diff --git a/README.md b/README.md new file mode 100644 index 0000000..b9ff3f9 --- /dev/null +++ b/README.md @@ -0,0 +1,22 @@ +## 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. + +#### My VPN tutorial with detailed usage instructions +Alternative VPN script for CentOS/RHEL +Workaround for Debian 7 (Wheezy) +Original post by Thomas Sarlandie + +↓  ↓  ↓ Scroll down for the script ↓  ↓  ↓ + +### Copyright and license + +Copyright (C) 2014 Lin Song   View my profile on LinkedIn +Based on the work of Thomas Sarlandie (Copyright 2012) + +This work is licensed under the Creative Commons Attribution-ShareAlike 3.0 +Attribution required: please include my name in any derivative and let me know how you have improved it! + +Analytics \ No newline at end of file diff --git a/vpnsetup.sh b/vpnsetup.sh index 66deba2..4d54061 100644 --- a/vpnsetup.sh +++ b/vpnsetup.sh @@ -1,19 +1,13 @@ #!/bin/sh # # 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 # 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 # 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 # Based on the work of Thomas Sarlandie (Copyright 2012) # @@ -26,18 +20,17 @@ if [ "$(uname)" = "Darwin" ]; then echo 'DO NOT run this script on your Mac! It should only be run on a newly-created EC2 instance' echo 'or other Dedicated Server / VPS, after you have modified it to set the variables below.' - echo 'Please see detailed instructions at the URLs in the comments.' - exit + exit 1 fi if [ "$(lsb_release -si)" != "Ubuntu" ] && [ "$(lsb_release -si)" != "Debian" ]; then echo "Looks like you aren't running this script on a Ubuntu or Debian system." - exit + exit 1 fi if [ "$(id -u)" != 0 ]; then echo "Sorry, you need to run this script as root." - exit + exit 1 fi # Please define your own values for those variables @@ -45,57 +38,69 @@ IPSEC_PSK=your_very_secure_key VPN_USER=your_username VPN_PASSWORD=your_very_secure_password +# IMPORTANT NOTES: + # If you need multiple VPN users with different credentials, # please see: https://gist.github.com/hwdsl2/123b886f29f4c689f531 -# Important Notes: -# For Windows users, a registry change is required to allow connections -# to a VPN server behind NAT. Refer to section "Error 809" on this page: -# 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". +# For Windows users, a one-time registry change is required in order to +# connect to a VPN server behind NAT (e.g. in Amazon EC2). Please see: +# https://documentation.meraki.com/MX-Z/Client_VPN/Troubleshooting_Client_VPN#Windows_Error_809 # 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). +# 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 +export DEBIAN_FRONTEND=noninteractive apt-get -y update 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 '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, -# 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 -PUBLIC_IP=$(wget --retry-connrefused --tries=3 --timeout 15 -qO- 'http://169.254.169.254/latest/meta-data/public-ipv4') -PRIVATE_IP=$(wget --retry-connrefused --tries=3 --timeout 15 -qO- 'http://169.254.169.254/latest/meta-data/local-ipv4') +# 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. +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 -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) -[ "$PUBLIC_IP" = "" ] && { echo "Could not find Public IP, please edit the script manually."; exit; } +[ "$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]*') -[ "$PRIVATE_IP" = "" ] && { echo "Could not find Private IP, please edit the script manually."; exit; } +[ "$PRIVATE_IP" = "" ] && { echo "Could not find Private IP, please edit the VPN script manually."; exit 1; } # Install necessary packages apt-get -y install libnss3-dev libnspr4-dev pkg-config libpam0g-dev \ libcap-ng-dev libcap-ng-utils libselinux1-dev \ 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 -# Compile and install Libreswan (https://libreswan.org/) -# 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". +# Create and change to working dir mkdir -p /opt/src -cd /opt/src -SWAN_VER=3.13 +cd /opt/src || { echo "Failed to change working directory to /opt/src. Aborting."; exit 1; } + +# 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 -wget --retry-connrefused --tries=3 --timeout 15 -qO- $SWAN_URL | tar xvz -[ ! -d libreswan-${SWAN_VER} ] && { echo "Could not retrieve the Libreswan source file. Aborting."; exit; } +wget -t 3 -T 30 -qO- $SWAN_URL | tar xvz +[ ! -d libreswan-${SWAN_VER} ] && { echo "Could not retrieve Libreswan source files. Aborting."; exit 1; } cd libreswan-${SWAN_VER} make programs && make install @@ -186,7 +191,7 @@ cat > /etc/ppp/chap-secrets </dev/null +/bin/cp -f /etc/sysctl.conf "/etc/sysctl.conf.old-$(date +%Y-%m-%d-%H:%M:%S)" 2>/dev/null cat > /etc/sysctl.conf </dev/null +/bin/cp -f /etc/iptables.rules "/etc/iptables.rules.old-$(date +%Y-%m-%d-%H:%M:%S)" 2>/dev/null cat > /etc/iptables.rules < /etc/iptables.rules < /etc/network/if-pre-up.d/iptablesload </dev/null +/bin/cp -f /etc/rc.local "/etc/rc.local.old-$(date +%Y-%m-%d-%H:%M:%S)" 2>/dev/null cat > /etc/rc.local <