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You waited less than an hour before proclaiming the list defunct?
It's Sunday in most of the world. Most of us are doing other things
than sitting on this list.<br>
<br>
That said, my initial thought is that your server answered your
question. Nothing more. Did you ask it for the A record for
googlemail.l.google.com ? That might have told you more.<br>
<br>
Lyle Giese<br>
LCR Computer Services, Inc.<br>
<br>
<div class="moz-cite-prefix">On 07/06/14 13:38, Mohamed Lrhazi
wrote:<br>
</div>
<blockquote
cite="mid:CAEU_gmei_WY+gbLkaVCnMPNyCBBtJPoq3mEKB3pTrZqYzaCvhQ@mail.gmail.com"
type="cite">
<div dir="ltr">I am thinking this list is not appropriate for some
of my questions... Could someone suggest a better one, maybe as
active and rich, as this one, but more appropriate for general
DNS discussions?
<div><br>
</div>
<div>Thanks a lot,</div>
<div>Mohamed.</div>
</div>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">On Sun, Jul 6, 2014 at 2:02 PM, Mohamed
Lrhazi <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:ml623@georgetown.edu" target="_blank">ml623@georgetown.edu</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">We had a little mail outage which turned out
to be caused by one of our caching DNS servers returning
the bellow incomplete reply.
<div>
<br>
</div>
<div>Clearing the cache on the problematic server fixed
the issue.... </div>
<div><br>
</div>
<div>Am thinking it is now impossible for me to find the
root cause in this instance... but wondering if you guys
could hint at what could cause such a problem... bugs in
the DNS servers involved? temporary misconfig at
Google's servers? network issue?</div>
<div><br>
</div>
<div>The setup is a bit convoluted:</div>
<div><br>
</div>
<div>cache server --> resolver cache server -->
Internet</div>
<div><br>
</div>
<div>The fix was clearing at the first server. so I am
guessing at some point the resolver gave the incomplete
answer.</div>
<div><br>
</div>
<div>Thanks a lot,</div>
<div>Mohamed.</div>
<div><br>
</div>
<div>
<div>➜ ~ dig <a moz-do-not-send="true"
href="http://mail.google.com" target="_blank">mail.google.com</a>
@<a moz-do-not-send="true"
href="http://141.161.100.201" target="_blank">141.161.100.201</a></div>
<div><br>
</div>
<div>
; <<>> DiG 9.9.5-3-Ubuntu <<>>
<a moz-do-not-send="true"
href="http://mail.google.com" target="_blank">mail.google.com</a>
@<a moz-do-not-send="true"
href="http://141.161.100.201" target="_blank">141.161.100.201</a></div>
<div>;; global options: +cmd</div>
<div>;; Got answer:</div>
<div>;; ->>HEADER<<- opcode: QUERY, status:
NOERROR, id: 20414</div>
<div>;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY:
4, ADDITIONAL: 5</div>
<div><br>
</div>
<div>;; OPT PSEUDOSECTION:</div>
<div>; EDNS: version: 0, flags:; udp: 4096</div>
<div>;; QUESTION SECTION:</div>
<div>;<a moz-do-not-send="true"
href="http://mail.google.com" target="_blank">mail.google.com</a>.<span
style="white-space:pre-wrap"> </span>IN<span
style="white-space:pre-wrap"> </span>A</div>
<div><br>
</div>
<div>
;; ANSWER SECTION:</div>
<div><a moz-do-not-send="true"
href="http://mail.google.com" target="_blank">mail.google.com</a>.<span
style="white-space:pre-wrap"> </span>10213<span
style="white-space:pre-wrap"> </span>IN<span
style="white-space:pre-wrap"> </span>CNAME<span
style="white-space:pre-wrap"> </span><a
moz-do-not-send="true"
href="http://googlemail.l.google.com"
target="_blank">googlemail.l.google.com</a>.</div>
<div><br>
</div>
<div>;; AUTHORITY SECTION:</div>
<div><a moz-do-not-send="true" href="http://google.com"
target="_blank">google.com</a>.<span
style="white-space:pre-wrap"> </span>96485<span
style="white-space:pre-wrap"> </span>IN<span
style="white-space:pre-wrap"> </span>NS<span
style="white-space:pre-wrap"> </span><a
moz-do-not-send="true" href="http://ns2.google.com"
target="_blank">ns2.google.com</a>.</div>
<div><a moz-do-not-send="true" href="http://google.com"
target="_blank">google.com</a>.<span
style="white-space:pre-wrap"> </span>96485<span
style="white-space:pre-wrap"> </span>IN<span
style="white-space:pre-wrap"> </span>NS<span
style="white-space:pre-wrap"> </span><a
moz-do-not-send="true" href="http://ns3.google.com"
target="_blank">ns3.google.com</a>.</div>
<div><a moz-do-not-send="true" href="http://google.com"
target="_blank">google.com</a>.<span
style="white-space:pre-wrap"> </span>96485<span
style="white-space:pre-wrap"> </span>IN<span
style="white-space:pre-wrap"> </span>NS<span
style="white-space:pre-wrap"> </span><a
moz-do-not-send="true" href="http://ns4.google.com"
target="_blank">ns4.google.com</a>.</div>
<div><a moz-do-not-send="true" href="http://google.com"
target="_blank">google.com</a>.<span
style="white-space:pre-wrap"> </span>96485<span
style="white-space:pre-wrap"> </span>IN<span
style="white-space:pre-wrap"> </span>NS<span
style="white-space:pre-wrap"> </span><a
moz-do-not-send="true" href="http://ns1.google.com"
target="_blank">ns1.google.com</a>.</div>
<div><br>
</div>
<div>;; ADDITIONAL SECTION:</div>
<div><a moz-do-not-send="true"
href="http://ns3.google.com" target="_blank">ns3.google.com</a>.<span
style="white-space:pre-wrap"> </span>108462<span
style="white-space:pre-wrap"> </span>IN<span
style="white-space:pre-wrap"> </span>A<span
style="white-space:pre-wrap"> </span><a
moz-do-not-send="true" href="tel:216.239.36.10"
value="+12162393610" target="_blank">216.239.36.10</a></div>
<div><a moz-do-not-send="true"
href="http://ns4.google.com" target="_blank">ns4.google.com</a>.<span
style="white-space:pre-wrap"> </span>108462<span
style="white-space:pre-wrap"> </span>IN<span
style="white-space:pre-wrap"> </span>A<span
style="white-space:pre-wrap"> </span><a
moz-do-not-send="true" href="tel:216.239.38.10"
value="+12162393810" target="_blank">216.239.38.10</a></div>
<div><a moz-do-not-send="true"
href="http://ns1.google.com" target="_blank">ns1.google.com</a>.<span
style="white-space:pre-wrap"> </span>108462<span
style="white-space:pre-wrap"> </span>IN<span
style="white-space:pre-wrap"> </span>A<span
style="white-space:pre-wrap"> </span><a
moz-do-not-send="true" href="tel:216.239.32.10"
value="+12162393210" target="_blank">216.239.32.10</a></div>
<div><a moz-do-not-send="true"
href="http://ns2.google.com" target="_blank">ns2.google.com</a>.<span
style="white-space:pre-wrap"> </span>108462<span
style="white-space:pre-wrap"> </span>IN<span
style="white-space:pre-wrap"> </span>A<span
style="white-space:pre-wrap"> </span><a
moz-do-not-send="true" href="tel:216.239.34.10"
value="+12162393410" target="_blank">216.239.34.10</a></div>
<div><br>
</div>
<div>;; Query time: 22 msec</div>
<div>;; SERVER: 141.161.100.201#53(141.161.100.201)</div>
<div>;; WHEN: Sun Jul 06 12:42:09 EDT 2014</div>
<div>;; MSG SIZE rcvd: 207</div>
</div>
<div><br>
</div>
<div><br>
</div>
</div>
</blockquote>
</div>
<br>
</div>
<br>
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