
yum -y -q remove xl2tpd >/dev/null yum -y -q remove xl2tpd >/dev/null
fi fi
@ -155,7 +165,11 @@ update_sysctl() {
if grep -qs "hwdsl2 VPN script" /etc/sysctl.conf; then if grep -qs "hwdsl2 VPN script" /etc/sysctl.conf; then
bigecho "Updating sysctl settings..." bigecho "Updating sysctl settings..."
conf_bk "/etc/sysctl.conf" conf_bk "/etc/sysctl.conf"
sed --follow-symlinks -i '/# Added by hwdsl2 VPN script/,+17d' /etc/sysctl.conf if [ "$os_type" = "alpine" ]; then
sed -i '/# Added by hwdsl2 VPN script/,+17d' /etc/sysctl.conf
else
sed --follow-symlinks -i '/# Added by hwdsl2 VPN script/,+17d' /etc/sysctl.conf
fi
echo 0 > /proc/sys/net/ipv4/ip_forward echo 0 > /proc/sys/net/ipv4/ip_forward
fi fi
} }
@ -164,13 +178,18 @@ update_rclocal() {
if grep -qs "hwdsl2 VPN script" /etc/rc.local; then if grep -qs "hwdsl2 VPN script" /etc/rc.local; then
bigecho "Updating rc.local..." bigecho "Updating rc.local..."
conf_bk "/etc/rc.local" conf_bk "/etc/rc.local"
sed --follow-symlinks -i '/# Added by hwdsl2 VPN script/,+4d' /etc/rc.local if [ "$os_type" = "alpine" ]; then
sed -i '/# Added by hwdsl2 VPN script/,+4d' /etc/rc.local
else
sed --follow-symlinks -i '/# Added by hwdsl2 VPN script/,+4d' /etc/rc.local
fi
fi fi
} }
update_iptables_rules() { update_iptables_rules() {
use_nft=0 use_nft=0
if [ "$os_type" = "ubuntu" ] || [ "$os_type" = "debian" ] || [ "$os_type" = "raspbian" ]; then if [ "$os_type" = "ubuntu" ] || [ "$os_type" = "debian" ] || [ "$os_type" = "raspbian" ] \
|| [ "$os_type" = "alpine" ]; then
IPT_FILE=/etc/iptables.rules IPT_FILE=/etc/iptables.rules
IPT_FILE2=/etc/iptables/rules.v4 IPT_FILE2=/etc/iptables/rules.v4
else else

68
extras/vpnupgrade.sh
View File

@ -1,7 +1,7 @@
#!/bin/sh #!/bin/sh
# #
# Script to update Libreswan on Ubuntu, Debian, CentOS/RHEL, Rocky Linux, # Script to update Libreswan on Ubuntu, Debian, CentOS/RHEL, Rocky Linux,
# AlmaLinux and Amazon Linux 2 # AlmaLinux, Amazon Linux 2 and Alpine Linux
# #
# The latest version of this script is available at: # The latest version of this script is available at:
# https://github.com/hwdsl2/setup-ipsec-vpn # https://github.com/hwdsl2/setup-ipsec-vpn
@ -64,31 +64,59 @@ check_os() {
[Rr]aspbian) [Rr]aspbian)
os_type=raspbian os_type=raspbian
;; ;;
[Aa]lpine)
os_type=alpine
;;
*) *)
exiterr "This script only supports Ubuntu, Debian, CentOS/RHEL 7/8 and Amazon Linux 2." echo "Error: This script only supports one of the following OS:" >&2
echo " Ubuntu, Debian, CentOS/RHEL, Rocky Linux, AlmaLinux," >&2
echo " Amazon Linux 2 and Alpine Linux" >&2
exit 1
;; ;;
esac esac
os_ver=$(sed 's/\..*//' /etc/debian_version | tr -dc 'A-Za-z0-9') if [ "$os_type" = "alpine" ]; then
if [ "$os_ver" = "8" ] || [ "$os_ver" = "jessiesid" ]; then os_ver=$(. /etc/os-release && printf '%s' "$VERSION_ID" | cut -d '.' -f 1,2)
exiterr "Debian 8 or Ubuntu < 16.04 is not supported." if [ "$os_ver" != "3.14" ]; then
exiterr "This script only supports Alpine Linux 3.14."
fi
else
os_ver=$(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
fi fi
fi fi
} }
check_libreswan() { check_libreswan() {
case $SWAN_VER in if [ "$os_type" != "alpine" ]; then
3.32|4.[1-5]) case $SWAN_VER in
true 3.32|4.[1-5])
;; true
*) ;;
*)
cat 1>&2 <<EOF cat 1>&2 <<EOF
Error: Libreswan version '$SWAN_VER' is not supported. Error: Libreswan version '$SWAN_VER' is not supported.
This script can install one of these versions: This script can install one of these versions:
3.32, 4.1-4.4 or 4.5 3.32, 4.1-4.4 or 4.5
EOF EOF
exit 1 exit 1
;; ;;
esac esac
else
case $SWAN_VER in
4.5)
true
;;
*)
cat 1>&2 <<EOF
Error: Libreswan version '$SWAN_VER' is not supported.
This script can install Libreswan 4.5.
EOF
exit 1
;;
esac
fi
if [ "$SWAN_VER" = "3.32" ] && [ "$os_ver" = "11" ]; then if [ "$SWAN_VER" = "3.32" ] && [ "$os_ver" = "11" ]; then
exiterr "Libreswan 3.32 is not supported on Debian 11." exiterr "Libreswan 3.32 is not supported on Debian 11."
@ -104,7 +132,7 @@ EOF
fi fi
} }
install_wget() { install_pkgs() {
if ! command -v wget >/dev/null 2>&1; then if ! command -v wget >/dev/null 2>&1; then
if [ "$os_type" = "ubuntu" ] || [ "$os_type" = "debian" ] || [ "$os_type" = "raspbian" ]; then if [ "$os_type" = "ubuntu" ] || [ "$os_type" = "debian" ] || [ "$os_type" = "raspbian" ]; then
export DEBIAN_FRONTEND=noninteractive export DEBIAN_FRONTEND=noninteractive
@ -116,13 +144,19 @@ install_wget() {
set -x set -x
apt-get -yqq install wget >/dev/null apt-get -yqq install wget >/dev/null
) || exiterr "'apt-get install wget' failed." ) || exiterr "'apt-get install wget' failed."
else elif [ "$os_type" != "alpine" ]; then
( (
set -x set -x
yum -y -q install wget >/dev/null yum -y -q install wget >/dev/null
) || exiterr "'yum install wget' failed." ) || exiterr "'yum install wget' failed."
fi fi
fi fi
if [ "$os_type" = "alpine" ]; then
(
set -x
apk add -U -q bash wget sed grep
) || exiterr "'apk add' failed."
fi
} }
get_setup_url() { get_setup_url() {
@ -132,6 +166,8 @@ get_setup_url() {
sh_file="vpnupgrade_centos.sh" sh_file="vpnupgrade_centos.sh"
elif [ "$os_type" = "amzn" ]; then elif [ "$os_type" = "amzn" ]; then
sh_file="vpnupgrade_amzn.sh" sh_file="vpnupgrade_amzn.sh"
elif [ "$os_type" = "alpine" ]; then
sh_file="vpnupgrade_alpine.sh"
fi fi
setup_url="$base_url/$sh_file" setup_url="$base_url/$sh_file"
} }
@ -158,7 +194,7 @@ vpnupgrade() {
check_vz check_vz
check_os check_os
check_libreswan check_libreswan
install_wget install_pkgs
get_setup_url get_setup_url
run_setup run_setup
} }

311
extras/vpnupgrade_alpine.sh Executable file
View File

@ -0,0 +1,311 @@
#!/bin/bash
#
# Script to update Libreswan on Alpine Linux
#
# The latest version of this script is available at:
# https://github.com/hwdsl2/setup-ipsec-vpn
#
# Copyright (C) 2021 Lin Song <linsongui@gmail.com>
#
# This work is licensed under the Creative Commons Attribution-ShareAlike 3.0
# Unported License: http://creativecommons.org/licenses/by-sa/3.0/
#
# Attribution required: please include my name in any derivative and let me
# know how you have improved it!
# Specify which Libreswan version to install. See: https://libreswan.org
SWAN_VER=4.5
### DO NOT edit below this line ###
export PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
[ -n "$VPN_UPDATE_SWAN_VER" ] && SWAN_VER="$VPN_UPDATE_SWAN_VER"
exiterr() { echo "Error: $1" >&2; exit 1; }
exiterr2() { exiterr "'apk add' failed."; }
bigecho() { echo "## $1"; }
check_root() {
if [ "$(id -u)" != 0 ]; then
exiterr "Script must be run as root. Try 'sudo bash $0'"
fi
}
check_vz() {
if [ -f /proc/user_beancounters ]; then
exiterr "OpenVZ VPS is not supported."
fi
}
check_os() {
os_type=$(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 $os_type in
[Aa]lpine)
os_type=alpine
;;
*)
exiterr "This script only supports Alpine Linux."
;;
esac
os_ver=$(. /etc/os-release && printf '%s' "$VERSION_ID" | cut -d '.' -f 1,2)
if [ "$os_ver" != "3.14" ]; then
exiterr "This script only supports Alpine Linux 3.14."
fi
}
check_libreswan() {
case $SWAN_VER in
4.5)
true
;;
*)
cat 1>&2 <<EOF
Error: Libreswan version '$SWAN_VER' is not supported.
This script can install Libreswan 4.5.
EOF
exit 1
;;
esac
ipsec_ver=$(/usr/local/sbin/ipsec --version 2>/dev/null)
swan_ver_old=$(printf '%s' "$ipsec_ver" | sed -e 's/.*Libreswan U\?//' -e 's/\( (\|\/K\).*//')
if ! printf '%s' "$ipsec_ver" | grep -q "Libreswan"; then
cat 1>&2 <<'EOF'
Error: This script requires Libreswan already installed.
See: https://github.com/hwdsl2/setup-ipsec-vpn
EOF
exit 1
fi
if [ "$swan_ver_old" = "$SWAN_VER" ]; then
cat <<EOF
You already have Libreswan version $SWAN_VER installed!
If you continue, the same version will be re-installed.
EOF
printf "Do you want to continue anyway? [y/N] "
read -r response
case $response in
[yY][eE][sS]|[yY])
echo
;;
*)
echo "Abort. No changes were made."
exit 1
;;
esac
fi
}
show_setup_info() {
cat <<EOF
Welcome! Use this script to update Libreswan on your IPsec VPN server.
Current version: Libreswan $swan_ver_old
Version to install: Libreswan $SWAN_VER
Note: This script will make the following changes to your VPN configuration:
- Fix obsolete ipsec.conf and/or ikev2.conf options
- Optimize VPN ciphers
Your other VPN config files will not be modified.
EOF
if [ "$SWAN_VER" != "4.5" ]; then
cat <<'EOF'
WARNING: Older versions of Libreswan could contain known security vulnerabilities.
See https://libreswan.org/security/ for more information.
Are you sure you want to install an older version?
EOF
fi
printf "Do you want to continue? [y/N] "
read -r response
case $response in
[yY][eE][sS]|[yY])
echo
;;
*)
echo "Abort. No changes were made."
exit 1
;;
esac
}
start_setup() {
# shellcheck disable=SC2154
trap 'dlo=$dl;dl=$LINENO' DEBUG 2>/dev/null
trap 'finish $? $((dlo+1))' EXIT
mkdir -p /opt/src
cd /opt/src || exit 1
}
install_pkgs() {
bigecho "Installing required packages..."
(
set -x
apk add -U -q bash bind-tools coreutils openssl wget iproute2 sed grep \
libcap-ng libcurl libevent linux-pam musl nspr nss nss-tools \
bison flex gcc make libc-dev bsd-compat-headers linux-pam-dev nss-dev \
libcap-ng-dev libevent-dev curl-dev nspr-dev uuidgen openrc
) || exiterr2
}
get_libreswan() {
bigecho "Downloading Libreswan..."
swan_file="libreswan-$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 "$swan_file"
}
install_libreswan() {
bigecho "Compiling and installing Libreswan, please wait..."
cd "libreswan-$SWAN_VER" || exit 1
sed -i '28s/stdlib\.h/sys\/types.h/' include/fd.h
cat > Makefile.inc.local <<'EOF'
WERROR_CFLAGS=-w -s
USE_DNSSEC=false
USE_DH2=true
FINALNSSDIR=/etc/ipsec.d
USE_GLIBC_KERN_FLIP_HEADERS=true
EOF
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
exiterr "Libreswan $SWAN_VER failed to build."
fi
}
update_config() {
bigecho "Updating VPN configuration..."
IKE_NEW=" ike=aes256-sha2,aes128-sha2,aes256-sha1,aes128-sha1,aes256-sha2;modp1024,aes128-sha1;modp1024"
PHASE2_NEW=" phase2alg=aes_gcm-null,aes128-sha1,aes256-sha1,aes256-sha2_512,aes128-sha2,aes256-sha2"
if uname -m | grep -qi '^arm'; then
if ! modprobe -q sha512; then
PHASE2_NEW=" phase2alg=aes_gcm-null,aes128-sha1,aes256-sha1,aes128-sha2,aes256-sha2"
fi
fi
dns_state=0
DNS_SRV1=$(grep "modecfgdns1=" /etc/ipsec.conf | head -n 1 | cut -d '=' -f 2)
DNS_SRV2=$(grep "modecfgdns2=" /etc/ipsec.conf | head -n 1 | cut -d '=' -f 2)
[ -n "$DNS_SRV1" ] && dns_state=2
[ -n "$DNS_SRV1" ] && [ -n "$DNS_SRV2" ] && dns_state=1
[ "$(grep -c "modecfgdns1=" /etc/ipsec.conf)" -gt "1" ] && dns_state=3
sed -i".old-$(date +%F-%T)" \
-e "s/^[[:space:]]\+auth=/ phase2=/" \
-e "s/^[[:space:]]\+forceencaps=/ encapsulation=/" \
-e "s/^[[:space:]]\+ike-frag=/ fragmentation=/" \
-e "s/^[[:space:]]\+sha2_truncbug=/ sha2-truncbug=/" \
-e "s/^[[:space:]]\+sha2-truncbug=yes/ sha2-truncbug=no/" \
-e "s/^[[:space:]]\+ike=.\+/$IKE_NEW/" \
-e "s/^[[:space:]]\+phase2alg=.\+/$PHASE2_NEW/" /etc/ipsec.conf
if [ "$dns_state" = "1" ]; then
sed -i -e "s/^[[:space:]]\+modecfgdns1=.\+/ modecfgdns=\"$DNS_SRV1 $DNS_SRV2\"/" \
-e "/modecfgdns2=/d" /etc/ipsec.conf
elif [ "$dns_state" = "2" ]; then
sed -i "s/^[[:space:]]\+modecfgdns1=.\+/ modecfgdns=$DNS_SRV1/" /etc/ipsec.conf
fi
sed -i "/ikev2=never/d" /etc/ipsec.conf
sed -i "/conn shared/a \ ikev2=never" /etc/ipsec.conf
if grep -qs ike-frag /etc/ipsec.d/ikev2.conf; then
sed -i 's/^[[:space:]]\+ike-frag=/ fragmentation=/' /etc/ipsec.d/ikev2.conf
fi
}
restart_ipsec() {
bigecho "Restarting IPsec service..."
mkdir -p /run/pluto
service ipsec restart >/dev/null 2>&1
}
show_setup_complete() {
cat <<EOF
================================================
Libreswan $SWAN_VER has been successfully installed!
================================================
EOF
if [ "$dns_state" = "3" ]; then
cat <<'EOF'
IMPORTANT: You must edit /etc/ipsec.conf and replace
all occurrences of these two lines:
modecfgdns1=DNS_SERVER_1
modecfgdns2=DNS_SERVER_2
with a single line like this:
modecfgdns="DNS_SERVER_1 DNS_SERVER_2"
Then run "sudo service ipsec restart".
EOF
fi
}
check_swan_ver() {
swan_ver_cur=4.5
swan_ver_url="https://dl.ls20.com/v1/$os_type/$os_ver/swanverupg?arch=$os_arch&ver1=$swan_ver_old&ver2=$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}$' \
&& [ "$1" = "0" ] && [ "$swan_ver_cur" != "$swan_ver_latest" ] \
&& printf '%s\n%s' "$swan_ver_cur" "$swan_ver_latest" | sort -C -V; then
cat <<EOF
Note: A newer version of Libreswan ($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 "$1"
}
vpnupgrade() {
check_root
check_vz
check_os
check_libreswan
show_setup_info
start_setup
install_pkgs
get_libreswan
install_libreswan
update_config
restart_ipsec
show_setup_complete
}
## Defer setup until we have the complete script
vpnupgrade "$@"
exit 0

47
vpnsetup.sh
View File

@ -1,7 +1,7 @@
#!/bin/sh #!/bin/sh
# #
# Script for automatic setup of an IPsec VPN server on Ubuntu, Debian, # Script for automatic setup of an IPsec VPN server on Ubuntu, Debian,
# CentOS/RHEL, Rocky Linux, AlmaLinux and Amazon Linux 2 # CentOS/RHEL, Rocky Linux, AlmaLinux, Amazon Linux 2 and Alpine Linux
# Works on any dedicated server or virtual private server (VPS) # Works on any dedicated server or virtual private server (VPS)
# #
# DO NOT RUN THIS SCRIPT ON YOUR PC OR MAC! # DO NOT RUN THIS SCRIPT ON YOUR PC OR MAC!
@ -84,23 +84,38 @@ check_os() {
[Rr]aspbian) [Rr]aspbian)
os_type=raspbian os_type=raspbian
;; ;;
[Aa]lpine)
os_type=alpine
;;
*) *)
exiterr "This script only supports Ubuntu, Debian, CentOS/RHEL 7/8 and Amazon Linux 2." echo "Error: This script only supports one of the following OS:" >&2
echo " Ubuntu, Debian, CentOS/RHEL, Rocky Linux, AlmaLinux," >&2
echo " Amazon Linux 2 and Alpine Linux" >&2
exit 1
;; ;;
esac esac
os_ver=$(sed 's/\..*//' /etc/debian_version | tr -dc 'A-Za-z0-9') if [ "$os_type" = "alpine" ]; then
if [ "$os_ver" = "8" ] || [ "$os_ver" = "jessiesid" ]; then os_ver=$(. /etc/os-release && printf '%s' "$VERSION_ID" | cut -d '.' -f 1,2)
exiterr "Debian 8 or Ubuntu < 16.04 is not supported." if [ "$os_ver" != "3.14" ]; then
fi exiterr "This script only supports Alpine Linux 3.14."
if { [ "$os_ver" = "10" ] || [ "$os_ver" = "11" ]; } && [ ! -e /dev/ppp ]; then fi
exiterr "/dev/ppp is missing. Debian 11 or 10 users, see: https://git.io/vpndebian10" else
os_ver=$(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
exiterr "/dev/ppp is missing. Debian 11 or 10 users, see: https://git.io/vpndebian10"
fi
fi fi
fi fi
} }
check_iface() { check_iface() {
def_iface=$(route 2>/dev/null | grep -m 1 '^default' | grep -o '[^ ]*$') 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+)') if [ "$os_type" != "alpine" ]; then
[ -z "$def_iface" ] && def_iface=$(ip -4 route list 0/0 2>/dev/null | grep -m 1 -Po '(?<=dev )(\S+)')
fi
def_state=$(cat "/sys/class/net/$def_iface/operstate" 2>/dev/null) def_state=$(cat "/sys/class/net/$def_iface/operstate" 2>/dev/null)
check_wl=0 check_wl=0
if [ -n "$def_state" ] && [ "$def_state" != "down" ]; then if [ -n "$def_state" ] && [ "$def_state" != "down" ]; then
@ -174,7 +189,7 @@ wait_for_apt() {
done done
} }
install_wget() { install_pkgs() {
if ! command -v wget >/dev/null 2>&1; then if ! command -v wget >/dev/null 2>&1; then
if [ "$os_type" = "ubuntu" ] || [ "$os_type" = "debian" ] || [ "$os_type" = "raspbian" ]; then if [ "$os_type" = "ubuntu" ] || [ "$os_type" = "debian" ] || [ "$os_type" = "raspbian" ]; then
wait_for_apt wait_for_apt
@ -187,13 +202,19 @@ install_wget() {
set -x set -x
apt-get -yqq install wget >/dev/null apt-get -yqq install wget >/dev/null
) || exiterr "'apt-get install wget' failed." ) || exiterr "'apt-get install wget' failed."
else elif [ "$os_type" != "alpine" ]; then
( (
set -x set -x
yum -y -q install wget >/dev/null yum -y -q install wget >/dev/null
) || exiterr "'yum install wget' failed." ) || exiterr "'yum install wget' failed."
fi fi
fi fi
if [ "$os_type" = "alpine" ]; then
(
set -x
apk add -U -q bash net-tools wget sed grep
) || exiterr "'apk add' failed."
fi
} }
get_setup_url() { get_setup_url() {
@ -203,6 +224,8 @@ get_setup_url() {
sh_file="vpnsetup_centos.sh" sh_file="vpnsetup_centos.sh"
elif [ "$os_type" = "amzn" ]; then elif [ "$os_type" = "amzn" ]; then
sh_file="vpnsetup_amzn.sh" sh_file="vpnsetup_amzn.sh"
elif [ "$os_type" = "alpine" ]; then
sh_file="vpnsetup_alpine.sh"
fi fi
setup_url="$base_url/$sh_file" setup_url="$base_url/$sh_file"
} }
@ -237,7 +260,7 @@ vpnsetup() {
check_creds check_creds
check_dns check_dns
check_iptables check_iptables
install_wget install_pkgs
get_setup_url get_setup_url
run_setup run_setup
} }

546
vpnsetup_alpine.sh Executable file
View File

@ -0,0 +1,546 @@
#!/bin/bash
#
# Script for automatic setup of an IPsec VPN server on Alpine Linux
#
# DO NOT RUN THIS SCRIPT ON YOUR PC OR MAC!
#
# The latest version of this script is available at:
# https://github.com/hwdsl2/setup-ipsec-vpn
#
# Copyright (C) 2021 Lin Song <linsongui@gmail.com>
#
# This work is licensed under the Creative Commons Attribution-ShareAlike 3.0
# Unported License: http://creativecommons.org/licenses/by-sa/3.0/
#
# Attribution required: please include my name in any derivative and let me
# know how you have improved it!
# =====================================================
# Define your own values for these variables
# - IPsec pre-shared key, VPN username and password
# - All values MUST be placed inside 'single quotes'
# - DO NOT use these special characters within values: \ " '
YOUR_IPSEC_PSK=''
YOUR_USERNAME=''
YOUR_PASSWORD=''
# Important notes: https://git.io/vpnnotes
# Setup VPN clients: https://git.io/vpnclients
# IKEv2 guide: https://git.io/ikev2
# =====================================================
export PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
SYS_DT=$(date +%F-%T | tr ':' '_')
exiterr() { echo "Error: $1" >&2; exit 1; }
exiterr2() { exiterr "'apk add' failed."; }
conf_bk() { /bin/cp -f "$1" "$1.old-$SYS_DT" 2>/dev/null; }
bigecho() { echo "## $1"; }
check_ip() {
IP_REGEX='^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$'
printf '%s' "$1" | tr -d '\n' | grep -Eq "$IP_REGEX"
}
check_root() {
if [ "$(id -u)" != 0 ]; then
exiterr "Script must be run as root. Try 'sudo bash $0'"
fi
}
check_vz() {
if [ -f /proc/user_beancounters ]; then
exiterr "OpenVZ VPS is not supported."
fi
}
check_os() {
os_type=$(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 $os_type in
[Aa]lpine)
os_type=alpine
;;
*)
exiterr "This script only supports Alpine Linux."
;;
esac
os_ver=$(. /etc/os-release && printf '%s' "$VERSION_ID" | cut -d '.' -f 1,2)
if [ "$os_ver" != "3.14" ]; then
exiterr "This script only supports Alpine Linux 3.14."
fi
}
check_iface() {
def_iface=$(route 2>/dev/null | grep -m 1 '^default' | grep -o '[^ ]*$')
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 $def_iface in
wl*)
exiterr "Wireless interface '$def_iface' detected. DO NOT run this script on your PC or Mac!"
;;
esac
fi
NET_IFACE="$def_iface"
else
eth0_state=$(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
}
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 "$VPN_PASSWORD" ]; then
bigecho "VPN credentials not set by user. Generating random PSK and password..."
VPN_IPSEC_PSK=$(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=$(LC_CTYPE=C tr -dc 'A-HJ-NPR-Za-km-z2-9' </dev/urandom 2>/dev/null | head -c 16)
fi
if [ -z "$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
if printf '%s' "$VPN_IPSEC_PSK $VPN_USER $VPN_PASSWORD" | LC_ALL=C grep -q '[^ -~]\+'; then
exiterr "VPN credentials must not contain non-ASCII characters."
fi
case "$VPN_IPSEC_PSK $VPN_USER $VPN_PASSWORD" in
*[\\\"\']*)
exiterr "VPN credentials must not contain these special characters: \\ \" '"
;;
esac
}
check_dns() {
if { [ -n "$VPN_DNS_SRV1" ] && ! check_ip "$VPN_DNS_SRV1"; } \
|| { [ -n "$VPN_DNS_SRV2" ] && ! check_ip "$VPN_DNS_SRV2"; } then
exiterr "The DNS server specified is invalid."
fi
}
start_setup() {
bigecho "VPN setup in progress... Please be patient."
# shellcheck disable=SC2154
trap 'dlo=$dl;dl=$LINENO' DEBUG 2>/dev/null
trap 'finish $? $((dlo+1))' EXIT
mkdir -p /opt/src
cd /opt/src || exit 1
}
install_setup_pkgs() {
bigecho "Installing packages required for setup..."
(
set -x
apk add -U -q bash bind-tools coreutils openssl wget iproute2 sed grep
) || exiterr2
}
detect_ip() {
bigecho "Trying to auto discover IP of this server..."
public_ip=${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 "$public_ip" || exiterr "Cannot detect this server's public IP. Define it as variable 'VPN_PUBLIC_IP' and re-run this script."
}
install_vpn_pkgs() {
bigecho "Installing packages required for the VPN..."
(
set -x
apk add -U -q libcap-ng libcurl libevent linux-pam musl nspr nss nss-tools \
bison flex gcc make libc-dev bsd-compat-headers linux-pam-dev nss-dev \
libcap-ng-dev libevent-dev curl-dev nspr-dev uuidgen openrc xl2tpd
) || exiterr2
}
install_fail2ban() {
bigecho "Installing Fail2Ban to protect SSH..."
(
set -x
apk add -U -q fail2ban
) || exiterr2
}
get_ikev2_script() {
bigecho "Downloading IKEv2 script..."
ikev2_url="https://github.com/hwdsl2/setup-ipsec-vpn/raw/master/extras/ikev2setup.sh"
(
set -x
wget -t 3 -T 30 -q -O ikev2.sh "$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
}
check_libreswan() {
SWAN_VER=4.5
ipsec_ver=$(/usr/local/sbin/ipsec --version 2>/dev/null)
swan_ver_old=$(printf '%s' "$ipsec_ver" | sed -e 's/.*Libreswan U\?//' -e 's/\( (\|\/K\).*//')
[ "$swan_ver_old" = "$SWAN_VER" ]
}
get_libreswan() {
if ! check_libreswan; then
bigecho "Downloading Libreswan..."
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"
else
bigecho "Libreswan $SWAN_VER is already installed, skipping..."
fi
}
install_libreswan() {
if ! check_libreswan; then
bigecho "Compiling and installing Libreswan, please wait..."
cd "libreswan-$SWAN_VER" || exit 1
sed -i '28s/stdlib\.h/sys\/types.h/' include/fd.h
cat > Makefile.inc.local <<'EOF'
WERROR_CFLAGS=-w -s
USE_DNSSEC=false
USE_DH2=true
FINALNSSDIR=/etc/ipsec.d
USE_GLIBC_KERN_FLIP_HEADERS=true
EOF
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
exiterr "Libreswan $SWAN_VER failed to build."
fi
fi
}
create_vpn_config() {
bigecho "Creating VPN configuration..."
L2TP_NET=${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"
# Create IPsec config
conf_bk "/etc/ipsec.conf"
cat > /etc/ipsec.conf <<EOF
version 2.0
config setup
virtual-private=%v4:10.0.0.0/8,%v4:192.168.0.0/16,%v4:172.16.0.0/12,%v4:!$L2TP_NET,%v4:!$XAUTH_NET
uniqueids=no
conn shared
left=%defaultroute
leftid=$public_ip
right=%any
encapsulation=yes
authby=secret
pfs=no
rekey=no
keyingtries=5
dpddelay=30
dpdtimeout=120
dpdaction=clear
ikev2=never
ike=aes256-sha2,aes128-sha2,aes256-sha1,aes128-sha1,aes256-sha2;modp1024,aes128-sha1;modp1024
phase2alg=aes_gcm-null,aes128-sha1,aes256-sha1,aes256-sha2_512,aes128-sha2,aes256-sha2
ikelifetime=24h
salifetime=24h
sha2-truncbug=no
conn l2tp-psk
auto=add
leftprotoport=17/1701
rightprotoport=17/%any
type=transport
also=shared
conn xauth-psk
auto=add
leftsubnet=0.0.0.0/0
rightaddresspool=$XAUTH_POOL
modecfgdns=$DNS_SRVS
leftxauthserver=yes
rightxauthclient=yes
leftmodecfgserver=yes
rightmodecfgclient=yes
modecfgpull=yes
cisco-unity=yes
also=shared
include /etc/ipsec.d/*.conf
EOF
if uname -m | grep -qi '^arm'; then
if ! modprobe -q sha512; then
sed -i '/phase2alg/s/,aes256-sha2_512//' /etc/ipsec.conf
fi
fi
# Specify IPsec PSK
conf_bk "/etc/ipsec.secrets"
cat > /etc/ipsec.secrets <<EOF
%any %any : PSK "$VPN_IPSEC_PSK"
EOF
# Create xl2tpd config
conf_bk "/etc/xl2tpd/xl2tpd.conf"
cat > /etc/xl2tpd/xl2tpd.conf <<EOF
[global]
port = 1701
[lns default]
ip range = $L2TP_POOL
local ip = $L2TP_LOCAL
require chap = yes
refuse pap = yes
require authentication = yes
name = l2tpd
pppoptfile = /etc/ppp/options.xl2tpd
length bit = yes
EOF
# Set xl2tpd options
conf_bk "/etc/ppp/options.xl2tpd"
cat > /etc/ppp/options.xl2tpd <<EOF
+mschap-v2
ipcp-accept-local
ipcp-accept-remote
noccp
auth
mtu 1280
mru 1280
proxyarp
lcp-echo-failure 4
lcp-echo-interval 30
connect-delay 5000
ms-dns $DNS_SRV1
EOF
if [ -z "$VPN_DNS_SRV1" ] || [ -n "$VPN_DNS_SRV2" ]; then
cat >> /etc/ppp/options.xl2tpd <<EOF
ms-dns $DNS_SRV2
EOF
fi
# Create VPN credentials
conf_bk "/etc/ppp/chap-secrets"
cat > /etc/ppp/chap-secrets <<EOF
"$VPN_USER" l2tpd "$VPN_PASSWORD" *
EOF
conf_bk "/etc/ipsec.d/passwd"
VPN_PASSWORD_ENC=$(openssl passwd -1 "$VPN_PASSWORD")
cat > /etc/ipsec.d/passwd <<EOF
$VPN_USER:$VPN_PASSWORD_ENC:xauth-psk
EOF
}
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
# Added by hwdsl2 VPN script
kernel.msgmnb = 65536
kernel.msgmax = 65536
net.ipv4.ip_forward = 1
net.ipv4.conf.all.accept_redirects = 0
net.ipv4.conf.all.send_redirects = 0
net.ipv4.conf.all.rp_filter = 0
net.ipv4.conf.default.accept_redirects = 0
net.ipv4.conf.default.send_redirects = 0
net.ipv4.conf.default.rp_filter = 0
net.ipv4.conf.$NET_IFACE.send_redirects = 0
net.ipv4.conf.$NET_IFACE.rp_filter = 0
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
}
update_iptables() {
bigecho "Updating IPTables rules..."
IPT_FILE=/etc/iptables.rules
ipt_flag=0
if ! grep -qs "hwdsl2 VPN script" "$IPT_FILE"; then
ipt_flag=1
fi
ipi='iptables -I INPUT'
ipf='iptables -I FORWARD'
ipp='iptables -t nat -I POSTROUTING'
res='RELATED,ESTABLISHED'
if [ "$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
$ipi 2 -m conntrack --ctstate INVALID -j DROP
$ipi 3 -m conntrack --ctstate "$res" -j ACCEPT
$ipi 4 -p udp -m multiport --dports 500,4500 -j ACCEPT
$ipi 5 -p udp --dport 1701 -m policy --dir in --pol ipsec -j ACCEPT
$ipi 6 -p udp --dport 1701 -j DROP
$ipf 1 -m conntrack --ctstate INVALID -j DROP
$ipf 2 -i "$NET_IFACE" -o ppp+ -m conntrack --ctstate "$res" -j ACCEPT
$ipf 3 -i ppp+ -o "$NET_IFACE" -j ACCEPT
$ipf 4 -i ppp+ -o ppp+ -j ACCEPT
$ipf 5 -i "$NET_IFACE" -d "$XAUTH_NET" -m conntrack --ctstate "$res" -j ACCEPT
$ipf 6 -s "$XAUTH_NET" -o "$NET_IFACE" -j ACCEPT
$ipf 7 -s "$XAUTH_NET" -o ppp+ -j ACCEPT
iptables -A FORWARD -j DROP
$ipp -s "$XAUTH_NET" -o "$NET_IFACE" -m policy --dir out --pol none -j MASQUERADE
$ipp -s "$L2TP_NET" -o "$NET_IFACE" -j MASQUERADE
echo "# Modified by hwdsl2 VPN script" > "$IPT_FILE"
iptables-save >> "$IPT_FILE"
fi
}
enable_on_boot() {
bigecho "Enabling services on boot..."
mkdir -p /etc/network/if-pre-up.d
cat > /etc/network/if-pre-up.d/iptablesload <<'EOF'
#!/bin/sh
iptables-restore < /etc/iptables.rules
exit 0
EOF
chmod +x /etc/network/if-pre-up.d/iptablesload
for svc in fail2ban ipsec xl2tpd; do
rc-update add "$svc" >/dev/null
done
if ! grep -qs "hwdsl2 VPN script" /etc/rc.local; then
if [ -f /etc/rc.local ]; then
conf_bk "/etc/rc.local"
else
echo '#!/bin/sh' > /etc/rc.local
fi
cat >> /etc/rc.local <<'EOF'
# Added by hwdsl2 VPN script
(sleep 15
service ipsec restart
service xl2tpd restart
echo 1 > /proc/sys/net/ipv4/ip_forward)&
EOF
fi
}
start_services() {
bigecho "Starting services..."
sysctl -e -q -p
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 >/dev/null 2>&1
service ipsec restart >/dev/null 2>&1
service xl2tpd restart >/dev/null 2>&1
}
show_vpn_info() {
cat <<EOF
================================================
IPsec VPN server is now ready for use!
Connect to your new VPN with these details:
Server IP: $public_ip
IPsec PSK: $VPN_IPSEC_PSK
Username: $VPN_USER
Password: $VPN_PASSWORD
Write these down. You'll need them to connect!
Important notes: https://git.io/vpnnotes
Setup VPN clients: https://git.io/vpnclients
IKEv2 guide: https://git.io/ikev2
================================================
EOF
}
check_swan_ver() {
swan_ver_url="https://dl.ls20.com/v1/$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 "$1"
}
vpnsetup() {
check_root
check_vz
check_os
check_iface
check_creds
check_dns
start_setup
install_setup_pkgs
detect_ip
install_vpn_pkgs
install_fail2ban
get_ikev2_script
get_libreswan
install_libreswan
create_vpn_config
update_sysctl
update_iptables
enable_on_boot
start_services
show_vpn_info
}
## Defer setup until we have the complete script
vpnsetup "$@"
exit 0