I've just returned home from a 3 month absence and cannot get internet access through my Linksys WRT54GS router from my wireless laptop. I have three computers hard wired to the router with good internet access. The laptop connects to the router with no problem but once connected, I can see my home network but cannot get access to the internet.
I've reset the router and tried allowing the laptop (Windows Vista) to fix the interconnection the following message: "Cannot communicate with Primary DNS Server(192.168.254.254)". Resetting the network adapter does not fix the problem. If I connect the laptop to the router with a network cable, everything works fine.
Finally, before I left in June, I had wired in an access point using a second WRT54GS router configured as an access point. For the moment, I've disconnected the access point from the network.