Snort mailing list archives

Re: Hogger 0.1.3 released


From: Joel Esler <joel.esler () me com>
Date: Tue, 23 Mar 2010 14:18:55 -0400

Max number of hosts in the attribute table is 512k. Default for Snort is 10000.

--
Joel Esler
Sent from my iPhone

On Mar 23, 2010, at 2:16 PM, "Jefferson, Shawn" <Shawn.Jefferson () bcferries com > wrote:

Thanks, that makes sense. How about the size of the attribute table? If I scan every host in my environment the file may get quite large. What are the memory requirements of the host attribute table?



From: Crook, Parker [mailto:Parker_Crook () reyrey com]
Sent: Tuesday, March 23, 2010 10:12 AM
To: Jefferson, Shawn; Joel Esler; Andy Berryman
Cc: snort-users () lists sourceforge net
Subject: RE: [Snort-users] Hogger 0.1.3 released



No downside really… for hosts that are not specified in the xml, the y revert to the default policy for each respective preprocessor, e.g.:

preprocessor frag3_engine: policy windows detect_anomalies overlap_limit 10



I may have an environment that is mostly made up of windows boxes, but I have scanned everything else and those hosts are represented in the xml, so I changed my base policy to treat all other hosts as windows boxes (of course you can substitute this for what is good for your environment.



As far as the rules side goes… since your xml can detail services on nonstandard ports, say you have a box that is running http on port 2000, and you have a rule with a header of:

alert tcp $EXTERNAL_NET any -> $HTTP_SERVERS 80

but that rule contains “metadata:service http;”

Snort will also inspect port 2000 traffic for that host as well since it is defined as http traffic.

Again, if an IP is not detailed in the attribute table, Snort will process the rule as it normally would, ie, on port 80 traffic for the host.



I hope I wasn’t too terse and that makes sense, but I have to run to a meeting and had to cut it short.

-Parker

From: Jefferson, Shawn [mailto:Shawn.Jefferson () bcferries com]
Sent: Tuesday, March 23, 2010 1:02 PM
To: Joel Esler; Andy Berryman
Cc: Crook, Parker; snort-users () lists sourceforge net
Subject: RE: [Snort-users] Hogger 0.1.3 released



Is there any downside to using it? If the IP address is not in the host attribute table will it still be monitored as per normal?



From: Joel Esler [mailto:joel.esler () me com]
Sent: Tuesday, March 23, 2010 9:45 AM
To: Andy Berryman
Cc: Crook, Parker; snort-users () lists sourceforge net
Subject: Re: [Snort-users] Hogger 0.1.3 released



Glad to see people are using this. It makes the set up of the network as far as Snort sees it (preprocessors, rules, etc) much much easier, and protects against much more.



Joel



On Mar 23, 2010, at 11:51 AM, Andy Berryman wrote:



So, I have hogger running and it slurpped in my XML file and I see it in the syslog that it loaded it. Thanks for the help!



--
Joel Esler
http://blog.joelesler.net


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