Re: portscan2-ignore... ???

[Erek Adams <erek () snort org>]

On Sun, 17 Aug 2003, Michael D Schleif wrote:

[...snip...]

> >     snort <options> 'not src host 192.168.123.150'

[...snip...]

> That is *not* what I want to do ;>

Actually it is.  :)

> As I explained in the original post:
>
>    ``What if I want to ignore spp_portscan2 *only* originating from
>    192.168.123.150?  Suppose that I am very interested in any scans where
>    192.168.123.150 is the destination/subject of that scan?''

Look at the top line.  It says "not src" which mean show all traffic
except that which has a SOURCE IP ip of 192.168.123.150.

> Now, I have un-configured portscan[1], and have retested:
>
> [1] From 192.168.123.110: nmap -O 192.168.123.150 -- which spews into
> /var/log/snort/portscan2.log, and gives me spp_portscan2 in
> /var/log/snort/alert .
>
> [2] From 192.168.123.150: nmap -O 192.168.123.110 -- which puts
> _nothing_ in /var/log/snort/portscan2.log, and _no_ spp_portscan2 in
> /var/log/snort/alert .

Yes.  Both normal, and working the way you want.

> [3] From 192.168.123.150: nmap -O localhost -- which puts _nothing_ in
> /var/log/snort/portscan2.log, and _no_ spp_portscan2 in
> /var/log/snort/alert .

Normal.  Localhost is 127.0.0.1 not 192.168.123.150.

> So, I guess my confusion was whether or not *ALL* scans of
> 192.168.123.150, originating somewhere other than 192.168.123.150, would
> result in spp_portscan2 alerts?  Apparently, as I desire, that is the
> case.
>
> Have I missed anything?  If not, case closed and thank you for
> clarification . . .

I think that should get you going.

Cheers!

-----
Erek Adams

   "When things get weird, the weird turn pro."   H.S. Thompson


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