Re: newbie question ....

[Erek Adams <erek () theadamsfamily net>]

On Tue, 10 Sep 2002, Ryan Hairyes wrote:

> Im new to snort .... and I was wondering if someone maybe able to point me
> in the right direction.  My question is .... how do you determine the
> DSIZE when using the dsize option.  I noticed with the virus.rules file the
> klez alert that the dsize is set to >120.  Thanks for the help.

Sure.

http://www.snort.org/docs/writing_rules/chap2.html#tth_sEc2.3.8

"The dsize option is used to test the packet payload size. It may be set to
any value, plus use the greater than/less than signs to indicate ranges and
limits. For example, if you know that a certain service has a buffer of a
certain size, you can set this option to watch for attempted buffer overflows.
It has the added advantage of being a much faster way to test for a buffer
overflow than a payload content check."

Does that help?

-----
Erek Adams
Nifty-Type-Guy
TheAdamsFamily.Net



-------------------------------------------------------
This sf.net email is sponsored by: OSDN - Tired of that same old
cell phone?  Get a new here for FREE!
https://www.inphonic.com/r.asp?r=sourceforge1&refcode1=vs3390
_______________________________________________
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