The use of IPSEC transport mode for server to server communication is one of the best solutions to provide authentication, integrity, access control, and confidentiality. IPSEC is built into to the Linux kernel, in other words there is no daemon running in the background. IPSEC does not require port-forwarding; some people elect to use SSH,…
Prepare the rp-l2tpd Server To configure the rp-l2tpd VPN server, we need a Linux system with least of two network interfaces. I use CentOS 5 Linux operating system for my VPN installation. You can also use other Linux’s flavors, but avoid using Fedora Core 8. Fedora Core 8 has some bug in pppd that doesn’t…
L2TP (Layer 2 Tunneling Protocol) L2TP (Layer 2 Tunneling Protocol) is a tunneling protocol used for VPN. It uses the UDP port 1701 to communicate. It doesn’t have any encryption, but we can encrypt the L2TP packets by using it with IPSec. For theoretical information on L2TP you can visit its Wiki. In Linux, you…
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