[94277] in North American Network Operators' Group
Re: what happens when you put a typo in a DNSBL server?
daemon@ATHENA.MIT.EDU (Alexander Harrowell)
Tue Jan 16 11:51:37 2007
Date: Tue, 16 Jan 2007 16:49:30 +0000
From: "Alexander Harrowell" <a.harrowell@gmail.com>
To: "Wes Hardaker" <wjhns61@hardakers.net>
Cc: nanog@merit.edu
In-Reply-To: <sdps9fkjyk.fsf@wes.hardakers.net>
Errors-To: owner-nanog@merit.edu
Let's all hope they don't think of the possibilities *too* quickly.
On 1/16/07, Wes Hardaker <wjhns61@hardakers.net> wrote:
>
>
> 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
>
