Snort mailing list archives
Re: Snort tcp reset
From: Daniele Gallarato <daniele.gallarato () gmail com>
Date: Tue, 8 May 2012 14:44:11 +0200
I've other information. My snort is passive, it sniff from eth1 (a monitor interface on a cisco switch), and is monitored with eth0 interface. So, we need that tcp reset come to eth0 interface, but if I sniff traffic with tcpdump, I can see that tcp reset is send through eth1, and eth1 can't send traffic (due to monitor interface limitation). With flexresp2 we can choose which interface use for reset flexresp2 interface: eth0 but this configuration option is disappeared with flexresp3. Anyone know how to address this problem? Thank Daniele 2012/5/8 Daniele Gallarato <daniele.gallarato () gmail com>
Sorry. Anyone can address me to a documentation about tcp reset with flexresp3? Thanks Daniele 2012/5/4 Daniele Gallarato <daniele.gallarato () gmail com>Yes. I don't understand well the difference between flexresp3 (previously I've used flexresp1, so I've tried to use flexresp3), and active-response. If I configure config response: device eth0 attempts 2 when snort hit a reset rule, it flood the network and I can't reach it anymore... Thanks * Flexresp3 is new: the resp rule option keyword is used to configure active responses for rules that fire. ./configure --enable-flexresp3 alert tcp any any -> any 80 (content:"a"; resp:<resp_t>; sid:1;) * resp_t includes all flexresp and flexresp2 options: <resp_t> ::= \ rst_snd | rst_rcv | rst_all | \ reset_source | reset_dest | reset_both | icmp_net | \ icmp_host | icmp_port | icmp_all See README.flexresp3 for more. 2012/5/4 Russ Combs <rcombs () sourcefire com>Did you check README.active? On Fri, May 4, 2012 at 10:00 AM, Daniele Gallarato < daniele.gallarato () gmail com> wrote:Hello. I've installed snort version 2.9.2.2 onto an ubuntu server (2.6.32-41-server #88-Ubuntu SMP). I've followed this good guide: http://www.google.it/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&ved=0CHsQFjAB&url=http%3A%2F%2Fwww.snort.org%2Fassets%2F158%2F014-snortinstallguide292.pdf&ei=zd-jT5vCBPTa4QSl0rifCQ&usg=AFQjCNGaL8nB1vZPRodUBX6IQluwufpbFQ&sig2=FqFj5w3hOXP1NBcn3gbxoQ All seems to work properly. Only thing that doesn't work is flexresp3. In an old installation (2.4.3) with old flexresp, resets work. In this new installation, I've compiled snort with: ./configure --prefix=/usr/local/snort --enable-sourcefire --enable-active-response --enable-flexresp3 make make install and written some local.rules (they work) and some reset.rules (they hit the rule, appear in reports, but doesn't reset). Rule is: alert tcp <my_ip> any -> $HOME_NET 3389 (resp: rst_all; msg:"Reset Sessioni Remote Desktop" ; sid:200004;) I've also checked packets with wireshark, I can't see any reset. Any help will be appreciated. Thanks Daniele Gallarato ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ 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 Please visit http://blog.snort.org to stay current on all the latest Snort news!
------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
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Current thread:
- Snort tcp reset Daniele Gallarato (May 04)
- Re: Snort tcp reset Russ Combs (May 04)
- Re: Snort tcp reset Daniele Gallarato (May 04)
- Re: Snort tcp reset Daniele Gallarato (May 08)
- Re: Snort tcp reset Daniele Gallarato (May 08)
- Re: Snort tcp reset Russ Combs (May 08)
- Re: Snort tcp reset Daniele Gallarato (May 09)
- Re: Snort tcp reset Russ Combs (May 09)
- Re: Snort tcp reset Daniele Gallarato (May 04)
- Re: Snort tcp reset Russ Combs (May 04)