Security Incidents: Re: Traffic from microsoft.com ?

From: Bjorn Djupvik <bjorn.djupvik_at_globalone.net>
Date: Sun, 1 Jul 2001 22:47:12 +0200

I can make any IP delegated to me resolve to whatever I want, including
microsoft.com. Its the way reverse dns works, so the guy scanning you
probably made the ip resolve to microsoft.com to try and spoof the scan. Try
resolving microsoft.com and see if it resolves back to the ip, if it doesnt
then its obviously a fake.

Regards,
Bjorn

----- Original Message -----
From: "Peter Bates" <Peter.Bates_at_lshtm.ac.uk>

> Was this just the sign of a big spoofed scan, but if so, how come I can't
see
> any indication of an IP address that doesn't resolve to microsoft.com?

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Received on Jul 01 2001