[CentOS] DNS update system-config-network GUI

Phil Savoie psavoie1783 at rogers.com
Thu Nov 18 12:18:54 UTC 2010

On 11/18/2010 07:09 AM, Lanny Marcus wrote:
> Box is fully updated CentOS 5.5 (32 bit). DHCP is from the ADSL modem
> After I update the DNS settings and restart the network,
> the DNS changes do not hold. I have tried using this GUI, as a regular
> user, after giving the root password, and, also, logged in as the root
> user.
> When I begin, the Primary DNS is shown as the IP of the
> ADSL modem. I move that IP to the Tertiary DNS and insert the Primary
> and Secondary DNS IP's I want to use. Then, I save the file, quit, and
> restart the network (service network restart). I see messages that the
> file has been saved and suggesting that I restart the network or the
> box.
> The DNS I want to use is that of OpenDNS.com and I saw it work,
> briefly.Then,it stops working and when I launch the
> system-config-network GUI  again, I see it has reverted to the
> original configuration, with only the Primary DNS of (the
> ADSL modem) shown.
> Questions: The "DNS Search Path" is blank. Is there something I should
> insert there?
> If it appears that I am using the system-config-network GUI properly,
> what configuration file can I modify, to make these DNS changes hold
> permanently?
> TIA!  Lanny
> http://www.magazines-magazine.com/

Hi Lanny,

What if you manually edited resolv.conf and hard coded the dns info you 
want to use and in the /etc/sysconfig/network-scripts/ifcfg-eth0 file 
add "PEERDNS=NO" without the quotes.  Restart network service or 
ifdown/up eth0.

May help.


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