Update README.md and add vpnsetup_centos.sh
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Lin Song
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README.md
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README.md
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## IPsec/L2TP VPN Auto Install Script for Ubuntu/Debian
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# IPsec/L2TP VPN Server Auto Setup Scripts
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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).
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Scripts for automatic setup of an IPsec/L2TP VPN server on Ubuntu 14.04 & 12.04, Debian 8 and CentOS/RHEL 6 & 7. Works on dedicated servers or any KVM- or XEN-based Virtual Private Server (VPS), with **freshly installed** Linux OS.
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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.
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They can also be used as Amazon EC2 "user-data" with the <a href="https://cloud-images.ubuntu.com/locator/ec2/" target="_blank">Ubuntu 14.04/12.04</a>, <a href="https://wiki.debian.org/Cloud/AmazonEC2Image/Jessie" target="_blank">Debian 8</a> or <a href="https://aws.amazon.com/marketplace/pp/B00O7WM7QW" target="_blank">CentOS 7</a> AMIs.
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Do **NOT** run these scripts on your PC or Mac! They are meant to be run on a dedicated server or VPS.
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#### <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>
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<a href="https://gist.github.com/hwdsl2/e9a78a50e300d12ae195" target="_blank">Alternative VPN script for CentOS/RHEL</a>
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<a href="https://gist.github.com/hwdsl2/123b886f29f4c689f531" target="_blank">Enable multiple VPN users with different credentials</a>
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<a href="https://gist.github.com/hwdsl2/5a769b2c4436cdf02a90" target="_blank">Workaround for Debian 7 (Wheezy)</a>
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<a href="http://www.sarfata.org/posts/setting-up-an-amazon-vpn-server.md" target="_blank">Original post by Thomas Sarlandie</a>
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↓ ↓ ↓ Scroll down for the script ↓ ↓ ↓
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## Installation
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### Copyright and license
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### For Ubuntu and Debian:
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```bash
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wget https://github.com/hwdsl2/setup-ipsec-vpn/raw/master/vpnsetup.sh -O vpnsetup.sh
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nano -w vpnsetup.sh
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[Edit and replace IPSEC_PSK, VPN_USER and VPN_PASSWORD with your own values]
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/bin/sh vpnsetup.sh
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```
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### For CentOS and RHEL:
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```bash
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wget https://github.com/hwdsl2/setup-ipsec-vpn/raw/master/vpnsetup_centos.sh -O vpnsetup_centos.sh
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nano -w vpnsetup_centos.sh
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[Edit and replace IPSEC_PSK, VPN_USER and VPN_PASSWORD with your own values]
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/bin/sh vpnsetup_centos.sh
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```
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## Important Notes
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For Windows users, a <a href="https://documentation.meraki.com/MX-Z/Client_VPN/Troubleshooting_Client_VPN#Windows_Error_809" target="_blank">one-time registry change</a> is required for connections to a VPN server behind NAT (e.g. Amazon EC2).
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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).
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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 in the scripts before using.
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The scripts will backup /etc/rc.local, /etc/sysctl.conf, /etc/iptables.rules and /etc/sysconfig/iptables before overwriting them. Backups can be found under the same folder with .old suffix.
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## Copyright and license
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Copyright (C) 2014 Lin Song <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>
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Based on the work of Thomas Sarlandie (Copyright 2012)
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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>
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Attribution required: please include my name in any derivative and let me know how you have improved it!
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<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&gif=1" alt="Analytics" style="max-width:100%;"></a>
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329
vpnsetup_centos.sh
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vpnsetup_centos.sh
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#!/bin/sh
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#
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# Script for automatic configuration of IPsec/L2TP VPN server on 64-bit CentOS/RHEL 6 & 7.
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# Works on dedicated servers or any KVM- or XEN-based Virtual Private Server (VPS).
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# It can also be used as the Amazon EC2 "user-data" with the official CentOS 7 AMI.
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# Note that the CentOS 6 AMI does NOT come with cloud-init, therefore you need to
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# run this script manually after instance creation.
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#
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# DO NOT RUN THIS SCRIPT ON YOUR PC OR MAC! THIS IS MEANT TO BE RUN
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# ON YOUR DEDICATED SERVER OR VPS!
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#
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# Copyright (C) 2015 Lin Song
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# Based on the work of Thomas Sarlandie (Copyright 2012)
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#
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# This work is licensed under the Creative Commons Attribution-ShareAlike 3.0
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# Unported License: http://creativecommons.org/licenses/by-sa/3.0/
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#
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# Attribution required: please include my name in any derivative and let me
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# know how you have improved it!
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if [ "$(uname)" = "Darwin" ]; then
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echo 'DO NOT run this script on your Mac! It should only be run on a Dedicated Server / VPS'
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echo 'or a newly-created EC2 instance, after you have modified it to set the variables below.'
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exit 1
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fi
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if [ ! -f /etc/redhat-release ]; then
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echo "Looks like you aren't running this script on a CentOS/RHEL system."
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exit 1
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fi
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if [ "$(uname -m)" != "x86_64" ]; then
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echo "Sorry, this script only supports 64-bit CentOS/RHEL."
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exit 1
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fi
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if [ "$(id -u)" != 0 ]; then
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echo "Sorry, you need to run this script as root."
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exit 1
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fi
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# Please define your own values for those variables
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IPSEC_PSK=your_very_secure_key
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VPN_USER=your_username
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VPN_PASSWORD=your_very_secure_password
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# IMPORTANT NOTES:
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# If you need multiple VPN users with different credentials,
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# please see: https://gist.github.com/hwdsl2/123b886f29f4c689f531
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# For Windows users, a one-time registry change is required in order to
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# connect to a VPN server behind NAT (e.g. in Amazon EC2). Please see:
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# https://documentation.meraki.com/MX-Z/Client_VPN/Troubleshooting_Client_VPN#Windows_Error_809
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# If using Amazon EC2, these ports must be open in the security group of
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# your VPN server: UDP ports 500 & 4500, and TCP port 22 (optional, for SSH).
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# If your server uses a custom SSH port (not 22), or if you wish to allow other services
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# through IPTables, be sure to edit the IPTables rules below before running this script.
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# This script will backup /etc/rc.local, /etc/sysctl.conf and /etc/sysconfig/iptables
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# before overwriting them. Backups can be found under the same folder with .old suffix.
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# iPhone/iOS users may need to replace this line in ipsec.conf:
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# "rightprotoport=17/%any" with "rightprotoport=17/0".
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# Install wget, dig (bind-utils) and nano
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yum -y install wget bind-utils nano
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echo 'If the script hangs here, press Ctrl-C to interrupt, then edit it and comment out'
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echo 'the next two lines PUBLIC_IP= and PRIVATE_IP=, OR replace them with the actual IPs.'
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# In Amazon EC2, these two variables will be found automatically.
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# For all other servers, you may replace them with the actual IPs,
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# or comment out and let the script auto-detect in the next section.
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# If your server only has a public IP, use that IP on both lines.
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PUBLIC_IP=$(wget --retry-connrefused -t 3 -T 15 -qO- 'http://169.254.169.254/latest/meta-data/public-ipv4')
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PRIVATE_IP=$(wget --retry-connrefused -t 3 -T 15 -qO- 'http://169.254.169.254/latest/meta-data/local-ipv4')
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# Attempt to find server IPs automatically for non-EC2 servers
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[ "$PUBLIC_IP" = "" ] && PUBLIC_IP=$(dig +short myip.opendns.com @resolver1.opendns.com)
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[ "$PUBLIC_IP" = "" ] && PUBLIC_IP=$(wget -t 3 -T 15 -qO- http://ipecho.net/plain)
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[ "$PUBLIC_IP" = "" ] && { echo "Could not find Public IP, please edit the VPN script manually."; exit 1; }
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[ "$PRIVATE_IP" = "" ] && PRIVATE_IP=$(ifconfig eth0 | grep -Eo 'inet (addr:)?([0-9]*\.){3}[0-9]*' | grep -Eo '([0-9]*\.){3}[0-9]*')
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[ "$PRIVATE_IP" = "" ] && { echo "Could not find Private IP, please edit the VPN script manually."; exit 1; }
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# Create and change to working dir
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mkdir -p /opt/src
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cd /opt/src || { echo "Failed to change working directory to /opt/src. Aborting."; exit 1; }
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# Add the EPEL repository
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if grep -qs "release 6" /etc/redhat-release; then
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EPEL_RPM="epel-release-6-8.noarch.rpm"
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EPEL_URL="http://download.fedoraproject.org/pub/epel/6/x86_64/$EPEL_RPM"
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elif grep -qs "release 7" /etc/redhat-release; then
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EPEL_RPM="epel-release-7-5.noarch.rpm"
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EPEL_URL="http://download.fedoraproject.org/pub/epel/7/x86_64/e/$EPEL_RPM"
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else
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echo "Sorry, this script only supports versions 6 and 7 of CentOS/RHEL."
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exit 1
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fi
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wget -t 3 -T 30 -nv -O $EPEL_RPM $EPEL_URL
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[ ! -f $EPEL_RPM ] && { echo "Could not retrieve EPEL repository RPM file. Aborting."; exit 1; }
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rpm -ivh --force $EPEL_RPM && /bin/rm -f $EPEL_RPM
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# Install necessary packages
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yum -y install nss-devel nspr-devel pkgconfig pam-devel \
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libcap-ng-devel libselinux-devel \
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curl-devel gmp-devel flex bison gcc make \
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fipscheck-devel unbound-devel gmp gmp-devel xmlto
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yum -y install ppp xl2tpd
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# Installed Libevent 2. Use backported version for CentOS 6.
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if grep -qs "release 6" /etc/redhat-release; then
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LE2_URL="https://people.redhat.com/pwouters/libreswan-rhel6"
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RPM1="libevent2-2.0.21-1.el6.x86_64.rpm"
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RPM2="libevent2-devel-2.0.21-1.el6.x86_64.rpm"
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wget -t 3 -T 30 -nv -O $RPM1 $LE2_URL/$RPM1
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wget -t 3 -T 30 -nv -O $RPM2 $LE2_URL/$RPM2
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[ ! -f $RPM1 ] || [ ! -f $RPM2 ] && { echo "Could not retrieve Libevent2 RPM file(s). Aborting."; exit 1; }
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rpm -ivh --force $RPM1 $RPM2 && /bin/rm -f $RPM1 $RPM2
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elif grep -qs "release 7" /etc/redhat-release; then
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yum -y install libevent-devel
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fi
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# Compile and install Libreswan (https://libreswan.org/)
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# To upgrade Libreswan when a newer version is available, just re-run these
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# commands with the new "SWAN_VER", then restore SELinux contexts using
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# the commands at the end of this script, and finally restart services with
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# "service ipsec restart" and "service xl2tpd restart".
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SWAN_VER=3.16
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SWAN_URL=https://download.libreswan.org/libreswan-${SWAN_VER}.tar.gz
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wget -t 3 -T 30 -qO- $SWAN_URL | tar xvz
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[ ! -d libreswan-${SWAN_VER} ] && { echo "Could not retrieve Libreswan source files. Aborting."; exit 1; }
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cd libreswan-${SWAN_VER}
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make programs && make install
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# Prepare various config files
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cat > /etc/ipsec.conf <<EOF
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version 2.0
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config setup
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dumpdir=/var/run/pluto/
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nat_traversal=yes
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virtual_private=%v4:10.0.0.0/8,%v4:192.168.0.0/16,%v4:172.16.0.0/12,%v4:!192.168.42.0/24
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oe=off
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protostack=netkey
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nhelpers=0
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interfaces=%defaultroute
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conn vpnpsk
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connaddrfamily=ipv4
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auto=add
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left=$PRIVATE_IP
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leftid=$PUBLIC_IP
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leftsubnet=$PRIVATE_IP/32
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leftnexthop=%defaultroute
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leftprotoport=17/1701
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rightprotoport=17/%any
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right=%any
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rightsubnetwithin=0.0.0.0/0
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forceencaps=yes
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authby=secret
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pfs=no
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type=transport
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auth=esp
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ike=3des-sha1,aes-sha1
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phase2alg=3des-sha1,aes-sha1
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rekey=no
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keyingtries=5
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dpddelay=30
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dpdtimeout=120
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dpdaction=clear
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EOF
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cat > /etc/ipsec.secrets <<EOF
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$PUBLIC_IP %any : PSK "$IPSEC_PSK"
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EOF
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cat > /etc/xl2tpd/xl2tpd.conf <<EOF
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[global]
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port = 1701
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;debug avp = yes
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;debug network = yes
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;debug state = yes
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;debug tunnel = yes
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[lns default]
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ip range = 192.168.42.10-192.168.42.250
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local ip = 192.168.42.1
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require chap = yes
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refuse pap = yes
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require authentication = yes
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name = l2tpd
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;ppp debug = yes
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pppoptfile = /etc/ppp/options.xl2tpd
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length bit = yes
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EOF
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cat > /etc/ppp/options.xl2tpd <<EOF
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ipcp-accept-local
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ipcp-accept-remote
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ms-dns 8.8.8.8
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ms-dns 8.8.4.4
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noccp
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auth
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crtscts
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idle 1800
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mtu 1280
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mru 1280
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lock
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lcp-echo-failure 10
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lcp-echo-interval 60
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connect-delay 5000
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EOF
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cat > /etc/ppp/chap-secrets <<EOF
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# Secrets for authentication using CHAP
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# client server secret IP addresses
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$VPN_USER l2tpd $VPN_PASSWORD *
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EOF
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/bin/cp -f /etc/sysctl.conf "/etc/sysctl.conf.old-$(date +%Y-%m-%d-%H:%M:%S)" 2>/dev/null
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cat > /etc/sysctl.conf <<EOF
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kernel.sysrq = 0
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kernel.core_uses_pid = 1
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net.ipv4.tcp_syncookies = 1
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kernel.msgmnb = 65536
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kernel.msgmax = 65536
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kernel.shmmax = 68719476736
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kernel.shmall = 4294967296
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net.ipv4.ip_forward = 1
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net.ipv4.conf.all.accept_source_route = 0
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net.ipv4.conf.default.accept_source_route = 0
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net.ipv4.conf.all.log_martians = 1
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net.ipv4.conf.default.log_martians = 1
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net.ipv4.conf.all.accept_redirects = 0
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net.ipv4.conf.default.accept_redirects = 0
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net.ipv4.conf.all.send_redirects = 0
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net.ipv4.conf.default.send_redirects = 0
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net.ipv4.conf.all.rp_filter = 0
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net.ipv4.conf.default.rp_filter = 0
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net.ipv6.conf.all.disable_ipv6=1
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net.ipv6.conf.default.disable_ipv6=1
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net.ipv4.icmp_echo_ignore_broadcasts = 1
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net.ipv4.icmp_ignore_bogus_error_responses = 1
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net.ipv4.conf.all.secure_redirects = 0
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net.ipv4.conf.default.secure_redirects = 0
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kernel.randomize_va_space = 1
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net.core.wmem_max=12582912
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net.core.rmem_max=12582912
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net.ipv4.tcp_rmem= 10240 87380 12582912
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net.ipv4.tcp_wmem= 10240 87380 12582912
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EOF
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/bin/cp -f /etc/sysconfig/iptables "/etc/sysconfig/iptables.old-$(date +%Y-%m-%d-%H:%M:%S)" 2>/dev/null
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cat > /etc/sysconfig/iptables <<EOF
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*filter
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:INPUT ACCEPT [0:0]
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:FORWARD ACCEPT [0:0]
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:OUTPUT ACCEPT [0:0]
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:ICMPALL - [0:0]
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-A INPUT -m conntrack --ctstate INVALID -j DROP
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-A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
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-A INPUT -i lo -j ACCEPT
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-A INPUT -p icmp --icmp-type 255 -j ICMPALL
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-A INPUT -p udp --dport 67:68 --sport 67:68 -j ACCEPT
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-A INPUT -p tcp --dport 22 -j ACCEPT
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-A INPUT -p udp -m multiport --dports 500,4500 -j ACCEPT
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-A INPUT -p udp --dport 1701 -m policy --dir in --pol ipsec -j ACCEPT
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-A INPUT -p udp --dport 1701 -j DROP
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-A INPUT -j DROP
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-A FORWARD -m conntrack --ctstate INVALID -j DROP
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-A FORWARD -i eth+ -o ppp+ -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
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-A FORWARD -i ppp+ -o eth+ -j ACCEPT
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# If you wish to allow traffic between VPN clients themselves, uncomment this line:
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# -A FORWARD -i ppp+ -o ppp+ -s 192.168.42.0/24 -d 192.168.42.0/24 -j ACCEPT
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-A FORWARD -j DROP
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-A ICMPALL -p icmp -f -j DROP
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-A ICMPALL -p icmp --icmp-type 0 -j ACCEPT
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-A ICMPALL -p icmp --icmp-type 3 -j ACCEPT
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-A ICMPALL -p icmp --icmp-type 4 -j ACCEPT
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-A ICMPALL -p icmp --icmp-type 8 -j ACCEPT
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-A ICMPALL -p icmp --icmp-type 11 -j ACCEPT
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-A ICMPALL -p icmp -j DROP
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COMMIT
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*nat
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:PREROUTING ACCEPT [0:0]
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:OUTPUT ACCEPT [0:0]
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:POSTROUTING ACCEPT [0:0]
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-A POSTROUTING -s 192.168.42.0/24 -o eth+ -j SNAT --to-source ${PRIVATE_IP}
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COMMIT
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EOF
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|
||||
/bin/cp -f /etc/rc.local "/etc/rc.local.old-$(date +%Y-%m-%d-%H:%M:%S)" 2>/dev/null
|
||||
cat > /etc/rc.local <<EOF
|
||||
#!/bin/sh
|
||||
#
|
||||
# This script will be executed *after* all the other init scripts.
|
||||
# You can put your own initialization stuff in here if you don't
|
||||
# want to do the full Sys V style init stuff.
|
||||
|
||||
touch /var/lock/subsys/local
|
||||
/sbin/iptables-restore < /etc/sysconfig/iptables
|
||||
/sbin/service ipsec restart
|
||||
/sbin/service xl2tpd restart
|
||||
echo 1 > /proc/sys/net/ipv4/ip_forward
|
||||
EOF
|
||||
|
||||
if [ ! -f /etc/ipsec.d/cert8.db ] ; then
|
||||
echo > /var/tmp/libreswan-nss-pwd
|
||||
/usr/bin/certutil -N -f /var/tmp/libreswan-nss-pwd -d /etc/ipsec.d
|
||||
/bin/rm -f /var/tmp/libreswan-nss-pwd
|
||||
fi
|
||||
|
||||
# Restore SELinux contexts
|
||||
restorecon /etc/ipsec.d/*db 2>/dev/null
|
||||
restorecon /usr/local/sbin -Rv 2>/dev/null
|
||||
restorecon /usr/local/libexec/ipsec -Rv 2>/dev/null
|
||||
|
||||
/sbin/sysctl -p
|
||||
/bin/chmod 600 /etc/ipsec.secrets /etc/ppp/chap-secrets
|
||||
/sbin/iptables-restore < /etc/sysconfig/iptables
|
||||
|
||||
/sbin/service ipsec restart
|
||||
/sbin/service xl2tpd restart
|
||||
Loading…
Reference in New Issue
Block a user