[162023] in North American Network Operators' Group
Re: BCP38 tester?
daemon@ATHENA.MIT.EDU (Valdis.Kletnieks@vt.edu)
Mon Apr 1 10:10:33 2013
To: ahebert@pubnix.net
In-Reply-To: Your message of "Mon, 01 Apr 2013 09:34:31 -0400."
<51598CE7.2050008@pubnix.net>
From: Valdis.Kletnieks@vt.edu
Date: Mon, 01 Apr 2013 10:09:20 -0400
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
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On Mon, 01 Apr 2013 09:34:31 -0400, Alain Hebert said:
> I'm sad to confirm that my spoof test was successful with a:
>
> . SageMCom modem+router, which is used by a big TelCo around my
> part, for both their residential and commercial ADSL2+, VDSL customers.
You might want to check more carefully exactly what the failure mode
was. I'm willing to bet that the router has been configured to assign
addresses inside a specific RFC 1918 /24, and will do Something Terrible
to spoofed packets in that range, but will figure you know what you're
doing and pass them if you source a packet from outside that /24.
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