DNS settings on Linux

grob115 · 05-01-2012, 06:16 AM

Hi, can someone advise on the following. Thanks.
1) Is the /etc/resolv.conf related to the DNS settings applied in System -> Preferences -> Network Connections -> Wired tab -> eth0?
2) If I do "dig www.msn.com" it doesn't resolves anything but "dig @<DNS IP> www.msn.com" would work fine. Any idea how I can set it to look up the DNS servers automatically?

acid_kewpie · 05-01-2012, 07:03 AM

1) yes, that gui should update resolv.conf
2) put them in resolv.conf

lleb · 05-01-2012, 10:43 AM

yes the /etc/resolve.conf should look something like the following:

Code:

$ cat /etc/resolv.conf 
# Generated by NetworkManager
domain rx30.com
search rx30.com localhost
nameserver 10.10.0.20
nameserver 10.10.0.21

you can have one as simple as:

Code:

nameserver 8.8.8.8

That is just google's DNS that will work too.

grob115 · 05-06-2012, 10:09 AM

Thanks guys but for some reason when I made the settings in System -> Preferences -> Network Connections -> Wired tab -> eth0, it doesn't update the /etc/resolv.conf file. Any idea? Also, even after manually putting the DNS servers into the /etc/resolv.conf file, dig still wouldn't work unless I explicilty specify them. Anywhere else I can check?

John VV · 05-06-2012, 03:10 PM

the gui depends on your system AND how the network is set up
if using ifup / ifdown or "networkmanager"

on my suse 11.4 i am using ifup
so one of the two the gui's will not work