Documentation issue (-F)

[Daniel Miller <bonsaiviking () gmail com>]

List,

From the man page:
> -F (Fast (limited port) scan) .
>        Specifies that you wish to scan fewer ports than the default. 
> Normally Nmap scans the most common 1,000 ports for each scanned 
> protocol. With -F, this is reduced to 100.
>
>        Nmap needs an nmap-services file with frequency information in 
> order to know which ports are the most common. If port frequency 
> information isn't available, perhaps because of the use of a custom 
> nmap-services file, -F means to scan only ports that are named in the 
> services file (normally Nmap scans all named ports plus ports 1–1024).
Empirically, I see Nmap scans 1000 ports by default, 100 with -F, and 
<300 when nmap-services is not available. What is that last 
parenthetical statement about? Is this old info which should be purged?

Dan

_______________________________________________
Sent through the nmap-dev mailing list
http://cgi.insecure.org/mailman/listinfo/nmap-dev
Archived at http://seclists.org/nmap-dev/