Editing Auto eth0 connection [SOLVED]

[ScottyK]

I worked on this a while back, but just couldn't get it to work.

on a Kubuntu 10.10 box, I'm trying to..

A. Give it a static IP address of 192.168.1.59
B. Change the DNS servers to 208.67.222.222 & 208.67.220.220

First, using kdesudo, I opened up kate and the file at /etc/dhcp3/dhclient.conf

I found the line that started with "prepend domain-name-servers", deleted the IP address of 127.0.0.1 and inserted the above DNS servers.

Saved, rebooted, but no effect.

Then I looked at the file at /etc/resolv.conf, but it was three lines that pointed back to my router.

Looking at the Wired tab for the Network Connections, there simply is NO option to edit the auto eth0! I can make a new one, but if I do, the system keeps reverting back to the auto eth0.

Using the command line, I know I successfully did it back in the 9.10 days, but I simply can't remember the correct file(s)!

[rfakhrai]

Re: Editing Auto eth0 connection

This covered it for me.

[oshunluvr]

Re: Editing Auto eth0 connection

My advice: Remove knetworkmanager completely. Edit /etc/resolv.conf and /etc/network/interfaces manually. Restart the network. Done.

[ScottyK]

Re: Editing Auto eth0 connection

Ok, i looked at the link and followed the instruction (also removing network manager), after restarting the computer, now I have no network connection whatsoever.

Here's the contents of my interfaces and resolv.conf files. Hopefully somebody can see what i did wrong! Thanks.

Interfaces -

auto lo
iface lo inet loopback

# the primary network interface
auto eth0
iface eth0 inet static
address 192.168.1.59
netmask 255.255.255.0
gateway 192.168.1.254

resolve.conf

# Generated by NetworkManager
nameserver 208.67.222.222
nameserver 208.67.220.220
nameserver 192.168.1.254

[oshunluvr]

Re: Editing Auto eth0 connection

Is the 192.168 address a router? If you're connecting via a router, the router needs to have the DNS addresses in it and your local nameserver is the router.

domain home
search home
nameserver 192.168.1.254

Also, check your route route -n and make sure your router is connected to your NIC

:~$ route -n

Kernel IP routing table
Destination   Gateway     Genmask     Flags Metric Ref  Use Iface
192.168.1.0   0.0.0.0     255.255.255.0  U   0   0    0 eth0
169.254.0.0   0.0.0.0     255.255.0.0   U   1000  0    0 eth0
0.0.0.0     192.168.1.254  0.0.0.0     UG  100  0    0 eth0

[Detonate]

Re: Editing Auto eth0 connection

What router do you have? On my WRT54g the Gateway is 192.168.1.1, not 192.168.1.254 as you have in your interfaces file.

[rfakhrai]

Re: Editing Auto eth0 connection

Yes, the gateway address seems suspect.

[ScottyK]

Re: Editing Auto eth0 connection

I just went over to the windows computer and verified the default gateway, and it is .254 (We have AT&T U-verse)

Connection-specific DNS Suffix . : gateway.2wire.net
Link-local IPv6 Address . . . . . : fe80::614e:5c09:b5c3:4b46%11
IPv4 Address. . . . . . . . . . . : 192.168.1.70
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.1.254

oshunluvr - Just verified, and my route -n listing is the same as what you posted above.

Update - went to restart the network via the command line, and got this error..

SI0CADDRT: File exists
failed to bring up eth0

Solved! Went back and looked at the /etc/dhcp3/dhclient.conf, and took out the two name servers I had in there, put back in the default of 127.0.0.1 and now it's working. using the OpenDNS servers I wanted to, and getting out on the internet.