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Date:      Fri, 18 Aug 1995 23:07:17 -0400 (EDT)
From:      rhh@ct.picker.com (Randall Hopper)
To:        questions@freebsd.org
Subject:   Strange DNS Query when "su" is run
Message-ID:  <9508190307.AA15248@elmer.ct.picker.com>

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     I have 2.0.5 set up with SLIP across a modem link.  Whenever I "su" to
root (or any user for that matter) on my FreeBSD box, FreeBSD issues a DNS
query across my SLIP link for some reason.  If I have turned off my modem and
have neglected to kill slattach, su locks up when invoked and I can only
suspend it.  Also, kill won't get rid of this process.  

     In trying to track the problem further, I kicked off tcpdump on the SLIP
interface, and found out that DNS query is pretty strange...an A? query
for "" with a few bytes left over at the end:

22:48:49.477448 144.54.60.10.1204 > 144.54.52.2.53: 2+ A? . (17) (ttl 62, id
32018)
                         4500 002d 7d12 0000 3e11 6f35 9036 3c0a
                         9036 3402 04b4 0035 0019 6757 0002 0100
                         0001 0000 0000 0000 0000 0100 0100


Does anybody understand this behavior? 

						Thanks,

						Randall Hopper
						rhh@ct.picker.com




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