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Old 04-16-2011, 03:37 PM   #1
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Nmap (no ports showing open)


I scanned my home machine (windows vista) with Nmap, after disabling the firewall and all ports came back with the status as unknown (NO OPEN PORTS). Can anyone tell me why no ports are showing as open? Thanks.

Old 04-16-2011, 03:40 PM   #2
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Well ARE there any open ports? What are you expecting to see? The full output of nmap would be a good thing to post for more clarity. Does this have anything to do with Linux?
Old 04-16-2011, 04:34 PM   #3
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Originally Posted by sfloyd13 View Post
... all ports came back with the status as unknown (NO OPEN PORTS
nmap has so many options, what option did you use?

Old 04-16-2011, 06:39 PM   #4
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You can try a target that you know has open ports, say your (personally owned or with express permission of the owner) router. Scanning without permission may be seen as a form of attack and can be illegal in some areas/situations.
$ nmap -sT [ip of router]
Starting Nmap 5.21 ( ) at 2011-04-16 15:35 PDT
Nmap scan report for Service ([ip of router])
Host is up (0.023s latency).
Not shown: 997 closed ports
23/tcp open  telnet
53/tcp open  domain
80/tcp open  http

Nmap done: 1 IP address (1 host up) scanned in 2.75 seconds
This will tell you if nmap is working properly.

for more information on nmap check out the man pages!
$ man nmap


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