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Teddysun 2019-11-23 13:54:54 +09:00
parent 5778cd21c8
commit f32e8cf63a
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3
docker/l2tp/.dockerignore
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@ -1,3 +0,0 @@
.dockerignore
README.md
l2tp.env

21
docker/l2tp/Dockerfile
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@ -1,21 +1,16 @@
# Dockerfile for L2TP/IPSec VPN Server
# Dockerfile for L2TP/IPSec VPN Server based alpine
# Copyright (C) 2018 - 2019 Teddysun <i@teddysun.com>
FROM debian:buster
FROM alpine:edge
LABEL maintainer="Teddysun <i@teddysun.com>"
RUN set -ex \
&& printf "deb http://deb.debian.org/debian sid main" > /etc/apt/sources.list.d/sid.list \
&& apt-get update \
&& apt-get -t sid install -y --no-install-recommends libreswan xl2tpd \
&& apt-get install -y --no-install-recommends wget iproute2 openssl ca-certificates kmod net-tools iptables \
&& apt-get -y autoremove \
&& apt-get -y clean \
&& rm -rf /var/lib/apt/lists/*
RUN apk add -U openssl libreswan xl2tpd ppp-l2tp \
&& ipsec initnss \
&& rm -rf /var/cache/apk/*
COPY ./ipsec /etc/init.d/ipsec
COPY ./l2tp.sh /usr/bin/l2tp
COPY ./l2tpctl.sh /usr/bin/l2tpctl
COPY ipsec /etc/init.d/ipsec
COPY l2tp.sh /usr/bin/l2tp
COPY l2tpctl.sh /usr/bin/l2tpctl
RUN chmod 755 /etc/init.d/ipsec /usr/bin/l2tp /usr/bin/l2tpctl
VOLUME /lib/modules

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docker/l2tp/README.md
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@ -2,9 +2,7 @@
Docker image to run a L2TP/IPsec VPN Server, with both `L2TP/IPsec PSK` and `IPSec Xauth PSK`.
1. Based on Debian 10 (Buster) with [libreswan-3.29 (IPsec VPN software)](https://packages.debian.org/sid/libreswan) and [xl2tpd-1.3.12 (L2TP daemon)](https://packages.debian.org/sid/xl2tpd).
2. Based on Alpine with [libreswan-3.29 (IPsec VPN software)](https://pkgs.alpinelinux.org/package/edge/community/x86_64/libreswan) and [xl2tpd-1.3.15 (L2TP daemon)](https://pkgs.alpinelinux.org/package/edge/main/x86_64/xl2tpd).
Based on Alpine with [libreswan-3.29 (IPsec VPN software)](https://pkgs.alpinelinux.org/package/edge/community/x86_64/libreswan) and [xl2tpd-1.3.15 (L2TP daemon)](https://pkgs.alpinelinux.org/package/edge/main/x86_64/xl2tpd).
Docker images are built for quick deployment in various computing cloud providers.
@ -45,6 +43,7 @@ VPN_XAUTH_NET=
VPN_XAUTH_REMOTE=
VPN_DNS1=
VPN_DNS2=
VPN_SHA2_TRUNCBUG=
```
This will create a default user account for L2TP/IPsec VPN login, which can be used by your **multiple devices**.
@ -69,18 +68,14 @@ If you want to specify a `rightaddresspool` for `ipsec.conf`, maybe need to spec
If you want to specify a other DNS servers, maybe need to specified in `VPN_DNS1` and `VPN_DNS2` (default `8.8.8.8`, `8.8.4.4`).
**Android 6 and 7 users**: If you encounter connection issues, you may set `sha2-truncbug=yes` (default is no) in `/etc/ipsec.conf` by adding `VPN_SHA2_TRUNCBUG=yes` to `/etc/l2tp.env` file, then re-create the Docker container.
There is an example to start a container:
```bash
$ docker run -d --privileged -p 500:500/udp -p 4500:4500/udp --name l2tp --restart=always --env-file /etc/l2tp.env -v /lib/modules:/lib/modules teddysun/l2tp
```
or start a container with tag **alpine**
```bash
$ docker run -d --privileged -p 500:500/udp -p 4500:4500/udp --name l2tp --restart=always --env-file /etc/l2tp.env -v /lib/modules:/lib/modules teddysun/l2tp:alpine
```
**Warning**: The UDP port number `500` and `4500` must be opened in firewall.
## Check container details
@ -106,7 +101,7 @@ Starting pluto IKE daemon for IPsec: Initializing NSS database
xl2tpd[1]: Not looking for kernel SAref support.
xl2tpd[1]: Using l2tp kernel support.
xl2tpd[1]: xl2tpd version xl2tpd-1.3.12 started on 1d20eaecd9f2 PID:1
xl2tpd[1]: xl2tpd version xl2tpd-1.3.15 started on 1d20eaecd9f2 PID:1
xl2tpd[1]: Written by Mark Spencer, Copyright (C) 1998, Adtran, Inc.
xl2tpd[1]: Forked by Scott Balmos and David Stipp, (C) 2001
xl2tpd[1]: Inherited by Jeff McAdams, (C) 2002

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.dockerignore
l2tp.env

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docker/l2tp/alpine/Dockerfile
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# Dockerfile for L2TP/IPSec VPN Server based alpine
# Copyright (C) 2018 - 2019 Teddysun <i@teddysun.com>
FROM alpine:edge
LABEL maintainer="Teddysun <i@teddysun.com>"
RUN apk add -U openssl libreswan xl2tpd ppp-l2tp \
&& ipsec initnss \
&& rm -rf /var/cache/apk/*
COPY ipsec /etc/init.d/ipsec
COPY l2tp.sh /usr/bin/l2tp
COPY l2tpctl.sh /usr/bin/l2tpctl
RUN chmod 755 /etc/init.d/ipsec /usr/bin/l2tp /usr/bin/l2tpctl
VOLUME /lib/modules
EXPOSE 500/udp 4500/udp
CMD [ "l2tp" ]

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#!/bin/sh
# IPsec startup and shutdown script
#
### BEGIN INIT INFO
# Provides: ipsec
# Required-Start: $network $remote_fs $syslog $named
# Required-Stop: $syslog $remote_fs
# Default-Start:
# Default-Stop: 0 1 6
# Short-Description: Start Libreswan IPsec at boot time
# Description: Enable automatic key management for IPsec (KLIPS and NETKEY)
### END INIT INFO
#
### see https://bugzilla.redhat.com/show_bug.cgi?id=636572
### Debian and Fedora interpret the LSB differently for Default-Start:
# Copyright (C) 1998, 1999, 2001 Henry Spencer.
# Copyright (C) 2002 Michael Richardson <mcr@freeswan.org>
# Copyright (C) 2006 Michael Richardson <mcr@xelerance.com>
# Copyright (C) 2008 Michael Richardson <mcr@sandelman.ca>
# Copyright (C) 2008-2015 Tuomo Soini <tis@foobar.fi>
# Copyright (C) 2012 Paul Wouters <paul@libreswan.org>
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 2 of the License, or (at your
# option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
# for more details.
#
# ipsec sysv style init.d script for starting and stopping
# the IPsec security subsystem (KLIPS and Pluto).
#
# This script becomes /etc/init.d/ipsec
# and is also accessible as "ipsec setup"
#
# The startup and shutdown times are a difficult compromise (in particular,
# it is almost impossible to reconcile them with the insanely early/late
# times of NFS filesystem startup/shutdown). Startup is after startup of
# syslog and pcmcia support; shutdown is just before shutdown of syslog.
#
# chkconfig: - 47 76
# description: IPsec provides encrypted and authenticated communications; \
# NETKEY/KLIPS is the kernel half of it, Pluto is the user-level management daemon.
test ${IPSEC_INIT_SCRIPT_DEBUG} && set -v -x
# Source function library.
if [ -f /etc/init.d/functions ]; then
. /etc/init.d/functions
elif [ -f /lib/lsb/init-functions ]; then
. /lib/lsb/init-functions
fi
# Check that networking is up.
[ "${NETWORKING}" = "no" ] && exit 6
if [ $(id -u) -ne 0 ]; then
echo "permission denied (must be superuser)" | \
logger -s -p daemon.error -t ipsec_setup 2>&1
exit 4
fi
if [ $(ip addr list | grep -c cipsec) -ne 0 ]; then
echo "Cisco IPsec client is already loaded, aborting! (cipsec# device found)"
exit 1
fi
# where the private directory and the config files are
IPSEC_CONF="${IPSEC_CONF:-/etc/ipsec.conf}"
IPSEC_EXECDIR="${IPSEC_EXECDIR:-/usr/lib/ipsec}"
IPSEC_SBINDIR="${IPSEC_SBINDIR:-/usr/sbin}"
unset PLUTO_OPTIONS
rundir=/var/run/pluto
plutopid=${rundir}/pluto.pid
plutoctl=${rundir}/pluto.ctl
lockdir=/var/lock/subsys
lockfile=${lockdir}/ipsec
ipsecversion=/proc/net/ipsec_version
kamepfkey=/proc/net/pfkey
# /etc/resolv.conf related paths
LIBRESWAN_RESOLV_CONF=${rundir}/libreswan-resolv-conf-backup
ORIG_RESOLV_CONF=/etc/resolv.conf
# there is some confusion over the name - just do both
[ -f /etc/sysconfig/ipsec ] && . /etc/sysconfig/ipsec
[ -f /etc/sysconfig/pluto ] && . /etc/sysconfig/pluto
# misc setup
umask 022
# standardize PATH, and export it for everything else's benefit
PATH="${IPSEC_SBINDIR}:/sbin:/usr/sbin:/usr/local/bin:/bin:/usr/bin"
export PATH
mkdir -p ${rundir}
chmod 700 ${rundir}
verify_config() {
[ -f ${IPSEC_CONF} ] || exit 6
config_error=$(ipsec addconn --config ${IPSEC_CONF} --checkconfig 2>&1)
RETVAL=$?
if [ ${RETVAL} -gt 0 ]; then
echo "Configuration error - the following error occurred:"
echo ${config_error}
echo "IKE daemon status was not modified"
exit ${RETVAL}
fi
}
start() {
echo -n "Starting pluto IKE daemon for IPsec: "
ipsec _stackmanager start
# pluto searches the current directory, so this is required for making it selinux compliant
cd /
# Create nss db or convert from old format to new sql format
ipsec --checknss
# Enable nflog if configured
ipsec --checknflog > /dev/null
# This script will enter an endless loop to ensure pluto restarts on crash
ipsec _plutorun --config ${IPSEC_CONF} --nofork ${PLUTO_OPTIONS} &
[ -d ${lockdir} ] || mkdir -p ${lockdir}
touch ${lockfile}
# Because _plutorun starts pluto at background we need to make sure pluto is started
# before we know if start was successful or not
for waitsec in 1 2 3 4 5; do
if status >/dev/null; then
RETVAL=0
break
else
echo -n "."
sleep 1
RETVAL=1
fi
done
if [ ${RETVAL} -ge 1 ]; then
rm -f ${lockfile}
fi
echo
return ${RETVAL}
}
stop() {
if [ -e ${plutoctl} ]; then
echo "Shutting down pluto IKE daemon"
ipsec whack --shutdown 2>/dev/null
# don't use seq, might not exist on embedded
for waitsec in 1 2 3 4 5 6 7 8 9 10; do
if [ -s ${plutopid} ]; then
echo -n "."
sleep 1
else
break
fi
done
echo
rm -f ${plutoctl} # we won't be using this anymore
fi
if [ -s ${plutopid} ]; then
# pluto did not die peacefully
pid=$(cat ${plutopid})
if [ -d /proc/${pid} ]; then
kill -TERM ${pid}
RETVAL=$?
sleep 5;
if [ -d /proc/${pid} ]; then
kill -KILL ${pid}
RETVAL=$?
fi
if [ ${RETVAL} -ne 0 ]; then
echo "Kill failed - removing orphaned ${plutopid}"
fi
else
echo "Removing orphaned ${plutopid}"
fi
rm -f ${plutopid}
fi
ipsec _stackmanager stop
ipsec --stopnflog > /dev/null
# cleaning up backup resolv.conf
if [ -e ${LIBRESWAN_RESOLV_CONF} ]; then
if grep 'Libreswan' ${ORIG_RESOLV_CONF} > /dev/null 2>&1; then
cp ${LIBRESWAN_RESOLV_CONF} ${ORIG_RESOLV_CONF}
fi
rm -f ${LIBRESWAN_RESOLV_CONF}
fi
rm -f ${lockfile}
return ${RETVAL}
}
restart() {
verify_config
stop
start
return $?
}
status() {
local RC
if [ -f ${plutopid} ]; then
if [ -r ${plutopid} ]; then
pid=$(cat ${plutopid})
if [ -n "$pid" -a -d /proc/${pid} ]; then
RC=0 # running
else
RC=1 # not running but pid exists
fi
else
RC=4 # insufficient privileges
fi
fi
if [ -z "${RC}" ]; then
if [ -f ${lockfile} ]; then
RC=2
else
RC=3
fi
fi
case "${RC}" in
0)
echo "ipsec: pluto (pid ${pid}) is running..."
return 0
;;
1)
echo "ipsec: pluto dead but pid file exits"
return 1
;;
2)
echo "ipsec: pluto dead but subsys locked"
return 2
;;
4)
echo "ipsec: pluto status unknown due to insufficient privileges."
return 4
;;
esac
echo "ipsec: pluto is stopped"
return 3
}
condrestart() {
verify_config
RETVAL=$?
if [ -f ${lockfile} ]; then
restart
RETVAL=$?
fi
return ${RETVAL}
}
version() {
ipsec version
return $?
}
# do it
case "$1" in
start)
start
RETVAL=$?
;;
stop)
stop
RETVAL=$?
;;
restart)
restart
RETVAL=$?
;;
reload|force-reload)
restart
RETVAL=$?
;;
condrestart|try-restart)
condrestart
RETVAL=$?
;;
status)
status
RETVAL=$?
${IPSEC_EXECDIR}/whack --status 2>/dev/null | grep Total | sed 's/^000\ Total\ //'
;;
version)
version
RETVAL=$?
;;
*)
echo "Usage: $0 {start|stop|restart|reload|force-reload|condrestart|try-restart|status|version}"
RETVAL=2
esac
exit ${RETVAL}

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# This file is part of L2TP/IPSec VPN Server Docker image.
# Define your own values for these environment variables.
# DO NOT put "" or '' around values, or add space around =
# DO NOT use these special characters within values: \ " '
VPN_IPSEC_PSK=teddysun.com
VPN_USER=vpnuser
VPN_PASSWORD=vpnpassword
VPN_PUBLIC_IP=
VPN_L2TP_NET=
VPN_L2TP_LOCAL=
VPN_L2TP_REMOTE=
VPN_XAUTH_NET=
VPN_XAUTH_REMOTE=
VPN_DNS1=
VPN_DNS2=

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#!/bin/sh
PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin
export PATH
#
# This is a Shell script for configure and start L2TP/IPSec VPN server with Docker image
#
# Copyright (C) 2018 Teddysun <i@teddysun.com>
#
# Reference URL:
# https://github.com/libreswan/libreswan
# https://github.com/xelerance/xl2tpd
if [ ! -f "/.dockerenv" ]; then
echo "Error: This script must be run in a Docker container." >&2
exit 1
fi
if ip link add dummy0 type dummy 2>&1 | grep -q "not permitted"; then
echo "Error: This Docker image must be run in privileged mode." >&2
exit 1
fi
ip link delete dummy0 >/dev/null 2>&1
rand(){
str=$(cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 10 | head -n 1)
echo ${str}
}
is_64bit(){
if [ "$(getconf WORD_BIT)" = "32" ] && [ "$(getconf LONG_BIT)" = "64" ]; then
return 0
else
return 1
fi
}
# Environment file name
l2tp_env_file="/etc/l2tp.env"
# Auto generated
if [ -z "${VPN_IPSEC_PSK}" ] && [ -z "${VPN_USER}" ] && [ -z "${VPN_PASSWORD}" ]; then
if [ -f "${l2tp_env_file}" ]; then
echo "Loading previously generated environment variables for L2TP/IPSec VPN Server..."
. "${l2tp_env_file}"
else
echo "L2TP/IPSec VPN Server environment variables is not set. Use default environment variables..."
VPN_IPSEC_PSK="teddysun.com"
VPN_USER="vpnuser"
VPN_PASSWORD="$(rand)"
echo "VPN_IPSEC_PSK=${VPN_IPSEC_PSK}" > ${l2tp_env_file}
echo "VPN_USER=${VPN_USER}" >> ${l2tp_env_file}
echo "VPN_PASSWORD=${VPN_PASSWORD}" >> ${l2tp_env_file}
chmod 600 ${l2tp_env_file}
fi
fi
# Environment variables:
# VPN_IPSEC_PSK
# VPN_USER
# VPN_PASSWORD
if [ -z "${VPN_IPSEC_PSK}" ] || [ -z "${VPN_USER}" ] || [ -z "${VPN_PASSWORD}" ]; then
echo "Error: Environment variables must be specified. please edit your environment file and retry again." >&2
exit 1
fi
if printf '%s' "${VPN_IPSEC_PSK} ${VPN_USER} ${VPN_PASSWORD}" | LC_ALL=C grep -q '[^ -~]\+'; then
echo "Error: Environment variables must not contain non-ASCII characters." >&2
exit 1
fi
case "${VPN_IPSEC_PSK} ${VPN_USER} ${VPN_PASSWORD}" in
*[\\\"\']*)
echo "Error: Environment variables must not contain these special characters like: \\ \" '"
exit 1
;;
esac
# Environment variables:
# VPN_PUBLIC_IP
PUBLIC_IP=${VPN_PUBLIC_IP:-''}
[ -z "${PUBLIC_IP}" ] && PUBLIC_IP=$( wget -qO- -t1 -T2 ipv4.icanhazip.com )
[ -z "${PUBLIC_IP}" ] && PUBLIC_IP=$( wget -qO- -t1 -T2 ipinfo.io/ip )
# Environment variables:
# VPN_L2TP_NET
# VPN_L2TP_LOCAL
# VPN_L2TP_REMOTE
# VPN_XAUTH_NET
# VPN_XAUTH_REMOTE
# VPN_DNS1
# VPN_DNS2
L2TP_NET=${VPN_L2TP_NET:-'192.168.18.0/24'}
L2TP_LOCAL=${VPN_L2TP_LOCAL:-'192.168.18.1'}
L2TP_REMOTE=${VPN_L2TP_REMOTE:-'192.168.18.10-192.168.18.250'}
XAUTH_NET=${VPN_XAUTH_NET:-'192.168.20.0/24'}
XAUTH_REMOTE=${VPN_XAUTH_REMOTE:-'192.168.20.10-192.168.20.250'}
DNS1=${VPN_DNS1:-'8.8.8.8'}
DNS2=${VPN_DNS2:-'8.8.4.4'}
# Create IPSec config
cat > /etc/ipsec.conf <<EOF
version 2.0
config setup
protostack=netkey
nhelpers=0
uniqueids=no
interfaces=%defaultroute
virtual-private=%v4:10.0.0.0/8,%v4:192.168.0.0/16,%v4:172.16.0.0/12,%v4:!${L2TP_NET},%v4:!${XAUTH_NET}
conn shared
left=%defaultroute
leftid=${PUBLIC_IP}
right=%any
encapsulation=yes
authby=secret
pfs=no
rekey=no
keyingtries=5
dpddelay=30
dpdtimeout=120
dpdaction=clear
ike=3des-sha1,3des-sha2,aes-sha1,aes-sha1;modp1024,aes-sha2,aes-sha2;modp1024
phase2alg=3des-sha1,3des-sha2,aes-sha1,aes-sha2,aes256-sha2_512
sha2-truncbug=yes
conn l2tp-psk
auto=add
leftprotoport=17/1701
rightprotoport=17/%any
type=transport
phase2=esp
also=shared
conn xauth-psk
auto=add
leftsubnet=0.0.0.0/0
rightaddresspool=${XAUTH_REMOTE}
modecfgdns=${DNS1},${DNS2}
leftxauthserver=yes
rightxauthclient=yes
leftmodecfgserver=yes
rightmodecfgclient=yes
modecfgpull=yes
xauthby=file
ike-frag=yes
ikev2=never
cisco-unity=yes
also=shared
EOF
cat > /etc/xl2tpd/xl2tpd.conf <<EOF
[global]
port = 1701
[lns default]
local ip = ${L2TP_LOCAL}
ip range = ${L2TP_REMOTE}
require chap = yes
refuse pap = yes
require authentication = yes
name = l2tpd
pppoptfile = /etc/ppp/options.xl2tpd
length bit = yes
EOF
cat > /etc/ppp/options.xl2tpd <<EOF
+mschap-v2
ipcp-accept-local
ipcp-accept-remote
ms-dns ${DNS1}
ms-dns ${DNS2}
noccp
auth
mtu 1280
mru 1280
proxyarp
lcp-echo-failure 4
lcp-echo-interval 30
connect-delay 5000
EOF
cat > /etc/ipsec.secrets <<EOF
%any %any : PSK "${VPN_IPSEC_PSK}"
EOF
if ! grep -qw "${VPN_USER}" /etc/ppp/chap-secrets 2>/dev/null; then
cat > /etc/ppp/chap-secrets <<EOF
${VPN_USER} l2tpd ${VPN_PASSWORD} *
EOF
fi
VPN_PASSWORD_ENC=$(openssl passwd -1 "${VPN_PASSWORD}")
if ! grep -qw "${VPN_USER}" /etc/ipsec.d/passwd 2>/dev/null; then
cat > /etc/ipsec.d/passwd <<EOF
${VPN_USER}:${VPN_PASSWORD_ENC}:xauth-psk
EOF
fi
chmod 600 /etc/ipsec.secrets /etc/ppp/chap-secrets /etc/ipsec.d/passwd
# Update sysctl settings
if is_64bit; then
SHM_MAX=68719476736
SHM_ALL=4294967296
else
SHM_MAX=4294967295
SHM_ALL=268435456
fi
sysctl -eqw kernel.msgmnb=65536
sysctl -eqw kernel.msgmax=65536
sysctl -eqw kernel.shmmax=${SHM_MAX}
sysctl -eqw kernel.shmall=${SHM_ALL}
sysctl -eqw net.ipv4.ip_forward=1
sysctl -eqw net.ipv4.conf.all.accept_source_route=0
sysctl -eqw net.ipv4.conf.all.accept_redirects=0
sysctl -eqw net.ipv4.conf.all.send_redirects=0
sysctl -eqw net.ipv4.conf.all.rp_filter=0
sysctl -eqw net.ipv4.conf.default.accept_source_route=0
sysctl -eqw net.ipv4.conf.default.accept_redirects=0
sysctl -eqw net.ipv4.conf.default.send_redirects=0
sysctl -eqw net.ipv4.conf.default.rp_filter=0
sysctl -eqw net.ipv4.conf.eth0.send_redirects=0
sysctl -eqw net.ipv4.conf.eth0.rp_filter=0
# Create iptables rules
iptables -I INPUT 1 -p udp --dport 1701 -m policy --dir in --pol none -j DROP
iptables -I INPUT 2 -m conntrack --ctstate INVALID -j DROP
iptables -I INPUT 3 -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
iptables -I INPUT 4 -p udp -m multiport --dports 500,4500 -j ACCEPT
iptables -I INPUT 5 -p udp --dport 1701 -m policy --dir in --pol ipsec -j ACCEPT
iptables -I INPUT 6 -p udp --dport 1701 -j DROP
iptables -I FORWARD 1 -m conntrack --ctstate INVALID -j DROP
iptables -I FORWARD 2 -i eth+ -o ppp+ -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
iptables -I FORWARD 3 -i ppp+ -o eth+ -j ACCEPT
iptables -I FORWARD 4 -i ppp+ -o ppp+ -s "${L2TP_NET}" -d "${L2TP_NET}" -j ACCEPT
iptables -I FORWARD 5 -i eth+ -d "${XAUTH_NET}" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
iptables -I FORWARD 6 -s "${XAUTH_NET}" -o eth+ -j ACCEPT
iptables -A FORWARD -j DROP
iptables -t nat -I POSTROUTING -s "${XAUTH_NET}" -o eth+ -m policy --dir out --pol none -j MASQUERADE
iptables -t nat -I POSTROUTING -s "${L2TP_NET}" -o eth+ -j MASQUERADE
cat <<EOF
L2TP/IPsec VPN Server with the Username and Password is below:
Server IP: ${PUBLIC_IP}
IPSec PSK: ${VPN_IPSEC_PSK}
Username : ${VPN_USER}
Password : ${VPN_PASSWORD}
EOF
# Load IPsec kernel module
modprobe af_key
# Start services
mkdir -p /run/pluto /var/run/pluto /var/run/xl2tpd
rm -f /run/pluto/pluto.pid /var/run/pluto/pluto.pid /var/run/xl2tpd.pid
/usr/sbin/ipsec start
exec /usr/sbin/xl2tpd -D -c /etc/xl2tpd/xl2tpd.conf

135
docker/l2tp/alpine/l2tpctl.sh
View File

@ -1,135 +0,0 @@
#!/bin/sh
PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin
export PATH
#
# This is a Shell script for configure and start L2TP/IPSec VPN server with Docker image
#
# Copyright (C) 2018 Teddysun <i@teddysun.com>
#
# Reference URL:
# https://github.com/libreswan/libreswan
# https://github.com/xelerance/xl2tpd
rand(){
str=$(cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 10 | head -n 1)
echo ${str}
}
list_users(){
if [ ! -f /etc/ppp/chap-secrets ];then
echo "Error: /etc/ppp/chap-secrets file not found."
exit 1
fi
local line="+-------------------------------------------+\n"
local string=%20s
printf "${line}|${string} |${string} |\n${line}" Username Password
grep -v "^#" /etc/ppp/chap-secrets | awk '{printf "|'${string}' |'${string}' |\n", $1,$3}'
printf ${line}
}
add_user(){
while :
do
read -p "Please enter Username:" user
if [ -z ${user} ]; then
echo "Username can not be empty"
else
grep -w "${user}" /etc/ppp/chap-secrets > /dev/null 2>&1
if [ $? -eq 0 ];then
echo "Username (${user}) already exists. Please re-enter your username."
else
break
fi
fi
done
pass="$(rand)"
echo "Please enter ${user}'s password:"
read -p "(Default Password: ${pass}):" tmppass
[ ! -z ${tmppass} ] && pass=${tmppass}
pass_enc=$(openssl passwd -1 "${pass}")
echo "${user} l2tpd ${pass} *" >> /etc/ppp/chap-secrets
echo "${user}:${pass_enc}:xauth-psk" >> /etc/ipsec.d/passwd
echo "Username (${user}) add completed."
}
del_user(){
while :
do
read -p "Please enter Username you want to delete it:" user
if [ -z ${user} ]; then
echo "Username can not be empty"
else
grep -w "${user}" /etc/ppp/chap-secrets >/dev/null 2>&1
if [ $? -eq 0 ];then
break
else
echo "Username (${user}) is not exists. Please re-enter your username."
fi
fi
done
sed -i "/^\<${user}\>/d" /etc/ppp/chap-secrets
sed -i "/^\<${user}\>/d" /etc/ipsec.d/passwd
echo "Username (${user}) delete completed."
}
mod_user(){
while :
do
read -p "Please enter Username you want to change password:" user
if [ -z ${user} ]; then
echo "Username can not be empty"
else
grep -w "${user}" /etc/ppp/chap-secrets >/dev/null 2>&1
if [ $? -eq 0 ];then
break
else
echo "Username (${user}) is not exists. Please re-enter your username."
fi
fi
done
pass="$(rand)"
echo "Please enter ${user}'s new password:"
read -p "(Default Password: ${pass}):" tmppass
[ ! -z ${tmppass} ] && pass=${tmppass}
pass_enc=$(openssl passwd -1 "${pass}")
sed -i "/^\<${user}\>/d" /etc/ppp/chap-secrets
sed -i "/^\<${user}\>/d" /etc/ipsec.d/passwd
echo "${user} l2tpd ${pass} *" >> /etc/ppp/chap-secrets
echo "${user}:${pass_enc}:xauth-psk" >> /etc/ipsec.d/passwd
echo "Username ${user}'s password has been changed."
}
get_version(){
ipsec --version
xl2tpd --version
}
action=$1
case ${action} in
-l|--list)
list_users
;;
-a|--add)
add_user
;;
-d|--del)
del_user
;;
-m|--mod)
mod_user
;;
-v|--version)
get_version
;;
-h|--help)
echo "Usage: `basename $0` -l,--list List all users"
echo " `basename $0` -a,--add Add a user"
echo " `basename $0` -d,--del Delete a user"
echo " `basename $0` -m,--mod Modify a user password"
echo " `basename $0` -v,--version Print program version"
echo " `basename $0` -h,--help Print this help information"
;;
*)
echo "Usage: `basename $0` [-l,--list|-a,--add|-d,--del|-m,--mod|-v,--version|-h,--help]" && exit
;;
esac

1
docker/l2tp/l2tp.env
View File

@ -14,3 +14,4 @@ VPN_XAUTH_NET=
VPN_XAUTH_REMOTE=
VPN_DNS1=
VPN_DNS2=
VPN_SHA2_TRUNCBUG=

19
docker/l2tp/l2tp.sh
View File

@ -90,6 +90,7 @@ PUBLIC_IP=${VPN_PUBLIC_IP:-''}
# VPN_XAUTH_REMOTE
# VPN_DNS1
# VPN_DNS2
# VPN_SHA2_TRUNCBUG
L2TP_NET=${VPN_L2TP_NET:-'192.168.18.0/24'}
L2TP_LOCAL=${VPN_L2TP_LOCAL:-'192.168.18.1'}
L2TP_REMOTE=${VPN_L2TP_REMOTE:-'192.168.18.10-192.168.18.250'}
@ -98,13 +99,21 @@ XAUTH_REMOTE=${VPN_XAUTH_REMOTE:-'192.168.20.10-192.168.20.250'}
DNS1=${VPN_DNS1:-'8.8.8.8'}
DNS2=${VPN_DNS2:-'8.8.4.4'}
case ${VPN_SHA2_TRUNCBUG} in
[yY][eE][sS])
SHA2_TRUNCBUG=yes
;;
*)
SHA2_TRUNCBUG=no
;;
esac
# Create IPSec config
cat > /etc/ipsec.conf <<EOF
version 2.0
config setup
protostack=netkey
nhelpers=0
uniqueids=no
interfaces=%defaultroute
virtual-private=%v4:10.0.0.0/8,%v4:192.168.0.0/16,%v4:172.16.0.0/12,%v4:!${L2TP_NET},%v4:!${XAUTH_NET}
@ -121,9 +130,10 @@ conn shared
dpddelay=30
dpdtimeout=120
dpdaction=clear
ike=3des-sha1,3des-sha2,aes-sha1,aes-sha1;modp1024,aes-sha2,aes-sha2;modp1024
phase2alg=3des-sha1,3des-sha2,aes-sha1,aes-sha2,aes256-sha2_512
sha2-truncbug=yes
ikev2=never
ike=aes256-sha2,aes128-sha2,aes256-sha1,aes128-sha1,aes256-sha2;modp1024,aes128-sha1;modp1024
phase2alg=aes_gcm-null,aes128-sha1,aes256-sha1,aes256-sha2_512,aes128-sha2,aes256-sha2
sha2-truncbug=${SHA2_TRUNCBUG}
conn l2tp-psk
auto=add
@ -145,7 +155,6 @@ conn xauth-psk
modecfgpull=yes
xauthby=file
ike-frag=yes
ikev2=never
cisco-unity=yes
also=shared
EOF