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nmap target selection questions
From: Dexter Liu <dexliu () us ibm com>
Date: Tue, 24 May 2011 14:53:21 -0700

Hi nmap-dev:

I'm not sure this if this is the best place to post this (so if there's a 
better place please point the way!). I'm trying to use nmap to scan a 
whole bunch of IPs I got from an arp call on Windows. So I'm running 
something like this:

C:\testing\nmap-5.21-win32\nmap-5.21\nmap.exe -sV -sS -sU -p 
T:22,T:23,T:80,T:135,T:139,T:445,T:235,T:61616,U:52311 -O --osscan-guess 
-T 4 -oX nmapoutput 192.168.104.1, 192.168.104.10, 192.168.104.31, 
192.168.104.51, 192.168.104.71, 192.168.104.86, 192.168.104.176, 
192.168.104.197, 192.168.104.234, 192.168.104.235, 192.168.105.18, 
192.168.105.27, 192.168.106.4, 192.168.107.140, 192.168.107.255, 
224.0.0.22, 224.0.0.252, 239.255.255.250, 255.255.255.255, 9.0.8.1, 
9.0.9.1, 9.6.96.153, 9.6.96.179, 9.7.2.18, 9.7.2.62, 9.8.33.67, 9.8.33.80, 
9.9.72.23, 9.12.178.42, 9.13.44.147, 9.13.44.148, 9.17.136.83, 
9.17.205.111, 9.17.205.112, 9.17.205.114, 9.17.205.115, 9.17.205.116, 
9.18.21.20, 9.18.24.55, 9.18.81.58, 9.18.96.68, 9.18.96.69, 9.23.139.100, 
9.23.139.101, 9.25.130.38, 9.44.50.80, 9.44.50.100, 9.44.50.102, 
9.44.50.104, 9.44.51.57, 9.45.114.169, 9.45.124.64, 9.51.48.10, 
9.51.48.18, 9.51.48.132, 9.56.8.13, 9.56.248.124, 9.56.252.115, 
9.56.252.116, 9.56.252.117, 9.56.252.118, 9.63.36.19, 9.63.40.12, 
9.65.61.255, 9.177.11.162, 9.177.11.173, 224.0.0.22, 224.0.0.252, 
239.255.255.250

nmap fails when at 244.0.0.22 with this error message: nexthost: Failed to 
determine dst MAC address for target 224.0.0.22 QUITTING!

I have a couple of questions:

-First is there a switch or option that lets me continue scanning the rest 
of the IPs even though nmap fails on a particular IP? If 244.0.0.22 was 
the first target I specified, I would have errored out at the beginning 
and gotten zero results
-Second if I specify specific network interfaces with -e (specifically 
lo0), 244.0.0.22 scans as well, but other IPs fail. Is there a way I can 
specify a pool of network interfaces nmap should use when doing scanning, 
so that if one interface fails it can try again on another?
-Also I thought nmap was supposed to automatically figure out interfaces 
to run the scan on. It seems to work the large majority of the time. Why 
did I have to -e for some of them to get results? What are different about 
those IPs?


Thanks thanks thanks much in advance!

-Dex
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