[Snort-users] Portscan 2 question

Hicks, John JHicks at ...5857...
Thu Oct 24 11:45:13 EDT 2002


it's 'last' and again, *any* service allowing ephemeral ports may cause this
not just DNS.

cheers,
John

-----Original Message-----
From: Joe Giles [mailto:jgiles at ...6534...]
Sent: Thursday, October 24, 2002 2:13 PM
To: Robby Desmond
Cc: Snort-List
Subject: Re: [Snort-users] Portscan 2 question


Well, I'm not RUNNING a DNS server, but I use one. My ISP's DNS...
Should I add that to the list? 

Also, I don't seem to have the 'lasts' command. What package is that
part of?

Thanks for the reply

Joe

On Thu, 2002-10-24 at 12:03, Robby Desmond wrote:
> At 11:22 AM 10/24/02 -0600, you wrote:
> >I have a weird problem with 2 entries in my ACID database. Apparently,
> >my server did a port scan on a remote machine. The problem is that no
> >one here initiated a port scan. The database lists my server IP as the
> >source and lists a dest IP. This is listed as a spp_portscan2. Does the
> >new snort scan other machines on the Internet? I don't want any issues
> >with other services because they think I'm port scanning their network.
> >
> >Thanks
> >
> >Joe
> 
> Are you, by chance, running DNS?
> 
> You should add your DNS servers to the list of portscan2-ignorehosts, 
> otherwise you will get this sort of activity.
> 
> If you are not running DNS, then check the "lasts" command to see who has 
> been on your system. (Or who has been appearing as someone on your
system.)
> 
> -Robby
> 
> Robert Desmond
> Systems Administrator
> UCSB Extended Learning Services
> 805-893-4906




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