DNS resolution - no internet

Qweasda · Apprentice Joined: 04 Feb 2003 Posts: 152

Hi, I installed the 2.6-test2 kernel (my first 2.5/6 dev kernel) and the (natsemi) NIC worked, I coukd ping 127.0.0.1, it showed in ifconfig -a, but no internet works.

So I went back to 2.4, and a coupld days later recompiled the 2.4 kernel using the same config, only added 2 USB options is all. Now I have the same internet problem in that. I recompiled without those options, no luck. I have been Gentoo-less for over a week now, desperate.

taskara · Posted: Sun Aug 10, 2003 8:39 am Post subject:

so the 2.4 kernel WAS working, then u changed something (USB stuff) and now internet doesn't work, is that right?

what does ifconfig -a reveal in the new kernel?
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ewildgoose · Tux's lil' helper Joined: 02 Mar 2003 Posts: 75

I think I have a very similar problem, see:
https://forums.gentoo.org/viewtopic.php?t=73685

However, so far I haven't had a nibble...

Try this for a debug step, use dig to query your ISP's dns server, observe it fail, then try forcing it to use TCP to query it (ie add +tcp to the command line)

For me the tcp version works, but udp is foobar'd

Qweasda · Apprentice Joined: 04 Feb 2003 Posts: 152

ifconfig -a in 2.6 shows me this:

handsomepete · Posted: Sun Aug 10, 2003 6:56 pm Post subject:

Your card isn't up or running - that might be part of the problem. Should look something like this:

Qweasda · Apprentice Joined: 04 Feb 2003 Posts: 152

Okay, here's a better, more detailed listing...

handsomepete · Posted: Sun Aug 10, 2003 8:26 pm Post subject:

Is that the correct gateway IP? If it is, maybe change your IP to 192.168.0.100 instead of 192.168.1.100. It's good to have those first 3 sets of numbers match up.

Qweasda · Apprentice Joined: 04 Feb 2003 Posts: 152

Oops, that was the wrong gateway, mine's 192.168.1.1. I tried that but got the same results.
Changing .0.100 to .1.100 didn't do anything else either. It's always been .0, though.

I have tried to recompile my kernel from scratch, brand new .config and all, no luck. 2.6 must have done something to it. When I cooied 2.6 (bzImage-26) to my boot partition, I also copied system.map.
I have no idea what that does but the docs said to..that couldn't have had an affect could it?

taskara · Posted: Sun Aug 10, 2003 11:12 pm Post subject:

according to this

Qweasda · Apprentice Joined: 04 Feb 2003 Posts: 152

taskara · Posted: Sun Aug 10, 2003 11:32 pm Post subject:

well you aren't getting an IP then from your DHCP server..

can u try specifying an IP?

what sort of network are you on?

net.eth0 is still in the default run level isn't it?

and your /etc/conf.d/net is set to "use dhcp" ?

I'm assuming so, because all u have changed is your kernel, but still pays to be sure

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Qweasda · Apprentice Joined: 04 Feb 2003 Posts: 152

The only way I've ever gotten specify IP to work is if I plug the modem right into my box bypassing the router. I can try this tomorrow maybe, when everyone isn't using the internet.

My network is just a Linksys router.

net.eth0 is in the default run level, just checked to make sure, and it also always shows the "Bringing up eth0...OK"

Yep, /etc/conf.d/net is set to dhcp.

Could the new kernel somehow killed some network app or overwrote something? Sounds stupid, but I'm getting desperate....

I just recompiled 2.4.20 (after make clean and mrproper) with absolutely nothing changed from default settings minus what the install docs say (filesystems, and IDE stuff), my network card, and Reiserfs support. I even downloaded a fresh copy if ther kernel. Still a no go.

taskara · Posted: Mon Aug 11, 2003 1:44 am Post subject:

ok - well maybe the router is not handing out ip addresses properly?

why don't you try specifying an ip address?

what is the address of your router?

192.168.0.1 ?

if so, under your /etc/conf.d/net specify an ip address like 192.168.0.10 or something

gateway is your router (ie 192.168.0.1)

and make sure /etc/nameserver is set to your router too

then restart your network and see if "ifconfig -a" reveals eth0 with an ip address

good luck!

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0ctane · Posted: Mon Aug 11, 2003 12:24 pm Post subject: ipv6 possibly?

I am having similar troubles (and am writing this from my wife's Windoze box). I was updating mplayer (which needed to emerge 37 packages and failed when trying to update xmms). I got a message that a bunch of config files needed to be updated. So I looked at them. One of them was /etc/hosts and in it was ip6 stuff (fe00::0 ip6-localnet and others). So I figured, what the hell, I'll give it a try. After rebooting I cannot get out of my local network. I can ping my D-link router fine, but any attempt to go to the outside word (cable modem) gives "network unreachable". ifconfig shows my nic. /etc/resolv.conf has the correct nameservers.
Any ideas?
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taskara · Posted: Mon Aug 11, 2003 1:27 pm Post subject:

can u post

0ctane · Posted: Mon Aug 11, 2003 10:14 pm Post subject:

ifconfig -a results

taskara · Posted: Mon Aug 11, 2003 10:53 pm Post subject:

you're not running iptables or anything are you?

can u ping yourself?

can u ping your router?

can anyone ping you?

I notice you have received a few packets, but haven't transmitted any..
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0ctane · Posted: Mon Aug 11, 2003 10:55 pm Post subject:

I can ping myself and the router.
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0ctane · Posted: Mon Aug 11, 2003 11:23 pm Post subject:

Fixed my problem. I looked at the x86 installation page for the idea. I figured it had something to do with DNS name resolution, and I knew my /etc/resolv.conf was setup properly. Anyhow, I ran the following command and everything now works.

taskara · Posted: Mon Aug 11, 2003 11:44 pm Post subject:

can u ping an external ip address.. like 66.218.71.93 ?
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taskara · Posted: Mon Aug 11, 2003 11:48 pm Post subject:

cool

that was where I was leading

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0ctane · Posted: Tue Aug 12, 2003 12:16 am Post subject:

unfortunately, it does not seem to hold after a reboot. I have to run the command again. hmmm...
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linux_weenie · Guru Joined: 25 Jun 2003 Posts: 365

try uncommenting

iface_eth0="dhcp" from your /etc/conf.d/net file. hope that helps you out.

-Will
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taskara · Posted: Tue Aug 12, 2003 1:25 am Post subject:

Qweasda · Apprentice Joined: 04 Feb 2003 Posts: 152

I'm getting aggrivated with this. Tomorrow, if not solved, I'm going to reformat and reinstall my 15gb's of Gentoo goodness.

I tried a specified IP, anyhoo. With it, ifconfig shows eth0, with the IP, so I don't need the -a option. Still no internet though.
dhcpcd eth0, btw doesn't work (set to dhcp in net or using static)
Once again with the static IP I can ping myself, and the router.

Any last ideas? almost 3 weeks w/o Gentoo is driving me insane. (useless without internet!)