This is a Windows Svr 2003 /sp2. It has dual Nics on two different networks. The server is running as a intranet file server and as an internet/intranet mail server. Remote desktop is enabled. The server is connected to the internet via NIC 1 to a switch with the local network users, this is connected to a router and a cable modem. All of the appropriate ports are forwarded on the router to send and recieve mail and forward Remote desktop to the server.
The second NIC is going to a DSL router again with all the correct ports forwarded.
Sympthom: everything works fine. then suddenly. The server will not accept traffic on one of the NICs from the web. local users can still use the network. But I can use remote desktop from within the network. to the server but not from outside. I logonto the server on the other nic and disable then reenable the NIC in question. everything works again.
Puzzleing things it does this with both NICS