Ethical Hacking

Learn to find vulnerabilities before the bad guys do! Gain real world hands on hacking experience in our state of the art hacking lab. Course designed and taught by expert instructors with years of penetration testing experience. 12 student maximum in every class. Certification attempt included in every package.
Computer Forensics Training at InfoSec Institute

Gain the in-demand skills of a certified computer examiner, learn to recover trace data left behind by fraud, theft, and cybercrime perpetrators. Discover the source of computer crime and abuse at your organization so that it never happens again. All of our class sizes are guaranteed to be 12 students or less to facilitate one-on-one interaction with one of our expert instructors.




Network Security Snort-Users
[Top] [All Lists]
<prev [Date] next>
[Advanced]
 <prev [Thread] next>

[Snort-users] rule does not alert from nmap

from [repniksz] Network Security [Permanent Link]
Subject: [Snort-users] rule does not alert from nmap
Date: Thu, 17 Aug 2006 17:10:56 +0200 
Hi, 
I've written a very simply rule: 

alert tcp any any -> any 80 (msg: "SYN on 80 port" ; flags: S; ) 

I've started testing, first of all i used just a simply browser to get a 
page from there, and the rule was working. 
But after i've tried use Nmap in some way: 

nmap -sS -P0 -p 80 195.xxx.xxx.xxx 
nmap -P0 -p 80 195.xxx.xxx.xxx 
nmap -s-sacnflags syn -P0 -p 80 195.xxx.xxx.xxx 

All of them sent a SYN to the 80 port. 
I've checked with ethereal. 
But there was not any on the alert file. 
what's wrong? 


regards 
-------------------------------------------------------------------------
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
_______________________________________________
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
[More messages with this same subject...]




<Prev in Thread] Current Thread [Next in Thread>
Previous by Date:  [Snort-users] SnortCenter v2, Arndt, Timo
Next by Date:  Re: [Snort-users] rule does not alert from nmap, Matt Kettler
Previous by Thread:  Re: [Snort-users] HOME_NET, EXTERNAL_NET, var negatation and unwanted triggered rules, Denis Sacchet
Next by Thread:  Re: [Snort-users] rule does not alert from nmap, Matt Kettler
Indexes:  [Date] [Thread] [Top] [All Lists]