Snort mailing list archives
Re: No TCP alerts, only UDP and ICMP
From: Y M <snort () outlook com>
Date: Mon, 10 Dec 2012 22:15:28 +0300
Hey JJC, No BPF arguments, we do not use them. I ran a couple of tcpdump statements with first being generic and I can see TCP, UDP, and ICMP. The last is being too specific to TCP only from a machine/host im generating specific traffic from so l can tag and correlate the traffic im generating and seeing in the tcpdump capture. I used the same specifics with Snort in verbose mode and I can correlate with the TCP traffic im generating. Running Snort in console (-A console) generates only UDP and ICMP alerts only. I'm testing with several TCP based rules that I would normally see/able to replicate or generate. Snort statistics, some of it at least: ICMP: 0.186% UDP: 17.929% TCP: 48.667% Dropped: 0 Analyzed: 247964 (100%) Thanks. Yaser ________________________________ From: JJC<mailto:cummingsj () gmail com> Sent: 12/10/2012 9:12 PM To: Castle, Shane<mailto:scastle () bouldercounty org> Cc: Y M<mailto:snort () outlook com>; Lay, James<mailto:james.lay () wincofoods com>; snort-users () lists sourceforge net<mailto:snort-users () lists sourceforge net> Subject: Re: [Snort-users] No TCP alerts, only UDP and ICMP or any BPF added to the end as a runtime arg? How about just running a tcpdump with a snaplen of 0 and write to a pcap to see... On Mon, Dec 10, 2012 at 10:58 AM, Castle, Shane <scastle () bouldercounty org> wrote:
Was wondering - you wouldn't by chance be running with a filter via the "-F" runtime switch (or "config bpf_file" in snort.conf), would you? -- Shane Castle Data Security Mgr, Boulder County IT -----Original Message----- From: Y M [mailto:snort () outlook com] Sent: Monday, December 10, 2012 10:29 To: Lay, James; snort-users () lists sourceforge net Subject: Re: [Snort-users] No TCP alerts, only UDP and ICMP Hi Lay, Sorry for my late reply. I wouldn't be able to provide a pcap file, at least for now. However, I tried that in Snort, using the -K pcap (I also tried the -b switch) and read that through tcpdump, and I only got UDP packets, with some ICMPs. Running Snort in verbose mode shows that the majority of the traffic is in fact TCP. Thanks. YM ________________________________ From: Lay, James <mailto:james.lay () wincofoods com> Sent: 12/10/2012 7:14 PM To: snort-users () lists sourceforge net Subject: Re: [Snort-users] No TCP alerts, only UDP and ICMP Got a small pcap you could share? James From: Y M [mailto:snort () outlook com] Sent: Monday, December 10, 2012 9:01 AM To: Justin Knox Cc: snort-users () lists sourceforge net Subject: Re: [Snort-users] No TCP alerts, only UDP and ICMP Hi Justin, Yes I did. I also tried/compared with previously working conf files, conf file in the tarball, and the conf file from Snort labs but the behavior remained the same across all configurations. Thanks. YM ________________________________ From: Justin Knox <mailto:jknox () indexzero org> Sent: 12/10/2012 6:49 PM To: Y M <mailto:snort () outlook com> Cc: Marcos Rodriguez <mailto:marcos.e.rodriguez () gmail com> ; snort-users () lists sourceforge net Subject: Re: [Snort-users] No TCP alerts, only UDP and ICMP Hi YM, have you verified that frag3 and stream5 are configured and enabled to support tcp? -Justin On Mon, Dec 10, 2012 at 10:23 AM, Y M <snort () outlook com> wrote: Hi Marcos, Thanks for your reply. I did try with -k none as suggested and I'm getting the same results, no TCP alerts, just UDP and ICMP. ________________________________ From: Marcos Rodriguez <mailto:marcos.e.rodriguez () gmail com> Sent: 12/10/2012 5:50 PM To: Y M <mailto:snort () outlook com> Cc: snort-users () lists sourceforge net Subject: Re: [Snort-users] No TCP alerts, only UDP and ICMP Hi YM, Could you try again by adding '-k none' please? ------------------------------------------------------------------------------ LogMeIn Rescue: Anywhere, Anytime Remote support for IT. Free Trial Remotely access PCs and mobile devices and provide instant support Improve your efficiency, and focus on delivering more value-add services Discover what IT Professionals Know. Rescue delivers http://p.sf.net/sfu/logmein_12329d2d _______________________________________________ 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! ------------------------------------------------------------------------------ LogMeIn Rescue: Anywhere, Anytime Remote support for IT. Free Trial Remotely access PCs and mobile devices and provide instant support Improve your efficiency, and focus on delivering more value-add services Discover what IT Professionals Know. Rescue delivers http://p.sf.net/sfu/logmein_12329d2d _______________________________________________ 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!
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Current thread:
- No TCP alerts, only UDP and ICMP Y M (Dec 10)
- Re: No TCP alerts, only UDP and ICMP Marcos Rodriguez (Dec 10)
- <Possible follow-ups>
- Re: No TCP alerts, only UDP and ICMP Y M (Dec 10)
- Re: No TCP alerts, only UDP and ICMP Justin Knox (Dec 10)
- Re: No TCP alerts, only UDP and ICMP Y M (Dec 10)
- Re: No TCP alerts, only UDP and ICMP Lay, James (Dec 10)
- Re: No TCP alerts, only UDP and ICMP Y M (Dec 10)
- Re: No TCP alerts, only UDP and ICMP Castle, Shane (Dec 10)
- Re: No TCP alerts, only UDP and ICMP JJC (Dec 10)
- Re: No TCP alerts, only UDP and ICMP Castle, Shane (Dec 10)
- Re: No TCP alerts, only UDP and ICMP Y M (Dec 10)
- Re: No TCP alerts, only UDP and ICMP Y M (Dec 10)
- unsubscribe Thomison, Lee (Dec 10)
- Re: unsubscribe Joel Esler (Dec 10)
- Re: No TCP alerts, only UDP and ICMP Peter Bates (Dec 11)
- Re: No TCP alerts, only UDP and ICMP Russ Combs (Dec 11)
- Re: No TCP alerts, only UDP and ICMP Y M (Dec 11)
- unsubscribe Thomison, Lee (Dec 10)