Nmap Development mailing list archives
Nmap 4.x --max-retries option not being honored for "Ping Scan's"
From: <codeproj () nym hush com>
Date: Wed, 20 Dec 2006 09:57:18 -0800
All, I just found an apparent bug in all versions of nmap from 4.00 to 4.20 release. The --max-retries option is not being honored for "Ping Scans" (i.e., command-line option "-sP"). I am aware that the "--max-retries" option was fixed for "regular" scans in version 4.20, however, this option is still *not* being honored for "Ping Scans". Eg. $ ./nmap-4.11 --send-ip --packet-trace --max-retries 0 -n -sP -PE - PS80 192.168.0.200 Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2006-12-20 09:25 PST SENT (0.0140s) ICMP 192.168.0.100 > 192.168.0.200 Echo request (type=8/code=0) ttl=59 id=30036 iplen=28 SENT (0.0150s) TCP 192.168.0.100:41410 > 192.168.0.200:80 S ttl=38 id=6633 iplen=44 seq=2982239518 win=3072 SENT (1.0340s) ICMP 192.168.0.100 > 192.168.0.200 Echo request (type=8/code=0) ttl=41 id=54427 iplen=28 SENT (1.0340s) TCP 192.168.0.100:41411 > 192.168.0.200:80 S ttl=47 id=48919 iplen=44 seq=662789470 win=4096 Note: Host seems down. If it is really up, but blocking our ping probes, try -P0 Nmap finished: 1 IP address (0 hosts up) scanned in 2.055 seconds As you can see, although the --max-retries option is set to 0 (ie. no retries), the Ping Scan packets are sent out "twice" instead of only once. This behavior occurs regardless of the Ping Scan options that are selected. I have tested this issue on all release versions of nmap from version 4.00 to 4.20, and it is present in all of them. Haven't had time to check the code to see where the problem lies yet, but thought I should at least report the problem. Thanks! _______________________________________________ Sent through the nmap-dev mailing list http://cgi.insecure.org/mailman/listinfo/nmap-dev Archived at http://SecLists.Org
Current thread:
- Nmap 4.x --max-retries option not being honored for "Ping Scan's" codeproj (Dec 20)
- Re: Nmap 4.x --max-retries option not being honored for "Ping Scan's" Martin Mačok (Dec 21)