Results 1 to 5 of 5

Thread: NMap Os Detection Problem

  1. #1
    Member
    Join Date
    Jun 2006
    Posts
    107

    Default NMap Os Detection Problem

    Dears,

    I have started learning pentesting on a virtual lab i built within BackTrack 2.0
    The lab consists of Win2000 & FreeNAS machines, and I am performing the testing from my BT2.0 box.

    I am learning on NMap now, and when I try to do an OS detection (on the win2k machine) NMap fails to guess the OS, with the following message:
    Code:
    No exact OS matches for host
    Could anyone help on this. I am using NMap 4.20

    Thanks in advance,

  2. #2
    My life is this forum thorin's Avatar
    Join Date
    Jan 2010
    Posts
    2,629

    Default

    What's the full nmap command you're using?

  3. #3
    Member
    Join Date
    Jun 2006
    Posts
    107

    Default

    I am using

    Code:
    nmap -O -v xxx.xxx.xxx.xxx

  4. #4
    My life is this forum thorin's Avatar
    Join Date
    Jan 2010
    Posts
    2,629

    Default

    How many ports are open on the system?
    I guess you could also try:
    Code:
    nmap -O -v --osscan-guess xxx.xxx.xxx.xxx
    Which just tells it to guess the OS more aggressively.
    http://insecure.org/nmap/man/man-briefoptions.html

    The whole output you're getting might help as well. You can use -oN <filepath/filename> or just redirect stdout > <filepath/filename> for the output (or if it's really short just copy/paste it).

  5. #5
    Junior Member
    Join Date
    Jul 2007
    Posts
    47

    Default

    I know this is an old thread but for OS detection you would be better off using Xprobe2 instead of Nmap - It's much more reliable. Or better yet use them both but if there is a discrepency lean towards what Xprobe 2 indicates.
    Removed by -=Xploitz=-
    We do NOT allow external links. We only allow "internal" links to our forums. See PM's.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •