Hey folks, I've been trying to read up on this, but I did not really know how to word my issue into a google search and nothing I looked for yielded any results. I figure mayhaps one of you fine gents could help me out.

Long ago, I used to be able to plug in both my Xbox Live and PC internet cables into my router, and both word work perfectly fine.

I just recently reacquired Xbox Live and to my dismay when I plug both into the router, only one or the other works. Its a bit of an odd situation with DNS identification.

If I reboot the modem with the pc cable in it, once its loaded up, I can browse the net on my PC. However, on my X360 it recognises the IP, but fails the DNS Test.

However, if I reboot the modem with my x360 plugged in, all tests will pass but not I cannot browse the net on my PC.

Now, if I try have my router plugged in, and both plugged in, when I reboot the modem it'll random work for one or the other. Once its up its a toss up on whether its going to be my Live or PC working.

I'm not knowledgeable when it comes to internet connections.

If anyone has any insight on what my problem might be, I'd welcome the advice.

That's odd crap. Maybe try a different router, maybe it's just broken somehow? Or did you update the firmware?

It's definitely the router. I'm just not smart enough to answer more

EDIT: Try unplugging it for 5 or 10 seconds and plug it back in. This will reset any wireless protections though.

Its probably the router. Its a....10 year old linksys modem. But it used to work!

Your internet router is from 1998?

Last time I saw one of those, I fell off my dinosaur.

Mine is really old, too. REVISION B. Supposedly I should get a new one. It may explain why my roku box gets 1star quality on wireless and always 4star on wired. Pah.

Are you sure it's actually a router and not just a cable modem? >.>

No, no, it is a router. Like I said before, it used to work last summer. So I don't know what the hell went down with it.

My connection is just being wierd.

If I initialize the modem with PC plugged in, then I can browse the net on the PC, but I cannot connect to xbox live. If I then unplug from the modem and plug it into the router, its the same thing. Can browse net, cant' connect to live.

If I initialize the modem with Xbox plugged in, then I can connect to Live but I cannot get the net on the PC. If I then unplug from the modem and plug it into the router, its the same thing. Can connect to live, cant browse on PC.

If I leave everything plugged into the router as it should, and initialize the modem, it continues to only work with one or the other of the connections depending on which was initialized on the previous try.

Big WTF.

Not sure how much you'd prefer not to replace the router, but here's my thoughts just-in-case...

I've seen things like this before when a device is setup with a static IP that's not reserved by DHCP, or at least outside of the DHCP scope at least. Are either the XBOX or the PC setup with Static IP/DNS Information, or are both getting their IP information via DHCP from the router?

If DHCP, when you go into the router you should have an option to see the clients (devices) that are connected, and their associated IPs and MAC Addresses (which should be different from each other), or chek the IP address both devices have while they are both turned on to verify the subnet mask, default gateway, and DNS server(s) match each other.

Assuming that the IPs are different, and the Default Gateway and DNS information match, then I would suggest resetting the router to the default settings to clear any mishaps within the router itself. Failing that, my last suggestion before replacing the router would be to verify that the firmware on the router is the latest version. If that doesn't help, then it's down to replacing the router for sure.

Or you could skip right to resetting the router, upgrading the firmware (if it's out of date) and/or replacing the router.