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Network Security Nessus-Users
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ping before scan of the host

Subject: ping before scan of the host
Date: Sat, 29 Jan 2005 20:34:00 +0100 (MET)
Dear scanners,
I have to scan a range of IP's automatically (via commandline)
e.g. 10.1.2.0/16.

And I really do not know, which IP's are online.
I want to prevent my scan from taking hours or days because
of waiting for timeouts....

I read about switching off the nmap portscans inside Nessus because of
timing problems.

So I think about doing a ping before scanning
each of the boxes. 


Can this ping being done inside the Nessus scan?
If yes, what is to do?
OR
Is it better to 

first do a nmap-ping-scan > file_of_IP_alive
then  do the nmap-scan with [file_of_IP_alive] as input ?

would be nice to get a hint.
Thank you all.


-- 
NCSISU
Non Certified Security Information Systems User 

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