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deis n00b
Joined: 18 Feb 2006 Posts: 11
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Posted: Thu Jul 14, 2016 1:18 pm Post subject: Got tired of fighting with nmap |
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I'm trying to scan a range of local networks with nmap, but whenever I scan for a wider network, i.e. with more than 4096 (?) hosts (e.g. 10.10.0-255.1-254), I can't make nmap print the addresses of the hosts that are alive. It just tells me a number of hosts that are up (e.g. 5 up) without giving out their IPs. The actual nmap command is like follows (running as root):
nmap -p80 --open -PS80 -v2 -T4 <target network range>
If I substitute the network range with a certain IP or a smaller network range (i.e. with less than a certain number of nodes), nmap prints out the IPs of the hosts that are alive and have port 80 open. I tried different output options (-oN, -oG) but to no avail for bigger networks altogether...
Is it done on purpose and how to overcome this limitation (without splitting the range into smaller segments)? I'm using nmap 7.12 |
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eccerr0r Watchman
Joined: 01 Jul 2004 Posts: 9665 Location: almost Mile High in the USA
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Posted: Thu Jul 21, 2016 5:56 pm Post subject: |
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It almost seems that on the local subnet it can use a certain type of connection, and when you go outside you have to use the gateway/router and it may be filterring. Then again it seems like there might be a bug somewhere in nmap... dunno. Weird indeed. Don't know what your subnet size is but it might be tripping up nmap... _________________ Intel Core i7 2700K/Radeon R7 250/24GB DDR3/256GB SSD
What am I supposed watching? |
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deis n00b
Joined: 18 Feb 2006 Posts: 11
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Posted: Fri Jul 22, 2016 10:31 am Post subject: |
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Never mind, I switched to masscan and it works flawlessly (and faster at that) |
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JeroenMathon n00b
Joined: 11 Aug 2016 Posts: 21 Location: The Netherlands
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Posted: Thu Aug 11, 2016 1:49 pm Post subject: |
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Also another tool which i recommend is Angry ip scanner.
http://angryip.org
It is a very powerful tool for scanning massive networks. |
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