Ubuntu Networking :: 'Resolving Hosts' On Lucid - Pinging Self On WAN Temporarily Fixes

So I've been reading around a bit, and have found a few fixes for this Resolving Hosts problem, but none of them have fixed mine yet. Basically what happens is all browsers fail to load pages, pinging local network works, but pinging default gateway doesn't. Cannot ping external websites and cannot reach update or upgrade servers for ubuntu. All networking works as normal on all other PCs in house, as well as the windows 7 boot I have on my ubuntu PC.

What I've tried:Disabled IPv6 completely by preventing the module from booting up Manually setting network settings instead of using the router's DHCP server Changing DNS servers from ISP to Google public DNS to OpenDNS Buying a new ethernet card And a few other things I can't remember off the top of my head, none of which worked. From memory, all this just started happening out of the blue. I recently changed from Windows to Ubuntu, and was enjoying the switch but all of a sudden I couldn't get on the internet on Ubuntu.

Now, I'm not sure why, but I decided to ping myself. Not my LAN ip, but our router's WAN ip. It worked, albeit took a little while to return a response the first packet, but each subsequent packet after that was a normal speed (~0.5ms). The strange thing about this was that I found that for a few seconds after pinging myself, I could access the internet. After a few seconds though, it returns to it's resolving hosts self again, which another self-ping would fix.

Consequently, in order to browse, I have an open terminal constantly pinging myself which appears to be working. Not ideal, and certainly not something I would like to keep doing for long, but it works for now. I really like Ubuntu, but if I can't get this net thing fixed, I can't finish moving over from Windows!