Network Problems

[a12ctic]

I recently installed Fedora 11 and am just having a massive amount of network related problems. Its probably something basic, but I can't efficiently google for a solution. I also can't search the forums. Basically, I can load some websites/servers, but not others. It seems to be random as to which ones I can and cannot. Any input would be greatly appreciated. It happens with yum, as well as firefox.

[Segfault]

You realize you didn't provide much useful information for people to troubleshoot?

Bad ethernet cable maybe?
Two computers on same IP address will cause something like this, too.

Do you see something useful in system log?
Do you see something useful if you open Firefox from terminal?

[a12ctic]

Definitely not, its something that is only replicable in Fedora 11. Also, launching firefox from the terminal wasn't helpful, as it just launched it. Its not a firefox related error, its system wide.

I actually think its a common problem. I'm connected to the router fine. I just don't know where to start looking for the solution.

[Segfault]

Do you see something useful in system log?

Have a look at dmesg, too. Might be some conflict.

[a12ctic]

What log are you interested in seeing? Give me an example for an input/something I should be searching for.

Nothing seems to be out of order in dmesg.

[Segfault]

From terminal:

sudo tail -f /var/log/messages

Now try to browse internet. Do you see something related to your problem in terminal?

Also, can you access other computers on your LAN (if any)?

[a12ctic]

Yeah, I have my EEE PC and another box running Zenwalk. Then I also have my Nokia e63. None of them are encountering a simlar problem. This is whats coming up in messages.

Jul 29 05:46:09 Andrew-PC dhclient: DHCPREQUEST on eth0 to 172.16.0.1 port 67
Jul 29 05:46:09 Andrew-PC dhclient: DHCPACK from 172.16.0.1
Jul 29 05:46:09 Andrew-PC dhclient: bound to 99.150.123.189 -- renewal in 299 seconds.

Its repeated several times.

[Segfault]

OK, I think we have found the culprit.

172.16.0.1 is a private address, DHCP server at this address cannot assign you 99.150.123.189 because it's a public address.
There's something seriously wrong with your router (or you have a pirate DHCP server on your LAN)?
What's your LAN setup, what address range are you using? If I recall correctly 172... is used by default if network is not available.

Edit: May it be you are running DHCP server in your Fedora box? It may be it is trying to get an IP address from itself.

[a12ctic]

172.16.0.1 is the router. Then the router assigns the members of the network addresses starting at 172.16.0.30.

Edit, I think I got it. I over rid the DNS. Not sure why it worked this time around, it definitely didn't the last time I tried.

[Segfault]

In any case, looks like using a static IP address would solve your problem.