Re: portscans of the broadcast address?

[Erek Adams <erek () theadamsfamily net>]

On Fri, 11 Oct 2002, Bob Van Cleef wrote:

> I am seeing these false positives. I suspect they may be rwhod broadcasts,
> but am not how to verify this and where I would block them in the
> configuration files.
>
> [**] [117:1:1] (spp_portscan2) Portscan detected from 192.86.7.22: 6
> targets 6 ports in 50 seconds [**]
> 10/11-15:50:18.538938 192.86.7.22:513 -> 192.86.7.255:513
> UDP TTL:64 TOS:0x0 ID:17338 IpLen:20 DgmLen:88
> Len: 68

Depends on how you want to ignore them.  There are generally two ways to
'ignore' things in snort:  BPF filters and Pass rules.[0] Since this is coming
from the portscan2 preprocessor, you could also use portscan2-ignorehosts.

Cheers!

-----
Erek Adams
Nifty-Type-Guy
TheAdamsFamily.Net


[0]     http://www.theadamsfamily.net/~erek/snort/ignore.txt



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