DNS server could not resolve, no response from root servers

Brad Knowles brad at stop.mail-abuse.org
Mon Jun 6 20:45:14 UTC 2005

At 7:23 PM -0500 2005-06-04, Yihua Philip Sheng wrote:

>  Runing the "snoop" command found that the root servers are not responding to
>  my DNS server. I only saw my servers sending requests out to the root
>  servers, but seldom saw root servers respond. My network guy told me  that
>  the port 53 is open on his firewall.

	Did he open port 53 for TCP and UDP both, or just TCP?  Have you 
checked your configuration to make sure that you're using port 53 as 
the source port for all outgoing queries?

Brad Knowles, <brad at stop.mail-abuse.org>

"Those who would give up essential Liberty, to purchase a little
temporary Safety, deserve neither Liberty nor Safety."

     -- Benjamin Franklin (1706-1790), reply of the Pennsylvania
     Assembly to the Governor, November 11, 1755

   SAGE member since 1995.  See <http://www.sage.org/> for more info.

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