Christian,
If you just have one Zyxel router, with no ADSL modem, you shoult try to configure your Zyxel router to do nothing.
So open router web interface , go to Advanced Setup, SUA Applications,
and as default put your SME server ip address!
This will do everything go to your SME server.
If you have another configurations on slots 2-8 you should be sure them are pointing to your SME server or what you know why not!
You could erase them but write down everything on a piece of paper before just in case.
I have done this one a 642R and it´s working. If you need some help , write a e-mail to me!
I hope you´re working in a few minutes after receive this!
Good luck!
Jáder
Author: Christian Passarelli
> Someone can help me in configuring Zyxel router correctly so
> that only SME server will act as a firewalling and also to
> have services (web, mail) available from outside lan
> (internet)?
Author: Charlie Brady
> Configure the Zyxel router by carefully packing it into a cardboard box and
> placing it in the second drawer of your desk. Then connect the ethernet cable to > your ADSL modem, and configure the SME server via