Snort mailing list archives
Re: snort inline mode is not working with iptables
From: netchild ccie <netchildccie () hotmail com>
Date: Fri, 6 Aug 2010 19:55:39 +0000
Can't blame you, it fooled me before you =( The file attached. Regards,Wael
Date: Fri, 6 Aug 2010 15:48:05 -0400 Subject: Re: [Snort-users] snort inline mode is not working with iptables From: ryan.jordan () sourcefire com To: william.metcalf () gmail com CC: netchildccie () hotmail com; snort-users () lists sourceforge net; hat_gh () yahoo com Ah, sorry, I was thrown off by the "ICMP DROPPED" in big letters. My eyes are easily drawn. netchild, would you mind posting a copy of snort.conf.wael? -Ryan On Fri, Aug 6, 2010 at 3:07 PM, Will Metcalf <william.metcalf () gmail com> wrote:it was an alert rule.... alert icmp any any <> any any (msg: "ICMP DROPPED"; sid: 1000001;) Regards, Will On Fri, Aug 6, 2010 at 1:58 PM, Ryan Jordan <ryan.jordan () sourcefire com> wrote:Congratulations! Everything is working as expected. Pings are ICMP packets, and judging from your alert file you have successfully dropped them. -Ryan On Fri, Aug 6, 2010 at 2:41 PM, netchild ccie <netchildccie () hotmail com> wrote:Dear list, I a new user to Snort and this is my first experience with. My issue is that; it seems the snort does not communicate correctly with iptables. I have a linux machine run SNORT 2.8.6 and connected to LAN with another linux machine. I am using the other machine to ping the snort server. every time I am running snort without iptables, the ping is working and once I am using the iptables then launch snort, the ping stopped and I received alert messages!!!! I can not understand why snort drop the packets?! I'll try to summarized my issue in points 1. I've built linux machine with CentOS 4.8 2. I've downloaded snort 2.8.6 from snort website 3. I've compiled the package after I installed successfully libipq and libnet 1.0.2a. I used the following commands ./configure --enable-inline make make install 4. I've built a simple rule under /etc/snort/rules as the below and named "local.rule" alert icmp any any <> any any (msg: "ICMP DROPPED"; sid: 1000001;) 5. I loaded ip_queue model and verify it as below [root@xen1 rules]# modprobe ip_queue [root@xen1 rules]# lsmod | grep queue ip_queue 44777 0 5. I launched iptables before I started snort as below and verify iptables -A OUTPUT -p icmp -j QUEUE [root@xen1 rules]# iptables -L Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination QUEUE icmp -- anywhere anywhere 6. I've run snort as below [root@xen1 rules]# snort -k none -c /etc/snort/snort.conf.wael -l /var/log/snort/wael -Q -i eth1 Enabling inline operation Running in IDS mode --== Initializing Snort ==-- Initializing Output Plugins! Initializing Preprocessors! Initializing Plug-ins! Parsing Rules file "/etc/snort/snort.conf.wael" PortVar 'HTTP_PORTS' defined : [ 80 2301 3128 7777 7779 8000 8008 8028 8080 8180 8888 9999 ] PortVar 'SHELLCODE_PORTS' defined : [ 0:79 81:65535 ] PortVar 'ORACLE_PORTS' defined : [ 1521 ] . . . --== Initialization Complete ==-- ,,_ -*> Snort! <*- o" )~ Version 2.8.6.1 (Build 39) '''' By Martin Roesch & The Snort Team: http://www.snort.org/snort/snort-team Copyright (C) 1998-2010 Sourcefire, Inc., et al. Using PCRE version: 6.6 06-Feb-2006 Rules Engine: SF_SNORT_DETECTION_ENGINE Version 1.12 <Build 18> 7. Verify through the log Aug 6 21:38:45 xen1 snort: [1:1000001:0] ICMP DROPPED {ICMP} 10.6.211.155 -> 10.6.211.53 Aug 6 21:39:16 xen1 last message repeated 31 times Aug 6 21:40:17 xen1 last message repeated 61 times 8. verify the ping from the ping's screen [root@dana-ser-ns-02 ~]# ping 10.6.211.53 PING 10.6.211.53 (10.6.211.53) 56(84) bytes of data. <nothing> what I have missed?! Regards, Wael, ------------------------------------------------------------------------------ This SF.net email is sponsored by Make an app they can't live without Enter the BlackBerry Developer Challenge http://p.sf.net/sfu/RIM-dev2dev _______________________________________________ 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------------------------------------------------------------------------------ This SF.net email is sponsored by Make an app they can't live without Enter the BlackBerry Developer Challenge http://p.sf.net/sfu/RIM-dev2dev _______________________________________________ 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
Attachment:
snort.conf.wael.rtf
Description:
------------------------------------------------------------------------------ This SF.net email is sponsored by Make an app they can't live without Enter the BlackBerry Developer Challenge http://p.sf.net/sfu/RIM-dev2dev
_______________________________________________ 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 inline mode is not working with iptables netchild ccie (Aug 06)
- Re: snort inline mode is not working with iptables Ryan Jordan (Aug 06)
- Re: snort inline mode is not working with iptables Will Metcalf (Aug 06)
- Re: snort inline mode is not working with iptables Ryan Jordan (Aug 06)
- Re: snort inline mode is not working with iptables netchild ccie (Aug 06)
- Re: snort inline mode is not working with iptables Will Metcalf (Aug 06)
- Re: snort inline mode is not working with iptables Ryan Jordan (Aug 06)
- Re: snort inline mode is not working with iptables Will Metcalf (Aug 06)
- Re: snort inline mode is not working with iptables netchild ccie (Aug 06)
- Re: snort inline mode is not working with iptables Will Metcalf (Aug 06)
- Re: snort inline mode is not working with iptables netchild ccie (Aug 06)
- Re: snort inline mode is not working with iptables Russ Combs (Aug 06)
- Re: snort inline mode is not working with iptables Will Metcalf (Aug 06)
- Re: snort inline mode is not working with iptables Wael (Aug 07)
- Re: snort inline mode is not working with iptables Jason Brvenik (Aug 07)
- Re: snort inline mode is not working with iptables Wael (Aug 07)
- Message not available
- Message not available
- Re: snort inline mode is not working with iptables Russ Combs (Aug 07)
- Re: snort inline mode is not working with iptables netchild ccie (Aug 06)