RE: Hotmail blackholing certain IP ranges ?

["Leigh Porter" <leigh.porter () ukbroadband com>]

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 ?
 

Some sites have recently reported problems mailing hotmail due to 
inability to resolve the hotmail MX records.  This appears to be due to 
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