Nmap (no ports showing open)

sfloyd13 · 04-16-2011, 02:37 PM

Hello,

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.

SF

acid_kewpie · 04-16-2011, 02:40 PM

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?

sibe · 04-16-2011, 03:34 PM

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Quote:

Originally Posted by sfloyd13

... all ports came back with the status as unknown (NO OPEN PORTS

nmap has so many options, what option did you use?

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sibe

spazticclown · 04-16-2011, 05:39 PM

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.

Code:

$ nmap -sT [ip of router]
Starting Nmap 5.21 ( http://nmap.org ) 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
PORT   STATE SERVICE
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!

Code:

$ man nmap