Security Basics mailing list archives
Re: how to find out a list of available ftp servers on LAN
From: Lukasz Szmit <lukasz.szmit () ucd ie>
Date: Tue, 01 May 2007 17:05:24 +0100
On Sun, 2007-04-29 at 05:28 +0530, Turbo wrote:
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'd use: nmap -n -P0 -sT -p 21 --max-retries 0 --open -oG ftpLog.gnmap -iL IPs.txt If you're trying to discover accessible FTP' on you LAN, Connect scan (-sT) is fine, otherwise use SYN (-sS) which *may* bypass some firewalls and give better results. Setting max-retries to 0 will result in nmap sending just a single probe - this gives a significant improvement in scan time on my box for a /24 compared to defaults (1.172 seconds vs. 14.754 seconds). You may miss some slow-to-respond boxes. The --open option will spare you some noise in the output as closed/filtered ports won't be reported. regards, -- Lukasz Szmit UCD, Dublin
Current thread:
- RE: how to find out a list of available ftp servers on LAN Troy Robinson (May 01)
- Re: how to find out a list of available ftp servers on LAN John Mason Jr (May 01)
- RE: how to find out a list of available ftp servers on LAN Turbo (May 03)
- Re: how to find out a list of available ftp servers on LAN Pranay Kanwar (May 04)
- Re: how to find out a list of available ftp servers on LAN Turbo (May 04)
- Re: how to find out a list of available ftp servers on LAN Pranay Kanwar (May 04)
- Re: how to find out a list of available ftp servers on LAN Turbo (May 07)
- Re: how to find out a list of available ftp servers on LAN Pranay Kanwar (May 07)
- Re: how to find out a list of available ftp servers on LAN Turbo (May 07)
- Re: how to find out a list of available ftp servers on LAN Pranay Kanwar (May 07)
- Re: how to find out a list of available ftp servers on LAN Pranay Kanwar (May 04)
- <Possible follow-ups>
- Re: how to find out a list of available ftp servers on LAN Lukasz Szmit (May 01)
- Re: how to find out a list of available ftp servers on LAN Turbo (May 01)
- Re: how to find out a list of available ftp servers on LAN Turbo (May 01)
- Re: how to find out a list of available ftp servers on LAN Justin Ross (May 01)
- Re: how to find out a list of available ftp servers on LAN Jason Ross (May 02)
- Re: how to find out a list of available ftp servers on LAN killy (May 03)