Snort mailing list archives
Re: Snort not seeing IP-traffic, just Ether/Other
From: "Kim.Halavakoski () Crosskey fi" <Kim.Halavakoski () Crosskey fi>
Date: Thu, 18 Apr 2013 21:31:13 +0000
Hi all, tried the vlan filter earlier, didn't make any difference. Also, I had not created vlan tagged interfaces since I am receiving traffic from multiple VLANs and didn't think I needed to confgure each VLAN interface in order to get the traffic snorted... But then afer Eoins VLAN interface comments and some googling and testing setting upp VLAN tagged interfaces I realized that the 8021q module was not loaded in the kernel. I tried loading that and created some VLAN interface for one of the monitored VLANS and voilá, I am now getting traffic. I did not need to create the VLAN interfaces and have snort listen to those, just loading the 8021q module solved the issue and I am now getting the traffic with snort and tcpdump. So the solution in the end was: # modprobe 8021q Thanks guys! -Kim On 04/19/2013 12:23 AM, Tony Robinson wrote:
Try this test first: run tcpdump -i eth0 [other tcpdump options you use] vlan use the option "vlan" as your ONLY filter option, or "vlan and host x.x.x.x" where host x.x.x.x is the ip address of a vlan'd host you want to grab traffic from. Tell us if you see traffic on the interface. If this works, you can give snort a BPF filter to sniff vlan and non-vlan tagged traffic. On Thu, Apr 18, 2013 at 4:42 PM, Eoin Miller <eoin.miller () trojanedbinaries com <mailto:eoin.miller () trojanedbinaries com>> wrote: On 4/18/2013 20:36, Kim.Halavakoski () Crosskey fi wrote: > Also, any VLAN action going on? Yes, thre should be and are VLANs on the > span port(Windows 7 sees them...) but for some reason the VLAN traffic > is not seen by this box with the current configuration and OS.. Yea, you need to create your VLAN interface on the box and sniff on that in order to see the packets. Just how the OS is. http://unixfoo.blogspot.com/2007/12/linux-vlan-configuration.html -- Eoin ------------------------------------------------------------------------------ Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis & visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter _______________________________________________ Snort-users mailing list Snort-users () lists sourceforge net <mailto: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://sourceforge.net/mailarchive/forum.php?forum_name=snort-users Please visit http://blog.snort.org to stay current on all the latest Snort news! -- when does reality end? when does fantasy begin? ------------------------------------------------------------------------------ Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis & visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter _______________________________________________ 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://sourceforge.net/mailarchive/forum.php?forum_name=snort-users Please visit http://blog.snort.org to stay current on all the latest Snort news!
------------------------------------------------------------------------------ Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis & visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter _______________________________________________ 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://sourceforge.net/mailarchive/forum.php?forum_name=snort-users Please visit http://blog.snort.org to stay current on all the latest Snort news!
Current thread:
- Re: Snort Start up error, (continued)
- Re: Snort Start up error Said Nurhussein (Apr 18)
- Re: Snort Start up error waldo kitty (Apr 18)
- Re: Snort Start up error Said Nurhussein (Apr 18)
- Re: Snort Start up error waldo kitty (Apr 19)
- Re: Snort not seeing IP-traffic, just Ether/Other Glenn Geller (Apr 18)
- Re: Snort not seeing IP-traffic, just Ether/Other James Lay (Apr 18)
- Re: Snort not seeing IP-traffic, just Ether/Other Kim.Halavakoski () Crosskey fi (Apr 18)
- Re: Snort not seeing IP-traffic, just Ether/Other Eoin Miller (Apr 18)
- Re: Snort not seeing IP-traffic, just Ether/Other Tony Robinson (Apr 18)
- Re: Snort not seeing IP-traffic, just Ether/Other Kim.Halavakoski () Crosskey fi (Apr 18)
- Message not available
- Re: Snort Start up error Said Nurhussein (Apr 19)