|Hi Geolew, |
Being a western Canadian, I'm a Telus customer too.
We don't have a Seimens based device with our present Telus WAN connection but it seems to me, you should probably be sticking your web server in the DMZ. So, how this is done with that particular piece of equipment, I can't say. But, the manual or their tech support (ok, I know what it's like calling Telus tech support, but if it comes down to it, you'll have no choice and have to call them) should be able to provide you with that information.
Port forwarding is used to pass things through your firewall. Web server's and external servers/devices should always be in the DMZ which is outside the firewall.