Nmap Development mailing list archives
Re: New development in host discovery: response rate scaled congestion control
From: Brandon Enright <bmenrigh () ucsd edu>
Date: Thu, 6 Sep 2007 04:58:20 +0000
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Wed, 5 Sep 2007 18:07:21 -0600 plus or minus some time David Fifield <david () bamsoftware com> wrote:
On Thu, Sep 06, 2007 at 12:01:30AM +0000, Brandon Enright wrote:$ du -sh david_output/ 24G david_output/That's 24G of coolness points you get for doing so much testing. David
Okay well after wiping out that 24G of coolness, I've made 5.2G more. -d2 with --packet-trace is *extremely* verbose... I did 2 rounds of testing, 4 scans per round. The first was done with r5786 and the second with r5788. Here are the test results for round 1: Same base template I've been using. All scans were started at the same time. 64-64: (david_new_2a.svg) # Nmap done at Thu Sep 6 01:31:57 2007 -- 186368 IP addresses (10602 hosts up) scanned in 5013.688 seconds 64-2048: (david_new_2b.svg) # Nmap done at Thu Sep 6 01:16:10 2007 -- 186368 IP addresses (7656 hosts up) scanned in 4066.421 seconds 2048-2048: david_new_2c.svg) # Nmap done at Thu Sep 6 01:16:10 2007 -- 186368 IP addresses (7656 hosts up) scanned in 4066.421 seconds NOMIN-NOMAX (just -T5): david_new_2d.svg) # Nmap done at Thu Sep 6 01:47:37 2007 -- 186368 IP addresses (8972 hosts up) scanned in 5943.742 seconds For some reason not specifying a min or max took longer and found far fewer hosts than 64-64 did. This was my primary motivation for doing round 2 with r5788. Here is round 2, same settings, just added the cwnd scaling factor cap of 50: 64-64: (david_new_3a.svg) # Nmap done at Thu Sep 6 04:09:06 2007 -- 186368 IP addresses (8684 hosts up) scanned in 5334.607 seconds 64-2048: (david_new_3b.svg) # Nmap done at Thu Sep 6 03:51:59 2007 -- 186368 IP addresses (7105 hosts up) scanned in 4306.403 seconds 2048-2048: (david_new_3c.svg) # Nmap done at Thu Sep 6 03:44:17 2007 -- 186368 IP addresses (7809 hosts up) scanned in 3843.870 seconds NOMIN-NOMAX (just -T5): (david_new_3d.svg) # Nmap done at Thu Sep 6 04:24:50 2007 -- 186368 IP addresses (7795 hosts up) scanned in 6275.512 seconds Again, not specifying any parallelism took longer and performed worse. The difference in hosts found between round 1 and round 2 is because these scans were done late in the work day as machines were being turned off. I can't explain these results. I've generated graphs these scans in case those will be helpful at all. I removed the y axis limit of 80 before generating these. The graphs are located at: http://noh.ucsd.edu/~bmenrigh/nmap/ See the names above to see which scans corresponds to which graph. I can grep through the logs to provide drop data etc if you're interested. Brandon -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (GNU/Linux) iD8DBQFG34jsqaGPzAsl94IRAmOPAJ9+fRyLnE734GV0QCw9RHW16/4kowCeIbwQ wraEIrhdxvuhUZBktmyS178= =Tv57 -----END PGP SIGNATURE----- _______________________________________________ Sent through the nmap-dev mailing list http://cgi.insecure.org/mailman/listinfo/nmap-dev Archived at http://SecLists.Org
Current thread:
- New development in host discovery: response rate scaled congestion control David Fifield (Sep 05)
- Re: New development in host discovery: response rate scaled congestion control Brandon Enright (Sep 05)
- Re: New development in host discovery: response rate scaled congestion control David Fifield (Sep 05)
- Re: New development in host discovery: response rate scaled congestion control Brandon Enright (Sep 05)
- Re: New development in host discovery: response rate scaled congestion control David Fifield (Sep 05)
- Re: New development in host discovery: response rate scaled congestion control Brandon Enright (Sep 05)
- Re: New development in host discovery: response rate scaled congestion control David Fifield (Sep 05)
- Re: New development in host discovery: response rate scaled congestion control Brandon Enright (Sep 05)
- Re: New development in host discovery: response rate scaled congestion control David Fifield (Sep 06)
- Re: New development in host discovery: response rate scaled congestion control Brandon Enright (Sep 06)
- Re: New development in host discovery: response rate scaled congestion control David Fifield (Sep 06)
- Re: New development in host discovery: response rate scaled congestion control Brandon Enright (Sep 06)
- Re: New development in host discovery: response rate scaled congestion control David Fifield (Sep 05)
- Re: New development in host discovery: response rate scaled congestion control Brandon Enright (Sep 05)
- Re: New development in host discovery: response rate scaled congestion control David Fifield (Sep 05)