Web server access

[Van Snyder <van.snyder@sbcglobal.net>]

This might be the wrong forum for this question, but most likely somebody can tell me a better place.

I have a web server listening to port 80 (http) and 443 (https).

I can load pages from it from any computer in my house, all behind the same router, using its IP number.

I enabled port forwarding in the DMZ in my router for ports 80 and 443.

I can't load pages through my router using its WLAN name or WLAN IP number. I get "Unable to connect" from Firefox. or "This site can't be reached"  and ERR_ADDRESS_UNREACHABLE from Konqueror.

I have mapped port 8079 to port 80 in my router. I can't load pages using that mapping.

I also map an external port (not 22) to port 22, and I can "ssh" to my computer using its WLAN name.

I have cleared browser caches. I have restarted the router. I'm not using a proxy server.

This was all working until about three weeks ago. I didn't change the firmware in my Linksys.

Any ideas?