[94276] in North American Network Operators' Group
what happens when you put a typo in a DNSBL server?
daemon@ATHENA.MIT.EDU (Wes Hardaker)
Tue Jan 16 11:38:45 2007
From: Wes Hardaker <wjhns61@hardakers.net>
To: nanog@merit.edu
Date: Tue, 16 Jan 2007 08:36:03 -0800
Errors-To: owner-nanog@merit.edu
A number of ISPs use njabl.org as a DNS BL server. However, starting
jan 2 a new domain exists "njalb.org" which is serving A records for
anything queried against it's DNS server. (note the difference: njaBL
vs njaLB). Previous to this date a misconfigured ISP was just not
being protected by the BL. Now, it's potentially dropping all mail
from anyone because of the typo.
# dig +short mail.merit.edu a
198.108.1.11
# dig +short 11.1.108.198.combined.njabl.org
# dig +short 11.1.108.198.combined.njalb.org
64.20.43.107
66.45.232.66
66.45.232.75
66.45.237.187
I know of at least one ISP that is likely dropping mail from
everyone...
--
"In the bathtub of history the truth is harder to hold than the soap,
and much more difficult to find." -- Terry Pratchett
