trouble with hp.com mx record

Barry Margolin barry.margolin at level3.com
Thu Sep 25 14:17:12 UTC 2003


In article <bkused$2hkm$1 at sf1.isc.org>,
Anders Dyekjær Hansen  <anders at dyekjaer.dk> wrote:
>Hi list,
>
>I have two BIND 8.3.4 nameservers running on FreeBSD 4.8 -RELEASE.
>
>Both of theese name servers have trouble resolving hp.com mx record.
....
>Could this be a network problem? The two nameservers are behind a cisco pix...
>Do any of you guys have the same problem?

Are you blocking outbound TCP port 53?  The response is big enough that it
may be trying to switch to TCP instead of UDP.

Another possibility is that your server is trying to use the EDNS0
extension for large packets, and the firewall doesn't recognize this.

-- 
Barry Margolin, barry.margolin at level3.com
Level(3), Woburn, MA
*** DON'T SEND TECHNICAL QUESTIONS DIRECTLY TO ME, post them to newsgroups.
Please DON'T copy followups to me -- I'll assume it wasn't posted to the group.


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