Nmap Development mailing list archives
Re: Suspect that --host-timeout is not working in 4.50?
From: jah <jah () zadkiel plus com>
Date: Fri, 14 Dec 2007 22:42:21 +0000
On 14/12/2007 20:52, Randolph Reitz wrote:
Hi, I have installed nmap 4.50 on the scanner farm here at Fermilab and I've noticed that some nmap scans are running a long time. For example ... scanner 5311 31009 0 12:17 ? 00:00:00 /bin/bash ./bin/ run_nmap.sh --pro -d 1 -sS -p 1-65535 -A 131.225.232.A 131.225.232.B 131.225.232.C 131.225.232.D root 5319 5311 2 12:17 ? 00:03:10 /usr/local/bin/nmap - sS -p 1-65535 -P0 -T4 --osscan-limit --osscan-guess --host-timeout 15m -A -oX - 131.225.232.D It's now date Fri Dec 14 14:47:47 CST 2007 The nmap started at 12:17 and has collected 3 minutes of CPU so far. The host_timeout is set for 15 minutes. So far, I've collected hundreds of examples of long-running nmap scans. However, I've noticed that nmap 4.50 is much faster than 4.2. Does anyone else have a problem with --host-timeout?
Hello Randolph, I don't seem to be having any problems with --host-timeout, may I propose a quick test... Perform a simple test scan against a couple of hosts with the aim of finding a host/scan combination that takes at least 2 seconds, but as short as possible (this is supposed to be a quick test). An example might be: nmap -d -sU -p1-5000 <target> When you have a total scan time that suits, add the lowest permissible host-timeout (1501ms): nmap -d -sU -p1-5000 --host-timeout 1501 <target> if host-timeout is working properly, you should see something like: ... Completed ARP Ping Scan at 22:35, 0.05s elapsed (1 total hosts) ... <target> timed out during UDP Scan (0 hosts left) Completed UDP Scan at 22:35, 1.46s elapsed (1 host timed out) Host <target> appears to be up ... good. Skipping host <target> due to host timeout ... If that's a success, you could start building up the scan paramaters again and hopefully determine what's gone wrong. Hope that helps a bit, jah _______________________________________________ Sent through the nmap-dev mailing list http://cgi.insecure.org/mailman/listinfo/nmap-dev Archived at http://SecLists.Org
Current thread:
- Suspect that --host-timeout is not working in 4.50? Randolph Reitz (Dec 14)
- Re: Suspect that --host-timeout is not working in 4.50? jah (Dec 14)
- Re: Suspect that --host-timeout is not working in 4.50? Randolph Reitz (Dec 15)
- Re: Suspect that --host-timeout is not working in 4.50? jah (Dec 15)
- Re: Suspect that --host-timeout is not working in 4.50? Randolph Reitz (Dec 16)
- Re: Suspect that --host-timeout is not working in 4.50? jah (Dec 20)
- Re: Suspect that --host-timeout is not working in 4.50? Fyodor (Dec 20)
- Re: Suspect that --host-timeout is not working in 4.50? doug (Dec 20)
- Re: Suspect that --host-timeout is not working in 4.50? Fyodor (Dec 20)
- Re: Suspect that --host-timeout is not working in 4.50? Fyodor (Dec 20)
- Re: Suspect that --host-timeout is not working in 4.50? doug (Dec 21)
- Re: Suspect that --host-timeout is not working in 4.50? Fyodor (Dec 21)
- Re: Suspect that --host-timeout is not working in 4.50? Randolph Reitz (Dec 15)
- Re: Suspect that --host-timeout is not working in 4.50? jah (Dec 14)