how do I scan all computers in my network with nmap?

Question

I am trying to use nmap to scan the computers on my network for conficker. I am using Windows. What do I put in the target for all computer on a given subnet?

It is running: nmap -T4 -A -v

I put in 192.168.1.0 and 192.168.1.255 but it did not work.

Thank you

score 3 · Answer 1 · edited Feb 28 '11 at 14:55

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192.168.1.0/24 is the subnet you need to specify if all the computers you want to reach are between 192.168.1.0 and 192.168.1.255.

edited Feb 28 '11 at 14:55

Sven

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answered Feb 28 '11 at 14:40

Shaun Dewberry

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Enough with the classes. Classful networking has been replaced ~15 years ago by CIDR. – mkudlacek Feb 28 '11 at 14:52
There are no classes anymore. See http://en.wikipedia.org/wiki/CIDR and, even better, http://serverfault.com/questions/49765/how-does-subnetting-work – Sven Feb 28 '11 at 14:54
/24 is CIDR notation. – Shaun Dewberry Mar 04 '11 at 13:31

Sven · Accepted Answer · 2011-02-28T14:59:41.023

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nmap -PN -T4 -p139,445 -n -v --script=smb-check-vulns \ 
   --script-args safe=1 192.168.1.0/24

edited Feb 28 '11 at 14:59

answered Feb 28 '11 at 14:42

Sven

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how do I scan all computers in my network with nmap?

2 Answers2