# IPsec/L2TP VPN Server Auto Setup Scripts

*Read this in other languages: [English](README.md), [简体中文](README-zh.md).* Scripts for automatic configuration of an IPsec/L2TP VPN server on Ubuntu 16.04/14.04/12.04, Debian 8 and CentOS 6 & 7. All you need to do is providing your own values for `IPSEC_PSK`, `VPN_USER` and `VPN_PASSWORD`, and let them handle the rest. We will use Libreswan as the IPsec server, and xl2tpd as the L2TP provider. #### Link to my VPN tutorial with detailed instructions ## Features - Fully automated IPsec/L2TP VPN server setup, no user input needed - Encapsulates all VPN traffic in UDP - does not need ESP protocol - Can be directly used as "user-data" for a new Amazon EC2 instance - Automatically determines public IP and private IP of server - Includes basic IPTables rules and `sysctl.conf` settings - Tested with Ubuntu 16.04/14.04/12.04, Debian 8 and CentOS 6 & 7 ## Requirements A newly created Amazon EC2 instance, using these AMIs: (See instructions) - Ubuntu 16.04 (Xenial), 14.04 (Trusty) or 12.04 (Precise) - Debian 8 (Jessie) EC2 Images - CentOS 7 (x86_64) with Updates HVM - CentOS 6 (x86_64) with Updates HVM **-OR-** A dedicated server or KVM/Xen-based Virtual Private Server (VPS), with freshly installed: - Ubuntu 16.04 (Xenial), 14.04 (Trusty) or 12.04 (Precise) - Debian 8 (Jessie) - Debian 7 (Wheezy) » Not recommended. Requires this workaround to work. - CentOS / Red Hat Enterprise Linux (RHEL) 6 or 7 OpenVZ VPS users should instead try Nyr's OpenVPN script. **» I want to run my own VPN but don't have a server for that** :warning: **DO NOT** run these scripts on your PC or Mac! They should only be used on a server! ## Installation ### Ubuntu & Debian First, update your system with `apt-get update && apt-get dist-upgrade` and reboot. This is optional, but recommended. ```bash wget https://github.com/hwdsl2/setup-ipsec-vpn/raw/master/vpnsetup.sh -O vpnsetup.sh nano -w vpnsetup.sh [Edit and replace IPSEC_PSK, VPN_USER and VPN_PASSWORD with your own values] sudo sh vpnsetup.sh ``` ### CentOS & RHEL First, update your system with `yum update` and reboot. This is optional, but recommended. ```bash yum -y install wget nano wget https://github.com/hwdsl2/setup-ipsec-vpn/raw/master/vpnsetup_centos.sh -O vpnsetup_centos.sh nano -w vpnsetup_centos.sh [Edit and replace IPSEC_PSK, VPN_USER and VPN_PASSWORD with your own values] sudo sh vpnsetup_centos.sh ``` If unable to download via `wget`, you may alternatively open vpnsetup.sh (or vpnsetup_centos.sh) and click the **`Raw`** button. Press `Ctrl-A` to select all, `Ctrl-C` to copy, then paste into your favorite editor. ## Next Steps Get your computer or device to use the VPN. Search the web for instructions, e.g. google.com/search?q=setup+l2tp+client Enjoy your very own VPN! :sparkles::tada::rocket::sparkles: ## Important Notes For **Windows users**, a one-time registry change is required if the VPN server and/or client is behind NAT (e.g. home router). In case you see `Error 628`, go to the "Security" tab of VPN connection properties, enable `CHAP` and disable `MS-CHAP v2`. **Android 6 (Marshmallow) users**: Edit `/etc/ipsec.conf` and append `,aes256-sha2_256` to both `ike=` and `phase2alg=`. Then add a new line `sha2-truncbug=yes`. Indent lines with two spaces. Finally, run `service ipsec restart`. **iPhone/iPad users**: In iOS settings, choose `L2TP` (instead of `IPSec`) as the VPN type. To enable multiple VPN users with different credentials, just edit a few lines in the scripts. Clients are configured to use Google Public DNS when the VPN is active. To change, set `ms-dns` in `options.xl2tpd`. For servers with a custom SSH port (not 22) or other services, edit the IPTables rules before using. The scripts will backup existing config files before making changes, with `.old-date-time` suffix. ## Upgrading Libreswan The additional scripts vpnupgrade_Libreswan.sh and vpnupgrade_Libreswan_centos.sh can be used to periodically upgrade Libreswan to the latest version. Check the official website and update the `SWAN_VER` variable as necessary. ## Bugs & Questions - Got a question? Please first search other people's comments in this GitHub Gist and on my blog. - Ask Libreswan (IPsec) related questions on the mailing list, or read these wikis: [1] [2] [3] [4] [5]. - If you found a reproducible bug, open a GitHub Issue to submit a bug report. ## Author ##### Lin Song - Final year U.S. PhD candidate seeking opportunities in Software or Systems Engineering. - View my LinkedIn profile and contact me: www.linkedin.com/in/linsongui ## License Copyright (C) 2014-2016 Lin Song

Based on the work of Thomas Sarlandie (Copyright 2012) This work is licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported License Attribution required: please include my name in any derivative and let me know how you have improved it!