This guide applies to the ZyXEL ZyWALL USG product range. These support VPNs with X. 509 certificates and are not limited to pre-shared key authentication. Thusbypassing the restrictions described under Section 43.6, „Limitations“.

The router supports self-signed certificates as well as being able to produce them itself. This significantly reduces setup time.

The Intra2net system can of course also support connections with other routers. However, this router is described in more detail as it is relatively inexpensive and readily available compared to other routers with X.509 certificate support.