[dns-operations] Odd query issue

Mohamed Lrhazi ml623 at georgetown.edu
Sun Mar 3 00:06:30 UTC 2013

Sorry posting this here..

What could possibly cause this:

One, and only one specific query so far, is failing, systematically, like
so, on a mail appliance of ours:

> dig @ mail.rwjf.org

; <<>> DiG 9.4.3-P2 <<>> @ mail.rwjf.org A
; (1 server found)
;; global options:  printcmd
;; connection timed out; no servers could be reached

Using +tcp works. same query against google public DNS works. Same query
from other systems in our network works.

tcpdump and whireshark, show, in pcap taken on the appliance itself, the
reply came back pretty quick and looks correct:

3 12:27:46.045245 DNS Standard query A
mail.rwjf.org 62431 53
4 12:27:46.054869 DNS Standard query response A 53 62431

But dig (and the mail software in the appliance) fails.

Thanks a lot,
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