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

[Turbo <sandeep_kr () students iiit net>]

On Mon, 30 Apr 2007, Steven wrote:

> Well a few things come to mind.
>
> 1) Are you running the scan as root?  If not it will default to the -sT
> (TCP Connect()) option.  If you are then it defaults ton -sSS (TCP SYN
> stealth).  Running it as a stealth scan would most likely be quicker.
I don't have root privileges :(
> 2) There is the -T flag which you can specify timing.  You could try
> Aggressive or Insane.  These would be the flags -T4 or -T5 respectively.
I tried them with very slight performance gain. It took 5 mins with -T5. 
In fact I have given my own timing parameters and brought it down to 4 
mins.
But there is one more doubt.. there is a huge performance gain if I remove 
the option -P0. It takes just 1.5 minutes. But it fails to detect around 
10% of the ftp servers. Any idea how to tackle this?
> Steven
> securityzone.org
>
> > I am using following command :-
> > nmap -n -P0 -p 21 -oG ftpLog.gnmap -iL IPs.txt
> > Are their other better options? or improvements to above command?
> > It takes around 7 mins to scan a list of 8960 IPs. Its ok, but I am still
> > looking for faster options.
> >
> > --
> > I do know everything, just not all at once. It's a virtual memory problem.
> > Home Page : http://students.iiit.ac.in/~sandeep_kr
> > Blog : http://sandy007smarty.blogspot.com
--
I do know everything, just not all at once. It's a virtual memory problem.
Home Page : http://students.iiit.ac.in/~sandeep_kr
Blog : http://sandy007smarty.blogspot.com