Re: Problem to sniff 80, 110, 25 and 21 ports.

[Matt Kettler <mkettler () evi-inc com>]

At 01:23 PM 10/29/2003, you wrote:
> I use this command:
>
> root@andrealnx:~# snort -i eth0 -l prova dst port 80 and dst port 110 and 
> dst port 25 and dst port 21
>
> and I've got this error:

Is there a reason why are you using snort for this? If you just need a 
packet dumper, use tcpdump.

Also, the above rule theoretically would never match any packets at all.. 
you want or, not and.. It's impossible for a packet to be destined to port 
80 and port 110, it can only be destined to one or the other.




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