Snort mailing list archives
Re: My Webservers Are Showing Up In My Alerts
From: Matt Kettler <mkettler () evi-inc com>
Date: Thu, 13 Jun 2002 17:34:34 -0400
Well, that's not surprising.. A lot of the alerts you see are likely to things like codered, IIS cmd.exe and other such things, directory traversals, etc.
These usually represent actual attack attempt on your webserver. It is usually being done by a virus or an automated tool. It's not uncommon for a webserver to see dozens of these a day. The net is a brutal place, and it's not uncommon to see a network block have exploit attempts hundreds of times per day. Particularly if snort is watching unfiltered traffic in front of your firewall.
My best recommendation is that if the alerts bother you, and you KNOW that your webserver cannot possibly be vulnerable, comment out the rule in the .rules file. (for example, if all your webservers are BSD or Linux Apache webservers it's pretty safe to comment out the cmd.exe rule).
It is important to note however that they aren't false alerts, they are usually genuine attempts to penetrate your webserver to run malicious code. Snort takes the stand of having alerts for attempts, even if they were not successful, because most events that do result in a real compromise are "noisy" in that they have a lot of failed attempts preceding the one that succeeded.
At 07:18 PM 6/13/2002 +0000, Vadim Pushkin wrote:
Greetings Fellowes; My snort.conf has the following entries:var HTTP_SERVERS [192.168.11.41/32,192.168.11.42/32,192.168.11.43/32,192.168.11.44/32]# Above is all on one line var HTTP_SERVERS_PORT 8080 Several of my rules have port 80 replaced with $HTTP_SERVERS_PORT. I am getting ALOT of alerts for these as either source or dest. How can I prevent this? Thank you kindly, -vadim Vadim (Ukranian Stallion) Pushkin _________________________________________________________________ Chat with friends online, try MSN Messenger: http://messenger.msn.com _______________________________________________________________ Don't miss the 2002 Sprint PCS Application Developer's ConferenceAugust 25-28 in Las Vegas - http://devcon.sprintpcs.com/adp/index.cfm?source=osdntextlink_______________________________________________ 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
_______________________________________________________________ Don't miss the 2002 Sprint PCS Application Developer's Conference August 25-28 in Las Vegas - http://devcon.sprintpcs.com/adp/index.cfm?source=osdntextlink _______________________________________________ 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:
- My Webservers Are Showing Up In My Alerts Vadim Pushkin (Jun 13)
- Re: My Webservers Are Showing Up In My Alerts Matt Kettler (Jun 13)
- <Possible follow-ups>
- Re: My Webservers Are Showing Up In My Alerts Vadim Pushkin (Jun 13)
- Re: My Webservers Are Showing Up In My Alerts matt (Jun 13)
- Re: My Webservers Are Showing Up In My Alerts Vadim Pushkin (Jun 13)
- Re: My Webservers Are Showing Up In My Alerts matt (Jun 13)
- Re: My Webservers Are Showing Up In My Alerts Muhammad Faisal Rauf Danka (Jun 13)
- Re: My Webservers Are Showing Up In My Alerts Vadim Pushkin (Jun 14)
- Re: My Webservers Are Showing Up In My Alerts Vadim Pushkin (Jun 14)