Snort mailing list archives
Re: Linktype 113 not decoded
From: Martin Roesch <roesch () sourcefire com>
Date: Fri, 4 Mar 2005 23:11:12 -0500
Hi Bill,Here's a quick and dirty patch that you can apply to Barnyard that'll add SLL support to its decoder. if you patch the barnyard code set with this and then try to reprocess your unified files it'll probably work. Let me know what you find. I don't have any SLL unified files to test with, so this compiles but hasn't been operationally tested...
Let me know how it goes. -Marty
Attachment:
by.patch
Description:
On Feb 28, 2005, at 9:47 AM, BALDWIN, BILL (SBCSI) wrote:
Also, if I turn on Output alert_full: alert.full It appears that Snort is able to capture the header information: [**] WEB-ATTACKS id command attempt [**] 02/28-14:31:10.793388 203.218.33.49:1337 -> X.X.X.X:80 TCP TTL:240 TOS:0x10 ID:0 IpLen:20 DgmLen:16759 ***AP*** Seq: 0x78632E02 Ack: 0x8ED8D432 Win: 0x3DBD TcpLen: 20=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+= +=+ Both Snort-2.3.0 and Barnyard-0.2.0 are running on the same system. -bill -----Original Message----- Sent: Friday, February 25, 2005 12:47 PM Subject: Re: [Snort-users] Linktype 113 not decoded Looks like you're using cooked sockets (Linux SLL) to acquire the data and Barnyard doesn't know how to process them. You'd have to add a layer 2 decoder for linux SLL traffic before Barnyard will recognize those packets. -Marty On Feb 24, 2005, at 10:12 AM, BALDWIN, BILL (SBCSI) wrote:I'm running into an issue I hope someone can help with. Environment: Snort-2.3.0 Barnyard-0.2.0 Libpcap-0.7.2-7.E3.2 RedHat ES 3 update 3 SMP (2.4.21-20.Elsmp) The system is running 2 GigE fibre cards that are spanning 2 routers with no ip address and snort starts with -i any. The problem is the alerts have no ip/udp header information. Looking at barnyards dump.log I'm getting "Linktype 113 not decoded. Raw packet dumped" instead of the packet header. If I run tcpdump or ethereal on any of the interfaces, I am able to get all header info. Any help would be greatly appreciated. Bill ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_ide95&alloc_id396&op=click _______________________________________________ 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-- Martin Roesch - Founder/CTO, Sourcefire Inc. - +1-410-290-1616 Sourcefire - Discover. Determine. Defend. roesch () sourcefire com - http://www.sourcefire.com Snort: Open Source Network IDS - http://www.snort.org
-- Martin Roesch - Founder/CTO, Sourcefire Inc. - +1-410-290-1616 Sourcefire - Discover. Determine. Defend. roesch () sourcefire com - http://www.sourcefire.com Snort: Open Source Network IDS - http://www.snort.org
Current thread:
- Linktype 113 not decoded BALDWIN, BILL (SBCSI) (Feb 25)
- <Possible follow-ups>
- Linktype 113 not decoded BALDWIN, BILL (SBCSI) (Feb 25)
- Re: Linktype 113 not decoded Martin Roesch (Feb 25)
- Re: Linktype 113 not decoded Justin Heath (Feb 26)
- Re: Linktype 113 not decoded Martin Roesch (Feb 25)
- RE: Linktype 113 not decoded BALDWIN, BILL (SBCSI) (Feb 28)
- Re: Linktype 113 not decoded Martin Roesch (Mar 03)
- RE: Linktype 113 not decoded BALDWIN, BILL (SBCSI) (Feb 28)
- Re: Linktype 113 not decoded Martin Roesch (Mar 04)
- Re: Linktype 113 not decoded Paul Schmehl (Mar 04)
- Re: Linktype 113 not decoded Martin Roesch (Mar 04)
- RE: Linktype 113 not decoded BALDWIN, BILL (SBCSI) (Mar 11)