[96264] in North American Network Operators' Group
RE: Hotmail blackholing certain IP ranges ?
daemon@ATHENA.MIT.EDU (Leigh Porter)
Wed Apr 25 19:44:52 2007
Date: Thu, 26 Apr 2007 00:43:19 +0100
From: "Leigh Porter" <leigh.porter@ukbroadband.com>
To: "Chris Edwards" <chris@eng.gla.ac.uk>, <nanog@merit.edu>
Errors-To: owner-nanog@merit.edu
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Yeah they and a few others started doing this not too long ago (few =
months). I thought perhaps something common got upgraded/patched but =
then I just thought that it was a rather odd configuration change..
It certainly is new. A chap I know (for some reason) set his source port =
for queries to be port 53 and his DNS queries started to fail.
--
Leigh
-----Original Message-----
From: owner-nanog@merit.edu on behalf of Chris Edwards
Sent: Wed 4/25/2007 10:43 PM
To: nanog@merit.edu
Subject: Re: Hotmail blackholing certain IP ranges ?
=20
Some sites have recently reported problems mailing hotmail due to=20
inability to resolve the hotmail MX records. This appears to be due to=20
the hotmail DNS servers now blackholing DNS queries where the UDP source =
port was < 1024.
I can reproduce this here and now, but don't know if it's new.
Chris
--
Chris Edwards, Glasgow University Computing Service
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<P><FONT SIZE=3D2>Yeah they and a few others started doing this not too =
long ago (few months). I thought perhaps something common got =
upgraded/patched but then I just thought that it was a rather odd =
configuration change..<BR>
<BR>
It certainly is new. A chap I know (for some reason) set his source port =
for queries to be port 53 and his DNS queries started to fail.<BR>
<BR>
--<BR>
Leigh<BR>
<BR>
<BR>
-----Original Message-----<BR>
From: owner-nanog@merit.edu on behalf of Chris Edwards<BR>
Sent: Wed 4/25/2007 10:43 PM<BR>
To: nanog@merit.edu<BR>
Subject: Re: Hotmail blackholing certain IP ranges ?<BR>
<BR>
<BR>
Some sites have recently reported problems mailing hotmail due to<BR>
inability to resolve the hotmail MX records. This appears to be =
due to<BR>
the hotmail DNS servers now blackholing DNS queries where the UDP =
source<BR>
port was < 1024.<BR>
<BR>
I can reproduce this here and now, but don't know if it's new.<BR>
<BR>
Chris<BR>
<BR>
--<BR>
Chris Edwards, Glasgow University Computing Service<BR>
<BR>
</FONT>
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