Snort mailing list archives
Re: negation of appid keyword
From: greg.mcnathansonsnuf003 () gmx-topmail de
Date: Wed, 3 Dec 2014 21:47:03 +0100
I tried several options: "appid: !http" no error message, but also not the desired outcome. Maybe that rule fires only in case of an app identifier that matches "!http" "appid: ! http" no error messages, but also not the desired outcome. This rule fires always no matter what app is involved. "!appid: http" error message Unknown rule option: '!appid'. "![appid: http]" error message Unknown rule option: '![appid'. Any ideas what I forgot? Greg Gesendet: Mittwoch, 03. Dezember 2014 um 17:41 Uhr Von: "Joel Esler (jesler)" <jesler () cisco com> An: "greg.mcnathansonsnuf003 () gmx-topmail de" <greg.mcnathansonsnuf003 () gmx-topmail de> Cc: "snort users" <snort-users () lists sourceforge net> Betreff: Re: [Snort-users] negation of appid keyword I haven’t tried this, but did you try “appid: !firefox”; -- Joel Esler Open Source Manager Threat Intelligence Team Lead Talos On Dec 3, 2014, at 8:14 AM, greg.mcnathansonsnuf003 () gmx-topmail de wrote: Hello to all snort experts, I'm wondering if one can create a rule using a negated appid specification. For example: Block non http traffic over known http ports block tcp any any -> any $HTTP_PORTS (msg:”openappid: non http activity detected over http port”; !appid: http; sid:1000000; rev:1;) or block any traffic except of a specific app: block tcp any any -> any any (msg:”openappid: non firefox traffic detected”; !appid: firefox; sid:1000000; rev:1;) Unfortunately this will result in an error message: FATAL ERROR: /etc/snort/rules/custom.rules(1) Unknown rule option: '!appid'. Any help would be appreciated. ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk _______________________________________________ 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:
- negation of appid keyword greg . mcnathansonsnuf003 (Dec 03)
- Re: negation of appid keyword Joel Esler (jesler) (Dec 03)
- Re: negation of appid keyword greg . mcnathansonsnuf003 (Dec 03)
- Re: negation of appid keyword Joel Esler (jesler) (Dec 03)