![]() ![]() ![]() Iptables -A INPUT -p udp -m udp -dport 1701 -j ACCEPT Iptables -A INPUT -p udp -m udp -dport 4500 -j ACCEPT Iptables -A INPUT -p udp -m udp -dport 500 -j ACCEPT If you are using iptables, run the following commands to apply the required rules immediately: Next, let’s configure some firewall rules to allow the redirection of the web traffic. Run /etc/vpn-setup once, manually for now, so to apply these settings for the current session, then restart IPSec: service ipsec restart This is required to redirect all the Internet traffic through the L2TP IPSec VPN gateway to ensure the commands in the file are executed at startup, edit /etc/rc.local and add, before the exit 0 line, /etc/vpn-setup. Making sure you make this file executable with: chmod +x /etc/vpn-setup Now create the file /etc/vpn-setup and paste the following in it: #!/bin/bash Next, edit /etc/crets and add the following: (server's public IP) %any: PSK "Your shared secret"Īgain, you will have to specify here the public IP of the server and also a shared secret that will be used on clients together with the credentials for each specific client account. Obviously, replace the value for the left setting with the actual public IP of the box on which you are installing the L2TP IPSec VPN server. ![]() I’ll paste below the settings I currently use on 5 L2TP IPSec VPN servers and that I know work for sure you may want to empty those files before pasting the configurations I suggest, just to keep things simpler.įirst, edit /etc/nf and change/add the following settings: version 2.0 Next you’ll need to edit a few configuration files. If you, like me, want an L2TP IPSec VPN compatible with iPhones/iPads and other devices, answer No since these typically do not support setups with certificates. You will be asked Do you have an existing X509 certificate file that you want to use for Openswan?. To set up an L2TP IPSec VPN, you’ll need to install OpenSwan, which is an IPSec implementation for Linux IPSec is responsible for the encryption of the packets. Hopefully this will help you save some trial and error I won’t go in the details for each setting or command as I am myself not too familiar with several of them so if you just want a “fast-track” how-to here you are. The process should be very similar with other Linux distributions. So here’s a simple guide on how to set up an L2TP IPSec VPN on a Ubuntu server and get both a Mac and an iPhone connected. This is a plus, since it means I can also configure a VPN access on my iPhone without having to jail break it or install third party apps to be able to use another VPN. These VPNs are IMO simpler to setup, secure, and compatible with most operating systems and devices without requiring additional client software in order to establish the connection. So the VPN I use must also be compatible with these devices, and that’s why I have replaced my long time favourite OpenVPN with an L2TP IPSec VPN on each of my servers. Gmail and many sites I need use SSL, but nevertheless using a VPN gives peace of mind since you don’t have to worry as much about how much attention has been paid to the security aspects of these services, at least as far as the encryption of the data is concerned. I also own an iPad and an iPhone so I prefer having a private connection when I am on the move and need to surf the Internet or just check my emails, but have to use some network over which I have no control. I know that there are reasons for these geographical restrictions, but that’s not the point of this article ). I also want to be able to watch live TV programs from various countries regardless of where I am in most cases live TV is only available in the country of origin, therefore without a VPN or similar solutions it is not possible to watch them from elsewhere, using the original websites. ![]() I use VPNs all the time these days to access resources that I have restricted on the servers I manage. ![]()
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