Snort mailing list archives
Re: Port scan and MISC Large ICMP Packet
From: John Sage <jsage () finchhaven com>
Date: Mon, 4 Mar 2002 08:19:07 -0800
"Spp_portscan signature" -- this is not from a rule, but rather from a plugin - within snort.conf: "# portscan: detect a variety of portscans # --------------------------------------- # portscan preprocessor by Patrick Mullen <p_mullen () linuxrc net> # This preprocessor detects UDP packets or TCP SYN packets going to # four different ports in less than three seconds. "Stealth" TCP # packets are always detected, regardless of these settings. preprocessor portscan: $HOME_NET 4 3 portscan.log" Comment this out, and you should be good to go.. For the second, you might try writing a rule something like this: # pass tcp aaa.bbb.ccc.ddd/32 any <-> $HOME_NET any (msg:"TCP to/from aaa.bbb.ccc.ddd";) and start snort with the -o flag to re-order the rules, checking "pass" rules before "alert" rules... HTH.. - John -- Most people don't type their own logfiles; but, what do I care? On Mon, Mar 04, 2002 at 09:29:03AM -0500, CGI wrote:
1.I have o lot of Spp_portscan signature (snort and acid)and I would like to remove it. My sensor is working in a environment with load balacieng servers so port scanning is normal. Where is this signature because I didn't found it? 2. I have a connection between a web-server and MSsql server on port 6000. the problem is the sensor is reacting on each transaction and the signature is MISC Large ICMP Packet. How can I separate the normal traffic and tell the sensor not to react? Thanks Jo
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Current thread:
- Acid Database Logs Kenny D (Feb 28)
- Port scan and MISC Large ICMP Packet CGI (Mar 04)
- Re: Port scan and MISC Large ICMP Packet John Sage (Mar 04)
- <Possible follow-ups>
- RE: Acid Database Logs Kenny D (Feb 28)
- RE: Acid Database Logs Kenny D (Feb 28)
- Port scan and MISC Large ICMP Packet CGI (Mar 04)