Okay, so I got a small network setup by my ISP provider with a Zyxel router. It runs wirelessly with 2 laptops and a XBOX connected to it. It has run flawless for years but then suddenly two days ago my sisters computer wouldn't receive a ip adress, it usually just gives a 192.168.0.* adress but instead it gave a 169.254 adress. Since she hadn't really taken care of her computer we decided to just format her harddrive and reinstall windows (xp sp2). But still she couldn't get a proper ip adress. At this point my pc worked just fine in both win xp and ubuntu. But then today my computer had the same problem so i started researching. I've tested it with 3 different computers on 2 different OSes. None of them working. Plus my brothers Xbox have not been able to connect to the internet either. So I'm faily sure it has something to do with my router. But all the setup is done properly, I've changed nothing and it looks as if it should be working. I've read litteraly every post on this site I could find about the topic and i know what the 169.254 adress is used for and I've tried every fix i could find for this problem from resetting my router and access point to resetting winsock. Can it be that it's my ISP that's something wrong with? I can connect with my wired connection, but that's it. I'm no pro with networking, and not at all in ubuntu. Just wondering if anybody has a hot fix laying around Thanks in advance Cheers

I would suggest your router is probably on it's last legs and in need of replacement. You could try power cycling it (ie: shut it off, wait 10 second, then plug it back in) and see if that doesn't fix the problem. If not, you could try resetting it to factory defaults and see if that fixes the problem. If neither fixes the issue, it's toast, time to buy a new one. If power cycling works, it'll likely only work for a while and then it will stop working properly again. The same is true for resetting...if will likely only work temporarily, if at all.

After you've resetted your router, did you connect a laptop or pc by wire, because your wireless settings in the router are also resetted to the default settings. Please send a reply, if you solved the problem !!!