[CentOS] Problem with browser

[John Doe]

From: Tariq Ismail Dalvi <tariqdalvi at gmail.com>
> I am using CentOS 5.2 and facing a browsing problem I had complete
> system update of 71 applications recently and after the update
> completed my system can receive emails but cannot send and cannot
> browse get error domain not found, besides ftping is working fine web
> servers are working fine how can i fix this or roll back to my
> previous configuration of system.

Do you have a caching dns?
Did you check /etc/resolv.conf?

JD