Configuration examples

Below are the most common type of IPsec configurations people use. While written for libreswan, the instructions will work for openswan as well unless specifically noted.

host to host VPN

subnet to subnet VPN

subnet to subnet VPN with PSK

VPN server for remote clients using IKEv1 XAUTH

Using XAUTH with One Time Passwords (OTP)

subnet extrusion

Using Apache to serve PKCS#12 format .p12 files