DNS Settings lost after reboot

I had a similar issue where my DNS was being overwritten after every restart with old DNS causing a failed system.

Every time I would update it via the System Admin it would update resolve.conf and it would work fine until a reboot.

I believe I finally tracked it down to being hard coded in:

/etc/sysconfig/network-scripts/ifcfg-eth0

 DEVICE=eth0
 BOOTPROTO=manual
 ONBOOT=yes
 IPADDR=10.0.1.27
 NETWORK=10.0.1.0
 NETMASK=255.255.255.0
 DNS1=8.8.8.8
 DNS2=8.8.4.4

See this page for details on how to config:
http://ask.xmodulo.com/configure-static-dns-centos-fedora.html

piyushaghera:
It sounds like you are having a slightly different problem then was described here by the original post. Perhaps a new post would be more appropriate? Have you tried using the documented method of changing your IP via System Admin?

http://wiki.freepbx.org/display/PPS/FreePBX+Distro+First+Steps+After+Installation#FreePBXDistroFirstStepsAfterInstallation-SetaStaticIPAddressandConfigureDNS