Here's my configuration: I have a virtual host on VMWare (Windows 2003 Server) where I have all my preview sites for clients and customers; the IP address is 192.168.0.30 and the router is a Netgear DGN2000, changed just today since my "old" Netgear DG834G broke; through No-IP services I used to create sites like, say, "mysite.no-ip.org" and it was easy to provide preview for customers: all was fine and working.
Now, the only thing that changed is the router; of course I port forwarded the port 80 to the 192.168.0.30 computer and unblocked the firewall, and even put the 192.168.0.30 PC in DMZ
Well, If I go to "http://mysite.no-ip.org
" through a PC that is not in my LAN (I did a try with my Nokia smartphone) all is right and I can see the site. Even my customers can see the site, they confirmed me.
If I go to "mysite.no-ip.org" (or other sites I setted) from any PC of my LAN, the site is unavailable: for some sites I get a Google page, for other sites I get a strange page from "http://searchportal.information.com
The only exception is the server itself, where I can access the site(s), but I guess that's because I modified the hosts file: 127.0.0.1 mysite.no-ip.org (I tried 192.168.0.30 mysite.no-ip.org before, but no luck)
This seems totally mad to me, have you got some idea?