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]
<prev [Date] next>
[Advanced]
 <prev [Thread] next>

Re: Nessus won't find open ports but Nmap will

from [George A. Theall] Network Security [Permanent Link]
Subject: Re: Nessus won't find open ports but Nmap will
Date: Mon, 20 Mar 2006 21:23:54 -0500 
On Mon, Mar 20, 2006 at 08:08:43AM +0000, andrewwhite@btinternet.com wrote:


Now if I use Nessus to scan against our Cisco concentrator it wont find
any ports open, I use a range of 1-8000.  If I use Nmap it comes back
with port 1723 as being open which is correct.  With Nmap I use:

nmap -v -sS -P0  <ip address> and get this result:

(The 1662 ports scanned but not shown below are in state: filtered)
PORT     STATE SERVICE
1723/tcp open  pptp

Why is Nessus not picking this up, I just use the Nessus port scanner.


First, how have you configured the "Ping the remote host" scanner?
There's a section under Preferences for this. You probably want to use a
TCP ping and specify either 1723 or "extended" for the destination
ports. Given that your nmap command works -- you are doing this from the
nessusd host itself, right? -- ping_host.nasl should find the target is up.

Second, if you're still having trouble, try using the scanner labelled
"SYN Scan": that's equivalent to nmap's "-sS" option.

George
_______________________________________________
Nessus mailing list
Nessus@list.nessus.org
http://mail.nessus.org/mailman/listinfo/nessus
[More messages with this same subject...]




<Prev in Thread] Current Thread [Next in Thread>
Previous by Date:  Compiling Nessus Libraries on Microsoft Windows, Peter Tracy
Next by Date:  Re: Compiling Nessus Libraries on Microsoft Windows, George A. Theall
Previous by Thread:  Nessus won't find open ports but Nmap will, andrewwhite
Next by Thread:  Re: Nessus won't find open ports but Nmap will, Michel Arboi
Indexes:  [Date] [Thread] [Top] [All Lists]