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 Nessus-Users
[Top] [All Lists]

Re: Looking for specific information on 'how' nessus discovers ports

Subject: Re: Looking for specific information on 'how' nessus discovers ports
Date: Thu, 13 Sep 2007 13:39:27 -0400
Eric Whitehill wrote:
Basically I'm trying to figure out how Nessus determines a host is 'alive' 
and then if it is alive, how does it determine if a port is open or not. 

It's not for me, it's for a vendor that is being rather 'difficult'.  


You might look in Chris McNab's book "Network Security Assessment" (O'Reilly). 
Chapter 4, "IP Network Scanning", probably has what you want to know.

BobS

Oh, I have absolutely no connection with O'Reilly.  I just own a copy.
_______________________________________________
Nessus mailing list
Nessus@list.nessus.org
http://mail.nessus.org/mailman/listinfo/nessus

<Prev in Thread] Current Thread [Next in Thread>