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Improve customization

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- Use variables for easier customization of VPN subnets and DNS
- Other minor improvements
This commit is contained in:
hwdsl2 2017-02-11 21:36:37 -06:00
parent 03007079e6
commit 08e08c6924
2 changed files with 85 additions and 71 deletions
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77
vpnsetup.sh
View File

@ -39,7 +39,7 @@ SYS_DT="$(date +%Y-%m-%d-%H:%M:%S)"; export SYS_DT
exiterr() { echo "Error: $1" >&2; exit 1; } exiterr() { echo "Error: $1" >&2; exit 1; }
exiterr2() { echo "Error: 'apt-get install' failed." >&2; exit 1; } exiterr2() { echo "Error: 'apt-get install' failed." >&2; exit 1; }
conf_bk() { /bin/cp -f "$1" "$1.old-$SYS_DT" 2>/dev/null; } conf_bk() { /bin/cp -f "$1" "$1.old-$SYS_DT" 2>/dev/null; }
print_status() { echo; echo "## $1"; echo; } bigecho() { echo; echo "## $1"; echo; }
check_ip() { check_ip() {
IP_REGEX="^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$" 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])$"
@ -66,7 +66,6 @@ fi
NET_IF0=${VPN_IFACE:-'eth0'} NET_IF0=${VPN_IFACE:-'eth0'}
NET_IFS=${VPN_IFACE:-'eth+'} NET_IFS=${VPN_IFACE:-'eth+'}
if_state=$(cat "/sys/class/net/$NET_IF0/operstate" 2>/dev/null) if_state=$(cat "/sys/class/net/$NET_IF0/operstate" 2>/dev/null)
if [ -z "$if_state" ] || [ "$if_state" = "down" ] || [ "$NET_IF0" = "lo" ]; then if [ -z "$if_state" ] || [ "$if_state" = "down" ] || [ "$NET_IF0" = "lo" ]; then
echo "Error: Network interface '$NET_IF0' is not available." >&2 echo "Error: Network interface '$NET_IF0' is not available." >&2
@ -89,7 +88,7 @@ fi
[ -n "$YOUR_PASSWORD" ] && VPN_PASSWORD="$YOUR_PASSWORD" [ -n "$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 "$VPN_PASSWORD" ]; then
print_status "VPN credentials not set by user. Generating random PSK and password..." bigecho "VPN credentials not set by user. Generating random PSK and password..."
VPN_IPSEC_PSK="$(LC_CTYPE=C tr -dc 'A-HJ-NPR-Za-km-z2-9' < /dev/urandom | head -c 16)" VPN_IPSEC_PSK="$(LC_CTYPE=C tr -dc 'A-HJ-NPR-Za-km-z2-9' < /dev/urandom | head -c 16)"
VPN_USER=vpnuser VPN_USER=vpnuser
VPN_PASSWORD="$(LC_CTYPE=C tr -dc 'A-HJ-NPR-Za-km-z2-9' < /dev/urandom | head -c 16)" VPN_PASSWORD="$(LC_CTYPE=C tr -dc 'A-HJ-NPR-Za-km-z2-9' < /dev/urandom | head -c 16)"
@ -117,30 +116,30 @@ EOF
sleep 30 sleep 30
fi fi
print_status "VPN setup in progress... Please be patient." bigecho "VPN setup in progress... Please be patient."
# Create and change to working dir # Create and change to working dir
mkdir -p /opt/src mkdir -p /opt/src
cd /opt/src || exiterr "Cannot enter /opt/src." cd /opt/src || exiterr "Cannot enter /opt/src."
print_status "Populating apt-get cache..." bigecho "Populating apt-get cache..."
export DEBIAN_FRONTEND=noninteractive export DEBIAN_FRONTEND=noninteractive
apt-get -yq update || exiterr "'apt-get update' failed." apt-get -yq update || exiterr "'apt-get update' failed."
print_status "Installing packages required for setup..." bigecho "Installing packages required for setup..."
apt-get -yq install wget dnsutils openssl || exiterr2 apt-get -yq install wget dnsutils openssl || exiterr2
apt-get -yq install iproute gawk grep sed net-tools || exiterr2 apt-get -yq install iproute gawk grep sed net-tools || exiterr2
print_status "Trying to auto discover IP of this server..." bigecho "Trying to auto discover IP of this server..."
cat <<'EOF' cat <<'EOF'
In case the script hangs here for more than a few minutes, In case the script hangs here for more than a few minutes,
use Ctrl-C to interrupt. Then edit it and manually enter IP. use Ctrl-C to interrupt. Then edit it and manually enter IP.
EOF EOF
# In case auto IP discovery fails, enter this server's public IP here. # In case auto IP discovery fails, enter server's public IP here.
PUBLIC_IP=${VPN_PUBLIC_IP:-''} PUBLIC_IP=${VPN_PUBLIC_IP:-''}
# Try to auto discover IP of this server # Try to auto discover IP of this server
@ -150,7 +149,7 @@ PUBLIC_IP=${VPN_PUBLIC_IP:-''}
check_ip "$PUBLIC_IP" || PUBLIC_IP=$(wget -t 3 -T 15 -qO- http://ipv4.icanhazip.com) check_ip "$PUBLIC_IP" || PUBLIC_IP=$(wget -t 3 -T 15 -qO- http://ipv4.icanhazip.com)
check_ip "$PUBLIC_IP" || exiterr "Cannot find valid public IP. Edit the script and manually enter it." check_ip "$PUBLIC_IP" || exiterr "Cannot find valid public IP. Edit the script and manually enter it."
print_status "Installing packages required for the VPN..." bigecho "Installing packages required for the VPN..."
apt-get -yq install libnss3-dev libnspr4-dev pkg-config libpam0g-dev \ apt-get -yq install libnss3-dev libnspr4-dev pkg-config libpam0g-dev \
libcap-ng-dev libcap-ng-utils libselinux1-dev \ libcap-ng-dev libcap-ng-utils libselinux1-dev \
@ -159,11 +158,11 @@ apt-get -yq install libnss3-dev libnspr4-dev pkg-config libpam0g-dev \
apt-get -yq --no-install-recommends install xmlto || exiterr2 apt-get -yq --no-install-recommends install xmlto || exiterr2
apt-get -yq install ppp xl2tpd || exiterr2 apt-get -yq install ppp xl2tpd || exiterr2
print_status "Installing Fail2Ban to protect SSH..." bigecho "Installing Fail2Ban to protect SSH..."
apt-get -yq install fail2ban || exiterr2 apt-get -yq install fail2ban || exiterr2
print_status "Compiling and installing Libreswan..." bigecho "Compiling and installing Libreswan..."
swan_ver=3.19 swan_ver=3.19
swan_file="libreswan-$swan_ver.tar.gz" swan_file="libreswan-$swan_ver.tar.gz"
@ -188,7 +187,15 @@ if ! /usr/local/sbin/ipsec --version 2>/dev/null | grep -qs -F "$swan_ver"; then
exiterr "Libreswan $swan_ver failed to build." exiterr "Libreswan $swan_ver failed to build."
fi fi
print_status "Creating VPN configuration..." bigecho "Creating VPN configuration..."
L2TP_NET=${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'}
# Create IPsec (Libreswan) config # Create IPsec (Libreswan) config
conf_bk "/etc/ipsec.conf" conf_bk "/etc/ipsec.conf"
@ -196,7 +203,7 @@ cat > /etc/ipsec.conf <<EOF
version 2.0 version 2.0
config setup config setup
virtual_private=%v4:10.0.0.0/8,%v4:192.168.0.0/16,%v4:172.16.0.0/12,%v4:!192.168.42.0/23 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
protostack=netkey protostack=netkey
nhelpers=0 nhelpers=0
interfaces=%defaultroute interfaces=%defaultroute
@ -229,9 +236,9 @@ conn l2tp-psk
conn xauth-psk conn xauth-psk
auto=add auto=add
leftsubnet=0.0.0.0/0 leftsubnet=0.0.0.0/0
rightaddresspool=192.168.43.10-192.168.43.250 rightaddresspool=$XAUTH_POOL
modecfgdns1=8.8.8.8 modecfgdns1=$DNS_SRV1
modecfgdns2=8.8.4.4 modecfgdns2=$DNS_SRV2
leftxauthserver=yes leftxauthserver=yes
rightxauthclient=yes rightxauthclient=yes
leftmodecfgserver=yes leftmodecfgserver=yes
@ -252,13 +259,13 @@ EOF
# Create xl2tpd config # Create xl2tpd config
conf_bk "/etc/xl2tpd/xl2tpd.conf" conf_bk "/etc/xl2tpd/xl2tpd.conf"
cat > /etc/xl2tpd/xl2tpd.conf <<'EOF' cat > /etc/xl2tpd/xl2tpd.conf <<EOF
[global] [global]
port = 1701 port = 1701
[lns default] [lns default]
ip range = 192.168.42.10-192.168.42.250 ip range = $L2TP_POOL
local ip = 192.168.42.1 local ip = $L2TP_LOCAL
require chap = yes require chap = yes
refuse pap = yes refuse pap = yes
require authentication = yes require authentication = yes
@ -269,11 +276,11 @@ EOF
# Set xl2tpd options # Set xl2tpd options
conf_bk "/etc/ppp/options.xl2tpd" conf_bk "/etc/ppp/options.xl2tpd"
cat > /etc/ppp/options.xl2tpd <<'EOF' cat > /etc/ppp/options.xl2tpd <<EOF
ipcp-accept-local ipcp-accept-local
ipcp-accept-remote ipcp-accept-remote
ms-dns 8.8.8.8 ms-dns $DNS_SRV1
ms-dns 8.8.4.4 ms-dns $DNS_SRV2
noccp noccp
auth auth
mtu 1280 mtu 1280
@ -298,7 +305,7 @@ cat > /etc/ipsec.d/passwd <<EOF
$VPN_USER:$VPN_PASSWORD_ENC:xauth-psk $VPN_USER:$VPN_PASSWORD_ENC:xauth-psk
EOF EOF
print_status "Updating sysctl settings..." bigecho "Updating sysctl settings..."
if ! grep -qs "hwdsl2 VPN script" /etc/sysctl.conf; then if ! grep -qs "hwdsl2 VPN script" /etc/sysctl.conf; then
conf_bk "/etc/sysctl.conf" conf_bk "/etc/sysctl.conf"
@ -334,14 +341,14 @@ net.ipv4.tcp_wmem = 10240 87380 12582912
EOF EOF
fi fi
print_status "Updating IPTables rules..." bigecho "Updating IPTables rules..."
# Check if IPTables rules need updating # Check if IPTables rules need updating
ipt_flag=0 ipt_flag=0
IPT_FILE="/etc/iptables.rules" IPT_FILE="/etc/iptables.rules"
if ! grep -qs "hwdsl2 VPN script" "$IPT_FILE" \ if ! grep -qs "hwdsl2 VPN script" "$IPT_FILE" \
|| ! iptables -t nat -C POSTROUTING -s 192.168.42.0/24 -o "$NET_IFS" -j MASQUERADE 2>/dev/null \ || ! iptables -t nat -C POSTROUTING -s "$L2TP_NET" -o "$NET_IFS" -j MASQUERADE 2>/dev/null \
|| ! iptables -t nat -C POSTROUTING -s 192.168.43.0/24 -o "$NET_IFS" -m policy --dir out --pol none -j MASQUERADE 2>/dev/null; then || ! iptables -t nat -C POSTROUTING -s "$XAUTH_NET" -o "$NET_IFS" -m policy --dir out --pol none -j MASQUERADE 2>/dev/null; then
ipt_flag=1 ipt_flag=1
fi fi
@ -357,15 +364,15 @@ if [ "$ipt_flag" = "1" ]; then
iptables -I FORWARD 1 -m conntrack --ctstate INVALID -j DROP iptables -I FORWARD 1 -m conntrack --ctstate INVALID -j DROP
iptables -I FORWARD 2 -i "$NET_IFS" -o ppp+ -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT iptables -I FORWARD 2 -i "$NET_IFS" -o ppp+ -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
iptables -I FORWARD 3 -i ppp+ -o "$NET_IFS" -j ACCEPT iptables -I FORWARD 3 -i ppp+ -o "$NET_IFS" -j ACCEPT
iptables -I FORWARD 4 -i ppp+ -o ppp+ -s 192.168.42.0/24 -d 192.168.42.0/24 -j ACCEPT iptables -I FORWARD 4 -i ppp+ -o ppp+ -s "$L2TP_NET" -d "$L2TP_NET" -j ACCEPT
iptables -I FORWARD 5 -i "$NET_IFS" -d 192.168.43.0/24 -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT iptables -I FORWARD 5 -i "$NET_IFS" -d "$XAUTH_NET" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
iptables -I FORWARD 6 -s 192.168.43.0/24 -o "$NET_IFS" -j ACCEPT iptables -I FORWARD 6 -s "$XAUTH_NET" -o "$NET_IFS" -j ACCEPT
# Uncomment if you wish to disallow traffic between VPN clients themselves # Uncomment if you wish to disallow traffic between VPN clients themselves
# iptables -I FORWARD 2 -i ppp+ -o ppp+ -s 192.168.42.0/24 -d 192.168.42.0/24 -j DROP # iptables -I FORWARD 2 -i ppp+ -o ppp+ -s "$L2TP_NET" -d "$L2TP_NET" -j DROP
# iptables -I FORWARD 3 -s 192.168.43.0/24 -d 192.168.43.0/24 -j DROP # iptables -I FORWARD 3 -s "$XAUTH_NET" -d "$XAUTH_NET" -j DROP
iptables -A FORWARD -j DROP iptables -A FORWARD -j DROP
iptables -t nat -I POSTROUTING -s 192.168.43.0/24 -o "$NET_IFS" -m policy --dir out --pol none -j MASQUERADE iptables -t nat -I POSTROUTING -s "$XAUTH_NET" -o "$NET_IFS" -m policy --dir out --pol none -j MASQUERADE
iptables -t nat -I POSTROUTING -s 192.168.42.0/24 -o "$NET_IFS" -j MASQUERADE iptables -t nat -I POSTROUTING -s "$L2TP_NET" -o "$NET_IFS" -j MASQUERADE
echo "# Modified by hwdsl2 VPN script" > "$IPT_FILE" echo "# Modified by hwdsl2 VPN script" > "$IPT_FILE"
iptables-save >> "$IPT_FILE" iptables-save >> "$IPT_FILE"
@ -377,7 +384,7 @@ if [ "$ipt_flag" = "1" ]; then
fi fi
fi fi
print_status "Enabling services on boot..." bigecho "Enabling services on boot..."
mkdir -p /etc/network/if-pre-up.d mkdir -p /etc/network/if-pre-up.d
cat > /etc/network/if-pre-up.d/iptablesload <<'EOF' cat > /etc/network/if-pre-up.d/iptablesload <<'EOF'
@ -410,7 +417,7 @@ EOF
fi fi
fi fi
print_status "Starting services..." bigecho "Starting services..."
# Reload sysctl.conf # Reload sysctl.conf
sysctl -e -q -p sysctl -e -q -p

79
vpnsetup_centos.sh
View File

@ -39,7 +39,7 @@ SYS_DT="$(date +%Y-%m-%d-%H:%M:%S)"; export SYS_DT
exiterr() { echo "Error: $1" >&2; exit 1; } exiterr() { echo "Error: $1" >&2; exit 1; }
exiterr2() { echo "Error: 'yum install' failed." >&2; exit 1; } exiterr2() { echo "Error: 'yum install' failed." >&2; exit 1; }
conf_bk() { /bin/cp -f "$1" "$1.old-$SYS_DT" 2>/dev/null; } conf_bk() { /bin/cp -f "$1" "$1.old-$SYS_DT" 2>/dev/null; }
print_status() { echo; echo "## $1"; echo; } bigecho() { echo; echo "## $1"; echo; }
check_ip() { check_ip() {
IP_REGEX="^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$" 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])$"
@ -62,7 +62,6 @@ fi
NET_IF0=${VPN_IFACE:-'eth0'} NET_IF0=${VPN_IFACE:-'eth0'}
NET_IFS=${VPN_IFACE:-'eth+'} NET_IFS=${VPN_IFACE:-'eth+'}
if_state=$(cat "/sys/class/net/$NET_IF0/operstate" 2>/dev/null) if_state=$(cat "/sys/class/net/$NET_IF0/operstate" 2>/dev/null)
if [ -z "$if_state" ] || [ "$if_state" = "down" ] || [ "$NET_IF0" = "lo" ]; then if [ -z "$if_state" ] || [ "$if_state" = "down" ] || [ "$NET_IF0" = "lo" ]; then
echo "Error: Network interface '$NET_IF0' is not available." >&2 echo "Error: Network interface '$NET_IF0' is not available." >&2
@ -85,7 +84,7 @@ fi
[ -n "$YOUR_PASSWORD" ] && VPN_PASSWORD="$YOUR_PASSWORD" [ -n "$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 "$VPN_PASSWORD" ]; then
print_status "VPN credentials not set by user. Generating random PSK and password..." bigecho "VPN credentials not set by user. Generating random PSK and password..."
VPN_IPSEC_PSK="$(LC_CTYPE=C tr -dc 'A-HJ-NPR-Za-km-z2-9' < /dev/urandom | head -c 16)" VPN_IPSEC_PSK="$(LC_CTYPE=C tr -dc 'A-HJ-NPR-Za-km-z2-9' < /dev/urandom | head -c 16)"
VPN_USER=vpnuser VPN_USER=vpnuser
VPN_PASSWORD="$(LC_CTYPE=C tr -dc 'A-HJ-NPR-Za-km-z2-9' < /dev/urandom | head -c 16)" VPN_PASSWORD="$(LC_CTYPE=C tr -dc 'A-HJ-NPR-Za-km-z2-9' < /dev/urandom | head -c 16)"
@ -101,25 +100,25 @@ case "$VPN_IPSEC_PSK $VPN_USER $VPN_PASSWORD" in
;; ;;
esac esac
print_status "VPN setup in progress... Please be patient." bigecho "VPN setup in progress... Please be patient."
# Create and change to working dir # Create and change to working dir
mkdir -p /opt/src mkdir -p /opt/src
cd /opt/src || exiterr "Cannot enter /opt/src." cd /opt/src || exiterr "Cannot enter /opt/src."
print_status "Installing packages required for setup..." bigecho "Installing packages required for setup..."
yum -y install wget bind-utils openssl || exiterr2 yum -y install wget bind-utils openssl || exiterr2
yum -y install iproute gawk grep sed net-tools || exiterr2 yum -y install iproute gawk grep sed net-tools || exiterr2
print_status "Trying to auto discover IP of this server..." bigecho "Trying to auto discover IP of this server..."
cat <<'EOF' cat <<'EOF'
In case the script hangs here for more than a few minutes, In case the script hangs here for more than a few minutes,
use Ctrl-C to interrupt. Then edit it and manually enter IP. use Ctrl-C to interrupt. Then edit it and manually enter IP.
EOF EOF
# In case auto IP discovery fails, enter this server's public IP here. # In case auto IP discovery fails, enter server's public IP here.
PUBLIC_IP=${VPN_PUBLIC_IP:-''} PUBLIC_IP=${VPN_PUBLIC_IP:-''}
# Try to auto discover IP of this server # Try to auto discover IP of this server
@ -129,11 +128,11 @@ PUBLIC_IP=${VPN_PUBLIC_IP:-''}
check_ip "$PUBLIC_IP" || PUBLIC_IP=$(wget -t 3 -T 15 -qO- http://ipv4.icanhazip.com) check_ip "$PUBLIC_IP" || PUBLIC_IP=$(wget -t 3 -T 15 -qO- http://ipv4.icanhazip.com)
check_ip "$PUBLIC_IP" || exiterr "Cannot find valid public IP. Edit the script and manually enter it." check_ip "$PUBLIC_IP" || exiterr "Cannot find valid public IP. Edit the script and manually enter it."
print_status "Adding the EPEL repository..." bigecho "Adding the EPEL repository..."
yum -y install epel-release || exiterr2 yum -y install epel-release || exiterr2
print_status "Installing packages required for the VPN..." bigecho "Installing packages required for the VPN..."
yum -y install nss-devel nspr-devel pkgconfig pam-devel \ yum -y install nss-devel nspr-devel pkgconfig pam-devel \
libcap-ng-devel libselinux-devel \ libcap-ng-devel libselinux-devel \
@ -149,11 +148,11 @@ else
yum -y install iptables-services || exiterr2 yum -y install iptables-services || exiterr2
fi fi
print_status "Installing Fail2Ban to protect SSH..." bigecho "Installing Fail2Ban to protect SSH..."
yum -y install fail2ban || exiterr2 yum -y install fail2ban || exiterr2
print_status "Compiling and installing Libreswan..." bigecho "Compiling and installing Libreswan..."
swan_ver=3.19 swan_ver=3.19
swan_file="libreswan-$swan_ver.tar.gz" swan_file="libreswan-$swan_ver.tar.gz"
@ -175,7 +174,15 @@ if ! /usr/local/sbin/ipsec --version 2>/dev/null | grep -qs -F "$swan_ver"; then
exiterr "Libreswan $swan_ver failed to build." exiterr "Libreswan $swan_ver failed to build."
fi fi
print_status "Creating VPN configuration..." bigecho "Creating VPN configuration..."
L2TP_NET=${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'}
# Create IPsec (Libreswan) config # Create IPsec (Libreswan) config
conf_bk "/etc/ipsec.conf" conf_bk "/etc/ipsec.conf"
@ -183,7 +190,7 @@ cat > /etc/ipsec.conf <<EOF
version 2.0 version 2.0
config setup config setup
virtual_private=%v4:10.0.0.0/8,%v4:192.168.0.0/16,%v4:172.16.0.0/12,%v4:!192.168.42.0/23 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
protostack=netkey protostack=netkey
nhelpers=0 nhelpers=0
interfaces=%defaultroute interfaces=%defaultroute
@ -216,9 +223,9 @@ conn l2tp-psk
conn xauth-psk conn xauth-psk
auto=add auto=add
leftsubnet=0.0.0.0/0 leftsubnet=0.0.0.0/0
rightaddresspool=192.168.43.10-192.168.43.250 rightaddresspool=$XAUTH_POOL
modecfgdns1=8.8.8.8 modecfgdns1=$DNS_SRV1
modecfgdns2=8.8.4.4 modecfgdns2=$DNS_SRV2
leftxauthserver=yes leftxauthserver=yes
rightxauthclient=yes rightxauthclient=yes
leftmodecfgserver=yes leftmodecfgserver=yes
@ -239,13 +246,13 @@ EOF
# Create xl2tpd config # Create xl2tpd config
conf_bk "/etc/xl2tpd/xl2tpd.conf" conf_bk "/etc/xl2tpd/xl2tpd.conf"
cat > /etc/xl2tpd/xl2tpd.conf <<'EOF' cat > /etc/xl2tpd/xl2tpd.conf <<EOF
[global] [global]
port = 1701 port = 1701
[lns default] [lns default]
ip range = 192.168.42.10-192.168.42.250 ip range = $L2TP_POOL
local ip = 192.168.42.1 local ip = $L2TP_LOCAL
require chap = yes require chap = yes
refuse pap = yes refuse pap = yes
require authentication = yes require authentication = yes
@ -256,11 +263,11 @@ EOF
# Set xl2tpd options # Set xl2tpd options
conf_bk "/etc/ppp/options.xl2tpd" conf_bk "/etc/ppp/options.xl2tpd"
cat > /etc/ppp/options.xl2tpd <<'EOF' cat > /etc/ppp/options.xl2tpd <<EOF
ipcp-accept-local ipcp-accept-local
ipcp-accept-remote ipcp-accept-remote
ms-dns 8.8.8.8 ms-dns $DNS_SRV1
ms-dns 8.8.4.4 ms-dns $DNS_SRV2
noccp noccp
auth auth
mtu 1280 mtu 1280
@ -285,7 +292,7 @@ cat > /etc/ipsec.d/passwd <<EOF
$VPN_USER:$VPN_PASSWORD_ENC:xauth-psk $VPN_USER:$VPN_PASSWORD_ENC:xauth-psk
EOF EOF
print_status "Updating sysctl settings..." bigecho "Updating sysctl settings..."
if ! grep -qs "hwdsl2 VPN script" /etc/sysctl.conf; then if ! grep -qs "hwdsl2 VPN script" /etc/sysctl.conf; then
conf_bk "/etc/sysctl.conf" conf_bk "/etc/sysctl.conf"
@ -321,14 +328,14 @@ net.ipv4.tcp_wmem = 10240 87380 12582912
EOF EOF
fi fi
print_status "Updating IPTables rules..." bigecho "Updating IPTables rules..."
# Check if IPTables rules need updating # Check if IPTables rules need updating
ipt_flag=0 ipt_flag=0
IPT_FILE="/etc/sysconfig/iptables" IPT_FILE="/etc/sysconfig/iptables"
if ! grep -qs "hwdsl2 VPN script" "$IPT_FILE" \ if ! grep -qs "hwdsl2 VPN script" "$IPT_FILE" \
|| ! iptables -t nat -C POSTROUTING -s 192.168.42.0/24 -o "$NET_IFS" -j MASQUERADE 2>/dev/null \ || ! iptables -t nat -C POSTROUTING -s "$L2TP_NET" -o "$NET_IFS" -j MASQUERADE 2>/dev/null \
|| ! iptables -t nat -C POSTROUTING -s 192.168.43.0/24 -o "$NET_IFS" -m policy --dir out --pol none -j MASQUERADE 2>/dev/null; then || ! iptables -t nat -C POSTROUTING -s "$XAUTH_NET" -o "$NET_IFS" -m policy --dir out --pol none -j MASQUERADE 2>/dev/null; then
ipt_flag=1 ipt_flag=1
fi fi
@ -344,20 +351,20 @@ if [ "$ipt_flag" = "1" ]; then
iptables -I FORWARD 1 -m conntrack --ctstate INVALID -j DROP iptables -I FORWARD 1 -m conntrack --ctstate INVALID -j DROP
iptables -I FORWARD 2 -i "$NET_IFS" -o ppp+ -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT iptables -I FORWARD 2 -i "$NET_IFS" -o ppp+ -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
iptables -I FORWARD 3 -i ppp+ -o "$NET_IFS" -j ACCEPT iptables -I FORWARD 3 -i ppp+ -o "$NET_IFS" -j ACCEPT
iptables -I FORWARD 4 -i ppp+ -o ppp+ -s 192.168.42.0/24 -d 192.168.42.0/24 -j ACCEPT iptables -I FORWARD 4 -i ppp+ -o ppp+ -s "$L2TP_NET" -d "$L2TP_NET" -j ACCEPT
iptables -I FORWARD 5 -i "$NET_IFS" -d 192.168.43.0/24 -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT iptables -I FORWARD 5 -i "$NET_IFS" -d "$XAUTH_NET" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
iptables -I FORWARD 6 -s 192.168.43.0/24 -o "$NET_IFS" -j ACCEPT iptables -I FORWARD 6 -s "$XAUTH_NET" -o "$NET_IFS" -j ACCEPT
# Uncomment if you wish to disallow traffic between VPN clients themselves # Uncomment if you wish to disallow traffic between VPN clients themselves
# iptables -I FORWARD 2 -i ppp+ -o ppp+ -s 192.168.42.0/24 -d 192.168.42.0/24 -j DROP # iptables -I FORWARD 2 -i ppp+ -o ppp+ -s "$L2TP_NET" -d "$L2TP_NET" -j DROP
# iptables -I FORWARD 3 -s 192.168.43.0/24 -d 192.168.43.0/24 -j DROP # iptables -I FORWARD 3 -s "$XAUTH_NET" -d "$XAUTH_NET" -j DROP
iptables -A FORWARD -j DROP iptables -A FORWARD -j DROP
iptables -t nat -I POSTROUTING -s 192.168.43.0/24 -o "$NET_IFS" -m policy --dir out --pol none -j MASQUERADE iptables -t nat -I POSTROUTING -s "$XAUTH_NET" -o "$NET_IFS" -m policy --dir out --pol none -j MASQUERADE
iptables -t nat -I POSTROUTING -s 192.168.42.0/24 -o "$NET_IFS" -j MASQUERADE iptables -t nat -I POSTROUTING -s "$L2TP_NET" -o "$NET_IFS" -j MASQUERADE
echo "# Modified by hwdsl2 VPN script" > "$IPT_FILE" echo "# Modified by hwdsl2 VPN script" > "$IPT_FILE"
iptables-save >> "$IPT_FILE" iptables-save >> "$IPT_FILE"
fi fi
print_status "Creating basic Fail2Ban rules..." bigecho "Creating basic Fail2Ban rules..."
if [ ! -f /etc/fail2ban/jail.local ] ; then if [ ! -f /etc/fail2ban/jail.local ] ; then
cat > /etc/fail2ban/jail.local <<'EOF' cat > /etc/fail2ban/jail.local <<'EOF'
@ -369,7 +376,7 @@ logpath = /var/log/secure
EOF EOF
fi fi
print_status "Enabling services on boot..." bigecho "Enabling services on boot..."
if grep -qs "release 6" /etc/redhat-release; then if grep -qs "release 6" /etc/redhat-release; then
chkconfig iptables on chkconfig iptables on
@ -394,7 +401,7 @@ echo 1 > /proc/sys/net/ipv4/ip_forward
EOF EOF
fi fi
print_status "Starting services..." bigecho "Starting services..."
# Restore SELinux contexts # Restore SELinux contexts
restorecon /etc/ipsec.d/*db 2>/dev/null restorecon /etc/ipsec.d/*db 2>/dev/null