This instruction shows the first step-by-step IPSec configuration via the HTML-Wizard to enable a secure connection between two networks. This instruction shows an example configuration of a X1200II (Image 7.2.1 patch9) with DynDNS and Preshared Keys. The second router (e.g. VPN25) is configured equal to the X1200II. 

This instruction shows the step-by-step configuration of an IPSec backup with a direct ISDN dial-up to the IPSec remote site. In this case a VPN 25 dials up to a X1200 II. Both devices have revision 7.1.12.

This instruction shows the step-by-step IPSec configuration of a  Bintec router to establish a secure connection between a branch office and the head office (example with image 7.1.12p1 IPSec). Preshared Key is used for authentication.

This FAQ is a short introduction of PKI (Public Key Infrastructure) and certificates and shows the step-by-step configuration of a LAN-to-LAN connection with the usage of certificates.
The authentication method in this case is RSA-Signature.
The configuration is illustrated with a X1200 and a X4100 with SW-Release 6.3.4 beta 4 IPSec.