Snort mailing list archives
Re: stream4 question
From: Erek Adams <erek () snort org>
Date: Thu, 7 Aug 2003 13:42:14 -0400 (EDT)
On Thu, 7 Aug 2003, Merrill, Bill (CHS) wrote:
I have racked my brain, and cannot think of a way to filter the following out. I am not a programmer, and editing the header file scared me a bit. Besides fixing the problem with the terminal itself, an old Unisys LT300, can I actually filter the following with a rule somehow?
Yep. [...snip...]
[**] [111:1:1] (spp_stream4) STEALTH ACTIVITY (unknown) detection [**] 08/07-08:48:46.256474 x.x.x.x:2667 -> x.x.x.x:23 TCP TTL:254 TOS:0x0 ID:24 IpLen:20 DgmLen:44 ****P*S* Seq: 0x63 Ack: 0x0 Win: 0x572 TcpLen: 24 TCP Options (1) => MSS: 1394
[...snip...] There are two basic ways to ignore traffic. Pass rules and BPF filters. Since this is from the stream4 preprocessor, a pass rule won't help you. You'll need to use a BPF filter. At the most basic level, it tells Snort what traffic to or not to look at. snort <your options here> "not (src 10.10.10.10 and dst 10.10.10.11 and port 23) For a more detailed breakdown, check out the tpcdump manpage [0]. Cheers! ----- Erek Adams "When things get weird, the weird turn pro." H.S. Thompson [0] http://www.tcpdump.org/tcpdump_man.html ------------------------------------------------------- This SF.Net email sponsored by: Free pre-built ASP.NET sites including Data Reports, E-commerce, Portals, and Forums are available now. Download today and enter to win an XBOX or Visual Studio .NET. http://aspnet.click-url.com/go/psa00100003ave/direct;at.aspnet_072303_01/01 _______________________________________________ Snort-users mailing list Snort-users () lists sourceforge net Go to this URL to change user options or unsubscribe: https://lists.sourceforge.net/lists/listinfo/snort-users Snort-users list archive: http://www.geocrawler.com/redir-sf.php3?list=snort-users
Current thread:
- stream4 question Merrill, Bill (CHS) (Aug 07)
- Re: stream4 question Erek Adams (Aug 07)