Snort mailing list archives
Re: Finding rules for internal network
From: Matt Kettler <mkettler () evi-inc com>
Date: Mon, 07 Feb 2005 16:45:01 -0500
At 04:10 PM 2/7/2005, sEc nErD wrote:
I am trying to work through a snort box on debian configured by some other engineer for the rule sets. I have to find why the snort is able to detect outside scans on the network but not able to detect inside scans ,for inside scan scanner used is Super ScanCould anybody tell me where exactly to look for in the rule set snort.conf?
For rules, most rules in snort look for attacks from "EXTNERAL_NET" to "HOME_NET", and ignore attacks not coming from EXTERNAL_NET.
If you want to monitor attacks in general, HOME_NET and EXTERNAL_NET should both be set to "any".
Also, you need to be sure that the snort box will even see the traffic in question. It's pretty much impossible to monitor all traffic inside an entire lan, unless you only use hubs. With switches you can use spanning to monitor one or more ports, but it's difficult to capture everything on all ports without the switch dropping packets.
Also, be aware that the portscan preprocessors handle things differently, and you may need to modify their parameters separately.
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Current thread:
- Rule creation: content keyword mosquitooth (Feb 06)
- Re: Rule creation: content keyword Frank Knobbe (Feb 06)
- Re: Rule creation: content keyword mosquitooth (Feb 06)
- Re: Rule creation: content keyword Edin Dizdarevic (Feb 06)
- Re: Rule creation: content keyword mosquitooth (Feb 07)
- Re: Rule creation: content keyword Matt Kettler (Feb 07)
- Finding rules for internal network sEc nErD (Feb 07)
- Re: Finding rules for internal network James Riden (Feb 07)
- Re: Finding rules for internal network Matt Kettler (Feb 07)
- Finding rules for internal network sEc nErD (Feb 07)
- <Possible follow-ups>
- RE: Rule creation: content keyword Basselgia, Barry A Mr (NAF Atsugi) (Feb 06)