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Lin Song 2015-08-18 16:14:42 -05:00 committed by hwdsl2
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README.md Normal file
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## IPsec/L2TP VPN Auto Install Script for Ubuntu/Debian
Amazon EC2 user-data file for automatic configuration of IPsec/L2TP VPN server on a Ubuntu or Debian instance. Tested with Ubuntu 14.04 & 12.04 and Debian 8 (Jessie).
With minor modifications, this script **can also be used** on dedicated servers or any KVM- or XEN- based Virtual Private Server (VPS) from other providers.
#### <a href="https://blog.ls20.com/ipsec-l2tp-vpn-auto-setup-for-ubuntu-12-04-on-amazon-ec2/" target="_blank">My VPN tutorial with detailed usage instructions</a>
<a href="https://gist.github.com/hwdsl2/e9a78a50e300d12ae195" target="_blank">Alternative VPN script for CentOS/RHEL</a>
<a href="https://gist.github.com/hwdsl2/5a769b2c4436cdf02a90" target="_blank">Workaround for Debian 7 (Wheezy)</a>
<a href="http://www.sarfata.org/posts/setting-up-an-amazon-vpn-server.md" target="_blank">Original post by Thomas Sarlandie</a>
&darr;&nbsp;&nbsp;&darr;&nbsp;&nbsp;&darr; Scroll down for the script &darr;&nbsp;&nbsp;&darr;&nbsp;&nbsp;&darr;
### Copyright and license
Copyright (C) 2014&nbsp;Lin Song&nbsp;&nbsp;&nbsp;<a href="https://www.linkedin.com/in/linsongui" target="_blank"><img src="https://static.licdn.com/scds/common/u/img/webpromo/btn_profile_bluetxt_80x15.png" width="80" height="15" border="0" alt="View my profile on LinkedIn"></a>
Based on the work of Thomas Sarlandie (Copyright 2012)
This work is licensed under the <a href="http://creativecommons.org/licenses/by-sa/3.0/" target="_blank">Creative Commons Attribution-ShareAlike 3.0</a>
Attribution required: please include my name in any derivative and let me know how you have improved it!
<a href="https://github.com/igrigorik/ga-beacon" target="_blank"><img src="https://ga-bc1.appspot.com/UA-46742347-4/hwdsl2/9030462?dh=gist.github.com&amp;gif=1" alt="Analytics" style="max-width:100%;"></a>

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vpnsetup.sh
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#!/bin/sh #!/bin/sh
# #
# Amazon EC2 user-data file for automatic configuration of IPsec/L2TP VPN server # Amazon EC2 user-data file for automatic configuration of IPsec/L2TP VPN server
# on a Ubuntu or Debian instance. Tested with Ubuntu 14.04 & 12.04 and Debian 8 & 7. # on a Ubuntu or Debian instance. Tested with Ubuntu 14.04 & 12.04 and Debian 8.
# With minor modifications, this script *can also be used* on dedicated servers # With minor modifications, this script *can also be used* on dedicated servers
# or any KVM- or XEN-based Virtual Private Server (VPS) from other providers. # or any KVM- or XEN-based Virtual Private Server (VPS) from other providers.
# #
# DO NOT RUN THIS SCRIPT ON YOUR PC OR MAC! THIS IS MEANT TO BE RUN WHEN # DO NOT RUN THIS SCRIPT ON YOUR PC OR MAC! THIS IS MEANT TO BE RUN WHEN
# YOUR AMAZON EC2 INSTANCE STARTS! # YOUR AMAZON EC2 INSTANCE STARTS!
# #
# For detailed instructions, please see:
# https://blog.ls20.com/ipsec-l2tp-vpn-auto-setup-for-ubuntu-12-04-on-amazon-ec2/
# CentOS/RHEL version: https://gist.github.com/hwdsl2/e9a78a50e300d12ae195
# Original post by Thomas Sarlandie:
# http://www.sarfata.org/posts/setting-up-an-amazon-vpn-server.md
#
# Copyright (C) 2014 Lin Song # Copyright (C) 2014 Lin Song
# Based on the work of Thomas Sarlandie (Copyright 2012) # Based on the work of Thomas Sarlandie (Copyright 2012)
# #
@ -26,18 +20,17 @@
if [ "$(uname)" = "Darwin" ]; then if [ "$(uname)" = "Darwin" ]; then
echo 'DO NOT run this script on your Mac! It should only be run on a newly-created EC2 instance' echo 'DO NOT run this script on your Mac! It should only be run on a newly-created EC2 instance'
echo 'or other Dedicated Server / VPS, after you have modified it to set the variables below.' echo 'or other Dedicated Server / VPS, after you have modified it to set the variables below.'
echo 'Please see detailed instructions at the URLs in the comments.' exit 1
exit
fi fi
if [ "$(lsb_release -si)" != "Ubuntu" ] && [ "$(lsb_release -si)" != "Debian" ]; then if [ "$(lsb_release -si)" != "Ubuntu" ] && [ "$(lsb_release -si)" != "Debian" ]; then
echo "Looks like you aren't running this script on a Ubuntu or Debian system." echo "Looks like you aren't running this script on a Ubuntu or Debian system."
exit exit 1
fi fi
if [ "$(id -u)" != 0 ]; then if [ "$(id -u)" != 0 ]; then
echo "Sorry, you need to run this script as root." echo "Sorry, you need to run this script as root."
exit exit 1
fi fi
# Please define your own values for those variables # Please define your own values for those variables
@ -45,57 +38,69 @@ IPSEC_PSK=your_very_secure_key
VPN_USER=your_username VPN_USER=your_username
VPN_PASSWORD=your_very_secure_password VPN_PASSWORD=your_very_secure_password
# IMPORTANT NOTES:
# If you need multiple VPN users with different credentials, # If you need multiple VPN users with different credentials,
# please see: https://gist.github.com/hwdsl2/123b886f29f4c689f531 # please see: https://gist.github.com/hwdsl2/123b886f29f4c689f531
# Important Notes: # For Windows users, a one-time registry change is required in order to
# For Windows users, a registry change is required to allow connections # connect to a VPN server behind NAT (e.g. in Amazon EC2). Please see:
# to a VPN server behind NAT. Refer to section "Error 809" on this page: # https://documentation.meraki.com/MX-Z/Client_VPN/Troubleshooting_Client_VPN#Windows_Error_809
# https://kb.meraki.com/knowledge_base/troubleshooting-client-vpn
# iPhone/iOS users may need to replace this line in ipsec.conf:
# "rightprotoport=17/%any" with "rightprotoport=17/0".
# If using Amazon EC2, these ports must be open in the security group of # If using Amazon EC2, these ports must be open in the security group of
# your VPN server: UDP ports 500 & 4500, and TCP port 22 (optional, for SSH). # your VPN server: UDP ports 500 & 4500, and TCP port 22 (optional, for SSH).
# If your server uses a custom SSH port (not 22), or if you wish to allow other services
# through IPTables, be sure to edit the IPTables rules below before running this script.
# This script will backup /etc/rc.local, /etc/sysctl.conf and /etc/iptables.rules
# before overwriting them. Backups can be found under the same folder with .old suffix.
# iPhone/iOS users may need to replace this line in ipsec.conf:
# "rightprotoport=17/%any" with "rightprotoport=17/0".
# Update package index and install wget, dig (dnsutils) and nano # Update package index and install wget, dig (dnsutils) and nano
export DEBIAN_FRONTEND=noninteractive
apt-get -y update apt-get -y update
apt-get -y install wget dnsutils nano apt-get -y install wget dnsutils nano
echo 'If the script hangs here, press Ctrl-C to interrupt, then edit it and comment out' echo 'If the script hangs here, press Ctrl-C to interrupt, then edit it and comment out'
echo 'the next two lines PUBLIC_IP= and PRIVATE_IP=, OR replace them with the actual IPs.' echo 'the next two lines PUBLIC_IP= and PRIVATE_IP=, OR replace them with the actual IPs.'
# In Amazon EC2, these two variables will be found automatically # In Amazon EC2, these two variables will be found automatically.
# For all other servers, you may replace them with the actual IPs, # For all other servers, you may replace them with the actual IPs,
# or comment out and let the script auto-detect in the next section # or comment out and let the script auto-detect in the next section.
# If your server only has a public IP, use that IP on both lines # If your server only has a public IP, use that IP on both lines.
PUBLIC_IP=$(wget --retry-connrefused --tries=3 --timeout 15 -qO- 'http://169.254.169.254/latest/meta-data/public-ipv4') PUBLIC_IP=$(wget --retry-connrefused -t 3 -T 15 -qO- 'http://169.254.169.254/latest/meta-data/public-ipv4')
PRIVATE_IP=$(wget --retry-connrefused --tries=3 --timeout 15 -qO- 'http://169.254.169.254/latest/meta-data/local-ipv4') PRIVATE_IP=$(wget --retry-connrefused -t 3 -T 15 -qO- 'http://169.254.169.254/latest/meta-data/local-ipv4')
# Attempt to find Public IP and Private IP automatically for non-EC2 servers # Attempt to find server IPs automatically for non-EC2 servers
[ "$PUBLIC_IP" = "" ] && PUBLIC_IP=$(dig +short myip.opendns.com @resolver1.opendns.com) [ "$PUBLIC_IP" = "" ] && PUBLIC_IP=$(dig +short myip.opendns.com @resolver1.opendns.com)
[ "$PUBLIC_IP" = "" ] && { echo "Could not find Public IP, please edit the script manually."; exit; } [ "$PUBLIC_IP" = "" ] && PUBLIC_IP=$(wget -t 3 -T 15 -qO- http://ipecho.net/plain)
[ "$PUBLIC_IP" = "" ] && { echo "Could not find Public IP, please edit the VPN script manually."; exit 1; }
[ "$PRIVATE_IP" = "" ] && PRIVATE_IP=$(ifconfig eth0 | grep -Eo 'inet (addr:)?([0-9]*\.){3}[0-9]*' | grep -Eo '([0-9]*\.){3}[0-9]*') [ "$PRIVATE_IP" = "" ] && PRIVATE_IP=$(ifconfig eth0 | grep -Eo 'inet (addr:)?([0-9]*\.){3}[0-9]*' | grep -Eo '([0-9]*\.){3}[0-9]*')
[ "$PRIVATE_IP" = "" ] && { echo "Could not find Private IP, please edit the script manually."; exit; } [ "$PRIVATE_IP" = "" ] && { echo "Could not find Private IP, please edit the VPN script manually."; exit 1; }
# Install necessary packages # Install necessary packages
apt-get -y install libnss3-dev libnspr4-dev pkg-config libpam0g-dev \ apt-get -y 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 \
libcurl4-nss-dev libgmp3-dev flex bison gcc make \ libcurl4-nss-dev libgmp3-dev flex bison gcc make \
libunbound-dev libnss3-tools libunbound-dev libnss3-tools libevent-dev
apt-get -y --no-install-recommends install xmlto
apt-get -y install xl2tpd apt-get -y install xl2tpd
# Compile and install Libreswan (https://libreswan.org/) # Create and change to working dir
# To upgrade Libreswan when a newer version is available, just re-run these
# eight commands with the new "SWAN_VER", and then restart services with
# "service ipsec restart" and "service xl2tpd restart".
mkdir -p /opt/src mkdir -p /opt/src
cd /opt/src cd /opt/src || { echo "Failed to change working directory to /opt/src. Aborting."; exit 1; }
SWAN_VER=3.13
# Compile and install Libreswan (https://libreswan.org/)
# To upgrade Libreswan when a newer version is available, just re-run
# these commands with the new "SWAN_VER", and then restart services with
# "service ipsec restart" and "service xl2tpd restart".
SWAN_VER=3.16
SWAN_URL=https://download.libreswan.org/libreswan-${SWAN_VER}.tar.gz SWAN_URL=https://download.libreswan.org/libreswan-${SWAN_VER}.tar.gz
wget --retry-connrefused --tries=3 --timeout 15 -qO- $SWAN_URL | tar xvz wget -t 3 -T 30 -qO- $SWAN_URL | tar xvz
[ ! -d libreswan-${SWAN_VER} ] && { echo "Could not retrieve the Libreswan source file. Aborting."; exit; } [ ! -d libreswan-${SWAN_VER} ] && { echo "Could not retrieve Libreswan source files. Aborting."; exit 1; }
cd libreswan-${SWAN_VER} cd libreswan-${SWAN_VER}
make programs && make install make programs && make install
@ -186,7 +191,7 @@ cat > /etc/ppp/chap-secrets <<EOF
$VPN_USER l2tpd $VPN_PASSWORD * $VPN_USER l2tpd $VPN_PASSWORD *
EOF EOF
/bin/cp -f /etc/sysctl.conf /etc/sysctl.conf.old-$(date +%Y-%m-%d-%H:%M:%S) 2>/dev/null /bin/cp -f /etc/sysctl.conf "/etc/sysctl.conf.old-$(date +%Y-%m-%d-%H:%M:%S)" 2>/dev/null
cat > /etc/sysctl.conf <<EOF cat > /etc/sysctl.conf <<EOF
kernel.sysrq = 0 kernel.sysrq = 0
kernel.core_uses_pid = 1 kernel.core_uses_pid = 1
@ -219,7 +224,7 @@ net.ipv4.tcp_rmem= 10240 87380 12582912
net.ipv4.tcp_wmem= 10240 87380 12582912 net.ipv4.tcp_wmem= 10240 87380 12582912
EOF EOF
/bin/cp -f /etc/iptables.rules /etc/iptables.rules.old-$(date +%Y-%m-%d-%H:%M:%S) 2>/dev/null /bin/cp -f /etc/iptables.rules "/etc/iptables.rules.old-$(date +%Y-%m-%d-%H:%M:%S)" 2>/dev/null
cat > /etc/iptables.rules <<EOF cat > /etc/iptables.rules <<EOF
*filter *filter
:INPUT ACCEPT [0:0] :INPUT ACCEPT [0:0]
@ -239,6 +244,8 @@ cat > /etc/iptables.rules <<EOF
-A FORWARD -m conntrack --ctstate INVALID -j DROP -A FORWARD -m conntrack --ctstate INVALID -j DROP
-A FORWARD -i eth+ -o ppp+ -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT -A FORWARD -i eth+ -o ppp+ -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
-A FORWARD -i ppp+ -o eth+ -j ACCEPT -A FORWARD -i ppp+ -o eth+ -j ACCEPT
# If you wish to allow traffic between VPN clients themselves, uncomment this line:
# -A FORWARD -i ppp+ -o ppp+ -s 192.168.42.0/24 -d 192.168.42.0/24 -j ACCEPT
-A FORWARD -j DROP -A FORWARD -j DROP
-A ICMPALL -p icmp -f -j DROP -A ICMPALL -p icmp -f -j DROP
-A ICMPALL -p icmp --icmp-type 0 -j ACCEPT -A ICMPALL -p icmp --icmp-type 0 -j ACCEPT
@ -263,7 +270,7 @@ cat > /etc/network/if-pre-up.d/iptablesload <<EOF
exit 0 exit 0
EOF EOF
/bin/cp -f /etc/rc.local /etc/rc.local.old-$(date +%Y-%m-%d-%H:%M:%S) 2>/dev/null /bin/cp -f /etc/rc.local "/etc/rc.local.old-$(date +%Y-%m-%d-%H:%M:%S)" 2>/dev/null
cat > /etc/rc.local <<EOF cat > /etc/rc.local <<EOF
#!/bin/sh -e #!/bin/sh -e
# #