Snort mailing list archives
Re: snort does not sent reset in freebsd/ipfw inline mode
From: Rajkumar S <rajkumars () gmail com>
Date: Fri, 4 Feb 2011 12:59:56 +0530
On Sat, Jan 29, 2011 at 3:08 AM, Russ Combs <rcombs () sourcefire com> wrote:
Are you sure the packets are not being blocked? The first block on a session is counted as blacklist.
Yes, with snort running as inline and DAQ listening on an IPFW divert socket, the packets are not being blocked. (I am using an HTTP and with snort running and rules being matched, browser is showing the page)
Have you tried using the dump DAQ? Blocked / blacklisted packets won't appear in the output pcap. Resets will appear in the output pcap.
I tested with dump after your email and it works fine using dump DAQ with output pcap showing reset packets. Here is the detailed test results: I have uploaded my snort.conf at http://pastebin.com/gg1hx3J4 IPFW: snort --daq ipfw --daq-var port=8100 -Q -c snort.conf Packet capture coming in to the server: http://pastebin.com/fpudZ3iq Packet capture going out from server: http://pastebin.com/0FF94G5r Packet I/O Totals: Received: 7 Analyzed: 7 (100.000%) Dropped: 0 ( 0.000%) Filtered: 0 ( 0.000%) Outstanding: 0 ( 0.000%) Injected: 12 Action Stats: Alerts: 7 (100.000%) Logged: 7 (100.000%) Passed: 0 ( 0.000%) Match Limit: 0 Queue Limit: 0 Log Limit: 0 Event Limit: 0 Verdicts: Allow: 0 ( 0.000%) Block: 0 ( 0.000%) Replace: 0 ( 0.000%) Whitelist: 0 ( 0.000%) Blacklist: 7 (100.000%) Ignore: 0 ( 0.000%) Dump: snort --daq dump --daq-var load-mode=read-file -r /root/snort-pcap/replay.pcap -Q -c snort.conf Packet capture coming in: http://pastebin.com/Vx90iRFM Packet capture going out: http://pastebin.com/0dTNmBpg Packet I/O Totals: Received: 10 Analyzed: 10 (100.000%) Dropped: 0 ( 0.000%) Filtered: 0 ( 0.000%) Outstanding: 0 ( 0.000%) Injected: 10 Action Stats: Alerts: 5 ( 50.000%) Logged: 5 ( 50.000%) Passed: 0 ( 0.000%) Match Limit: 0 Queue Limit: 0 Log Limit: 0 Event Limit: 0 Verdicts: Allow: 0 ( 0.000%) Block: 5 ( 50.000%) Replace: 0 ( 0.000%) Whitelist: 0 ( 0.000%) Blacklist: 5 ( 50.000%) Ignore: 0 ( 0.000%) One difference I can see is that there are 5 Blocked packets in dump, but IPFW does not show any dropped packets, but both commands show blacklisted packets. Do let me know if any further details are needed from my side, with regards, raj ------------------------------------------------------------------------------ The modern datacenter depends on network connectivity to access resources and provide services. The best practices for maximizing a physical server's connectivity to a physical network are well understood - see how these rules translate into the virtual world? http://p.sf.net/sfu/oracle-sfdevnlfb _______________________________________________ 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:
- snort does not sent reset in freebsd/ipfw inline mode Rajkumar S (Jan 19)
- Re: snort does not sent reset in freebsd/ipfw inline mode Rajkumar S (Jan 20)
- Re: snort does not sent reset in freebsd/ipfw inline mode Russ Combs (Jan 28)
- Re: snort does not sent reset in freebsd/ipfw inline mode Rajkumar S (Feb 03)
- Re: snort does not sent reset in freebsd/ipfw inline mode Russ Combs (Jan 28)
- Re: snort does not sent reset in freebsd/ipfw inline mode Michael Scheidell (Feb 04)
- Re: snort does not sent reset in freebsd/ipfw inline mode Russ Combs (Feb 07)
- Re: snort does not sent reset in freebsd/ipfw inline mode Rajkumar S (Jan 20)