UDP packet spoofed LAN source address?

[Brandon Gooch]

On Sun, Oct 17, 2010 at 4:59 PM, Nerius Landys <nlandys at 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