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Scan your LAN for unauthorized IPs

Terminal - Scan your LAN for unauthorized IPs
diff <(nmap -sP 192.168.1.0/24 | grep ^Host | sed 's/.appears to be up.//g' | sed 's/Host //g') auth.hosts | sed 's/[0-9][a-z,A-Z][0-9]$//' | sed 's/</UNAUTHORIZED IP -/g'
2009-03-12 05:28:08
User: bandit36
Functions: diff grep sed
1
Scan your LAN for unauthorized IPs

populate the auth.hosts file with a list of IP addresses that are authorized to be in use and when you run this command it will return the addresses that are pingable and not in the authorized list.

Can be combined with the "Command line Twitter" command to tweet unauthorized access.

Alternatives

There is 1 alternative - vote for the best!

Terminal - Alternatives

Know a better way?

If you can do better, submit your command here.

What others think

Running it shows: "diff: auth.hosts: No such file or directory". So I must give it a thumbs down.

Comment by plasticdoc 328 weeks and 6 days ago

That's because "auth.hosts" is a text file listing all the authorized IP addresses on the network.

Please see the description in white.

Comment by bandit36 328 weeks and 6 days ago

Is there anyway to do this with mac addresses? I have populated the auth.hosts file with all of the authorized mac addresses on my network, but not quite sure what I would need to change to make it work.

Comment by etsorbme8 328 weeks and 4 days ago

Your point of view

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