Snort mailing list archives
Re: snort and firewall all in one machine
From: Matt Kettler <mkettler () evi-inc com>
Date: Thu, 13 May 2004 12:09:26 -0400
At 09:52 AM 5/13/2004, Peggy Kam wrote:
I am currently running the firewall and snort within the same machine; and snort is having its detections before firewall blocks the packets. I would like to use snort to test if my firewall actually blocks the packets launched by attackers. Would anyone give me some advice on how I could configure IDS to do its detections after the firewall blocks the packets by its rules?
You can get some of what you want by forcing the IDS to sniff the inside interface instead of the outside. Packets from the outside that were blocked will never make it to the inside.
However, there's no way for snort to detect "post firewall".. snort uses libpcap. Libpcap is fundamentally very low-level and picks up packets at a very low level off the ethernet driver, long before the TCP/IP stack gets them.
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Current thread:
- new Barnyard new snortb Chuck Holley (May 12)
- Re: new Barnyard new snortb Michael Anderson (May 12)
- snort and firewall all in one machine Peggy Kam (May 13)
- Re: snort and firewall all in one machine Matt Kettler (May 13)
- snort and firewall all in one machine Peggy Kam (May 13)
- <Possible follow-ups>
- Re: new Barnyard new snortb Michael Anderson (May 12)
- RE: new Barnyard new snortb Chuck Holley (May 13)
- Re: new Barnyard new snortb Bamm Visscher (May 13)
- RE: new Barnyard new snortb Chuck Holley (May 14)
- RE: new Barnyard new snortb Chuck Holley (May 13)
- Re: new Barnyard new snortb Michael Anderson (May 12)
- Re: new Barnyard new snortb Michael Anderson (May 14)