From: Tony Carter (tcarter@entrusion.com)
Date: Tue Nov 15 2005 - 04:45:23 EST
> -----Original Message-----
> From: Trent@yahoo.co.uk [mailto:Trent@yahoo.co.uk]
> Sent: Thursday, November 10, 2005 2:13 PM
> To: pen-test@securityfocus.com
> Subject: Nmap scanning speed
>
> I have to scan a large network. is it possible to get good
> port scanning speed of over 700 ports per second from nmap?
>
> if so what is the kind of hardware required? hsa
There are many factors that can affect nmap's speed. Turn name resolution
off while scanning (nmap -n), Tune the IP stack, use multiple server grade
nics (I like the Intel PCI-X Gig) and split the scans up per interface (nmap
-e). Also depending on your OS, I'd try to bind each nmap process to a
dedicated processor.
If your using Linux, I'd go with a 2.6x kernel as there are a lot of
improvements in SMP and the network stack.
-Tony
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