Security Basics: Re: how to find out a list of available ftp servers on LAN

[Turbo <sandeep_kr () students iiit net>]

Thanks for the help. But I have already tried out all those parameters. I 
used --min-rtt-timeout of 15 (extremely low) and --min-parallelism of 256 
but still couldn't achieve a performance as high as that achieved by that 
simple c program.
Still looking for improvements... Once again, thanks for the suggestion.

On Sat, 5 May 2007, Pranay Kanwar 
wrote:
> Hi,
>
> You can fine tune nmap's performance using the --max-parallelism,
> --min-parallelism, --min-rtt-timeout, --host-timeout and
> other few options i'll illustrate the --max-parallelism option
>
> 1. $ time nmap -sT --max-parallelism 1 172.31.1.15
>
>
> Starting Nmap 4.20 ( http://insecure.org ) at 2007-05-05 01:29 IST
> Interesting ports on iws15.iiita.ac.in (172.31.1.15):
> Not shown: 1687 closed ports
> PORT     STATE SERVICE
> 21/tcp   open  ftp
> 22/tcp   open  ssh
> 111/tcp  open  rpcbind
> Nmap finished: 1 IP address (1 host up) scanned in 0.800 seconds
>
> real    0m0.804s
> user    0m0.023s
> sys     0m0.157s
>
> 2. $time  nmap -sT --max-parallelism 5 172.31.1.15
> Starting Nmap 4.20 ( http://insecure.org ) at 2007-05-05 01:31 IST
> Interesting ports on iws15.iiita.ac.in (172.31.1.15):
> Not shown: 1687 closed ports
> PORT     STATE SERVICE
> 21/tcp   open  ftp
> 22/tcp   open  ssh
> 111/tcp  open  rpcbind
>
> Nmap finished: 1 IP address (1 host up) scanned in 0.290 seconds
>
> real    0m0.294s
> user    0m0.016s
> sys     0m0.132s
>
> As you can see the amount of time taken for execution is clearly obvious.
>
> Regards,
>
> warl0ck // MSG
> http://www.metaeye.org
--
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