That is the router I have. On the back there are 4 LAN ports and another port labled Internet. My setup had the cable from the modem feeding into that port and everything worked until a couple of days ago. Today I switched that cable to a LAN port and everything worked again. I asked in another thread the purpose of the internet port and MR Butash gave me an answer but it is still a lot hazy. In my research to answer the question myself I found a wikipedia article that states:

The original WRT54G was first released in December 2002. It has a 4+1 port network switch (the Internet/WAN port is part of the same internal network switch, but on a different VLAN).

My questions: What is that port for if not to be an input port for the internet

and

Why was it working as an input port for the internet and why did it stop working as such?

:-)~MIKE~(-: