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Nmap O.s Detection Problem

Skorpinok Rover

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When i run nmap O.S detection scan for windows xp within Pentest lab, i get this ' Too many fingerprints match this host to give specific OS details , i tried this in vmware workstation before it gave me same mesage , however the mac address seems right, i run backtrack 5r2/windows xp sp3 on virtual box. my network configuration: NAT & HOST ONLY for Windows XP & Backtrack 5R2.please suggest me how to solve this ? Thanks in advance.

scan details:

nmap -O

Starting Nmap 5.61TEST4 ( http://nmap.org ) at 2012-05-05 23:33 GST

Nmap scan report for

Host is up (0.00042s latency).

All 1000 scanned ports on are filtered

MAC Address: 08:00:27:C9:67:41 (Cadmus Computer Systems)

Too many fingerprints match this host to give specific OS details

Network Distance: 1 hop


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Yeah, what he (Mr-Protocol) said. If there are not ports responding to network traffic, nmap cannot effectively fingerprint the OS. One of its fingerprinting methods relies on the response codes from certain packets to determine what OS it is as well as information about protocols, versions, etc.. But if it cannot get responses, it cannot guess the OS.

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  • 3 weeks later...

You could also try: nmap -A

Sometimes it will hint what OS it is under service info. I think it queries mdns to get information unlike a regular OS scan which requires ports to be open in order for it to work. If there is no information on the service info line, it is probably Windows.

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