Security Basics mailing list archives
Re: how to find out a list of available ftp servers on LAN
From: Turbo <sandeep_kr () students iiit net>
Date: Sat, 5 May 2007 22:27:16 +0530 (IST)
I wonder why are the results not the same for both of us. On my network :-
$ time nmap -n -P0 -sT -p 21 -oG out --max-retries 0 -iL IPs.txt ... ...Nmap finished: 8960 IP addresses (8960 hosts up) scanned in 264.766 seconds
real 4m24.861s user 4m8.116s sys 0m2.164s $ time ./NetworkScanner 21 255 IPs.txt ... ... real 1m42.182s user 0m0.264s sys 0m2.284sThe reason seems to be the no. of addresses to scan. Here I am trying to scan 8960 addresses. For 256 addresses here are the results( which is similar to yours):-
$ time nmap -n -P0 -sT -p 21 -oG out --max-retries 0 -iL IPs.txt ... ... Nmap finished: 256 IP addresses (256 hosts up) scanned in 0.976 seconds real 0m0.984s user 0m0.112s sys 0m0.036s $ time ./a.out 21 255 IPs.txt ... ... real 0m3.155s user 0m0.008s sys 0m0.136sI did all my fine-tuning using 8960 IPs, and I found nmap was slower. But this example makes me believe that I can still fine-tune nmap better. I will try and update you.
Thanks. On Sat, 5 May 2007, Pranay Kanwar wrote:
Hi, Looking at your problem nmap can do it faster :) ( kindly ignore the ip class :) ) %time ./propecia 172.31.1 21 172.31.1.11 172.31.1.15 172.31.1.24 172.31.1.41 172.31.1.60 real 0m1.029s user 0m0.000s sys 0m0.008s %time nmap -n -P0 -sT -p 21 -oG out --max-retries 0 172.31.1.0/24 &>/dev/null ; grep open out real 0m0.916s user 0m0.036s sys 0m0.037s Host: 172.31.1.11 () Ports: 21/open/tcp//ftp/// Host: 172.31.1.15 () Ports: 21/open/tcp//ftp/// Host: 172.31.1.24 () Ports: 21/open/tcp//ftp/// Host: 172.31.1.41 () Ports: 21/open/tcp//ftp/// Host: 172.31.1.60 () Ports: 21/open/tcp//ftp/// The option -P0 don not ping host before scanning, -n no reverse dns resolution, max retries 0 , all these options make nmap sort of *similiar* to propecia. Note: nothing beats nmap :D. Regards, warl0ck // MSG http://www.metaeye.org
-- 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
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)