Accessing your SSH server through your WAN IP from your LAN through a ZyXEL P660 HW1

All this time I was under the impression that this router did not support NAT loopback, which is kind of annoying. What a mistake!

Apparently, you can turn nat loopback on. Telnet to the router:

    telnet 192.168.1.1

and enable nat loopback:

    ip nat loopback on