Nmap Development mailing list archives
Re: Scan 3 thousand host consume severals hour
From: Ron <iago () valhallalegends com>
Date: Sun, 18 Dec 2005 22:50:41 -0600
In addition to what Sina already said (which is good advice), there's also a section in nmap's manpage about timing and performance: TIMING AND PERFORMANCE: -T[0-5]: Set timing template (higher is faster) --min_hostgroup/max_hostgroup <msec>: Parallel host scan group sizes --min_parallelism/max_parallelism <msec>: Probe parallelization --min_rtt_timeout/max_rtt_timeout/initial_rtt_timeout <msec>: Specifies probe round trip time. --host_timeout <msec>: Give up on target after this long --scan_delay/--max_scan_delay <msec>: Adjust delay between probes By tweaking those options, you can probably squeeze some extra performance out of it. Of course, you have to be careful; if you set it to scan too fast, you might miss hosts and ports. It might take some experimentation to get it set up properly. Good luck Ron Ricardo A. Reis wrote:
Hi, I work on the UNIFESP a large Brazilian University with +/- 3000 windows workstations, now i create a routine capable to scan for worms and softwares listening, in my test the scan consumo +/- 49 hours, because many workstations with WinXP use firewall. The question is with is possible reduce the time ? i use this line on FreeBSD Monitor, #nmap -v -sT -sU -p 1-65535 -n 172.16.0.0/16 Thanks Ricardo A. Reis UNIFESP Unix and Network Admin _______________________________________________________ Yahoo! doce lar. Faça do Yahoo! sua homepage. http://br.yahoo.com/homepageset.html ------------------------------------------------------------------------ _______________________________________________ Sent through the nmap-dev mailing list http://cgi.insecure.org/mailman/listinfo/nmap-dev
_______________________________________________ Sent through the nmap-dev mailing list http://cgi.insecure.org/mailman/listinfo/nmap-dev
Current thread:
- Scan 3 thousand host consume severals hour Ricardo A. Reis (Dec 18)
- RE: Scan 3 thousand host consume severals hour Sina Bahram (Dec 18)
- RE: Scan 3 thousand host consume severals hour Ricardo A. Reis (Dec 19)
- Re: Scan 3 thousand host consume severals hour Andreas Ericsson (Dec 20)
- Re: Scan 3 thousand host consume severals hour Ricardo A. Reis (Dec 22)
- RE: Scan 3 thousand host consume severals hour Ricardo A. Reis (Dec 19)
- RE: Scan 3 thousand host consume severals hour Sina Bahram (Dec 18)
- Re: Scan 3 thousand host consume severals hour Ron (Dec 18)
- Re: Scan 3 thousand host consume severals hour Ricardo A. Reis (Dec 19)