Date: Sun, 17 Oct 2010 18:37:18 -0500 From: Brandon Gooch <jamesbrandongooch@gmail.com> To: Nerius Landys <nlandys@gmail.com> Cc: freebsd-questions@freebsd.org, Robert Bonomi <bonomi@mail.r-bonomi.com> Subject: Re: UDP packet spoofed LAN source address? Message-ID: <AANLkTikv0kDRJ9RztQD-1GUuet1mtCMdr%2BWtHqtpzn4c@mail.gmail.com> In-Reply-To: <AANLkTi=7wboDK=ZsRPwsA7ZZh-51-83cs5TCm6Yv%2BH8K@mail.gmail.com> References: <201010171718.o9HHISJq003050@mail.r-bonomi.com> <AANLkTi=7wboDK=ZsRPwsA7ZZh-51-83cs5TCm6Yv%2BH8K@mail.gmail.com>
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On Sun, Oct 17, 2010 at 4:59 PM, Nerius Landys <nlandys@gmail.com> wrote: >> >> >> > Maybe, is there a simple 10 line C program that I can run and compile to >> > check if this scenario is possible on _my_ server? >> >> 'netcat' has the capability built in. >> >> > root# echo "hi" | nc -u -w 1 -p 30002 -s 64.156.193.115 daffy 30001 > nc: bind failed: Can't assign requested address > > I don't seem to be able to spoof a source address using netcat, unless I'm > missing something in the man page. I think you need to have the IP address you wish to spoof bound to an interface. -Brandon
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