eth0 problem...

Rede · n00b Joined: 03 Jun 2007 Posts: 67

I don't know what happened but I restarted my computer this morning (all was working fine till I did this) and when it came back online I can no longer connect to the internet.

When booting up it displays the following:

ZeuZ_NG · Posted: Thu Oct 02, 2008 3:44 am Post subject:

Well, what's the output of ifconfig -a about it?
Also, is your nameserver located at /etc/resolv.conf ?
have you tried running dhcpd/dhclient again after you finished the boot-up process? Perhaps it's a problem of some daemon/process not behing ready...

EDIT:
Also, can you ping your router? or any other host on the lan?
_________________
| Intel Core i7 920. | Intel DX58SO Extreme. |
| 8gb DDR3 1666mHz | 1TB 7200 RPM WD HDD.|
Unix´s guru view of sex:
unzip ; strip ; touch ; grep ; finger ; \
mount ; fsck ; more ; yes ; umount ; sleep.

Rede · n00b Joined: 03 Jun 2007 Posts: 67

Output of ifconfig -a

ZeuZ_NG · Posted: Thu Oct 02, 2008 3:58 am Post subject:

Well, first of all just to clear it was not a typo: it's /etc/resolv.conf
And then, if you can ping hosts in your network, or even the router, but can't get out to the internet, you're lacking to have your nameserver located in /etc/resolv.conf
The syntax of resolv.conf is single:
nameserver XXX.XXX.XXX.XXX

One entry per DNS server, and replace XXX.XXX.XXX.XXX with the corresponding data

Rede · n00b Joined: 03 Jun 2007 Posts: 67

Sorry was a typo on my behalf. It was not there before but after rerunning dhcpcd eth0 I believe it added it.

I am not sure if I will have to kill it and restart it each time I log in though. I am going to restart now. Hopefully not as that will be quite annoying.

Rede · n00b Joined: 03 Jun 2007 Posts: 67

Still having this problem. I can do a quick fix by killing it and restarting it. But if any one has found a fix for this please let me know.

ZeuZ_NG · Posted: Thu Oct 02, 2008 5:44 pm Post subject:

What about adding a "sleep 5" to the top of the script? this will deay it's execution, and therefore, allow us to check if it's something not ready when the daemon is issued.
_________________
| Intel Core i7 920. | Intel DX58SO Extreme. |
| 8gb DDR3 1666mHz | 1TB 7200 RPM WD HDD.|
Unix´s guru view of sex:
unzip ; strip ; touch ; grep ; finger ; \
mount ; fsck ; more ; yes ; umount ; sleep.

Rede · n00b Joined: 03 Jun 2007 Posts: 67

To what script?

ZeuZ_NG · Posted: Fri Oct 03, 2008 3:19 am Post subject:

to net.eth0 or the one regarding the troublesome part...
_________________
| Intel Core i7 920. | Intel DX58SO Extreme. |
| 8gb DDR3 1666mHz | 1TB 7200 RPM WD HDD.|
Unix´s guru view of sex:
unzip ; strip ; touch ; grep ; finger ; \
mount ; fsck ; more ; yes ; umount ; sleep.

Rede · n00b Joined: 03 Jun 2007 Posts: 67

I added "sleep 5" to net.eth0, restarted and the problem still exists.

Would this have anything to do with running dhcpcd-4.0.1?

jamapii · l33t Joined: 16 Sep 2004 Posts: 637

As we have seen, the problem is that resolv.conf is empty.

I think it will be overwritten on any restart, so this must be prevented or something useful injected.

It also seems that an older version of dhcpcd does not have the problem.

So your options are:

- revert to dhcpcd-3

- (if your nameserver does not change) have a static /etc/resolv.conf, by inserting this at the top of /etc/resolvconf/update.d/libc if you use openresolv

psyic · n00b Joined: 18 Nov 2007 Posts: 3

I am having essentially the exact same problem, except I am running dhcpcd 4.0.2.

I have to kill -9 the pid of dhcpcd running and then renew the lease on eth0 to get it to work at all past a fresh reboot.

Cheers

logginski · n00b Joined: 21 Oct 2008 Posts: 1

I am having exactly teh same problem.

Its caused by dhcpcd when it tries to get a new lease. It overwrites /etc/resolv.conf even if it gets no DNS info. This kills the DNS I got via pppoe.

I regard this as a bug, or at least as a optional feature, to turn dhcpcd in a state where it will only overwrite (better: append) /etc/resolv.conf if it gets an actual DNS server.

*Please* someone, could you help me? Its a laptop and it travels a lot between home, working app., and different work grounds.

tylerwylie · Posted: Tue Oct 21, 2008 2:55 am Post subject:

Do you have nodns specified in your network configuration file?