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Questions tagged [os-fingerprinting]

23 questions
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OS fingerprinting via TCP

I have searched online about this topic and the only information I got is that TCP SYN/ACK can be used to know the type of the target OS. If that is true, I don't understand how this occurs? Does TCP handshaking lead to OS fingerprinting?
Steve
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How to find the OS of the target machine

I am new to this field. Currently I am using Linux OS and my question is how can I find the OS of another machine to which I do not have a direct access. I am interested in any possibilities which can lead me to this information. Also I need to…
Alex
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Browser Fingerprinting and Passwords stored by browser

I am using the Firefox browser on a Linux system and it came to my knowledge that it is possible for sites to take a fingerprint of the user visiting their homepages. So I actually have four questions regarding the thread: 1) It was written in the…
Junior J. Garland
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Does Nmap requires a closed TCP port to do OS fingerprinting?

I was checking the security of a server by running Nmap. Last time it gives me the following results, indicating that OS could not be fingerprinted: PORT STATE SERVICE VERSION 21/tcp filtered ftp 22/tcp open ssh OpenSSH…
Question Overflow
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Fingerprinting Windows Architecture from a file on remote system

This is a post following up with this one. Similar situation as the above post - I'd like to know if there's a way to find out the architecture (x86 or x64) of a windows system from a file on a remote system. This is assuming I can only read files…
Izy-
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How os fingerprinting works and how to prevent it in browser?

For privacy I always changed my useragent of browser regularly and it used to work. But lately changing useragent alone in browser dosen't prevent os fingerprinting. Tools like https://browserleaks.com can correctly guess my os eventhough I have…
Eka
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Re-run nmap OS fingerprint match with existing subject fingerprint

I have a collection of nmap subject fingerprints (described here), but have updated my local (private) reference fingerprint database since they were collected. Is there any existing way to re-match these subject fingerprints against the updated…
njv299
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Block OS fingerprinting without using iptables?

I have a Linux machine connected to a Windows 98 PC on port 104. Now I want to block the OS fingerprinting using nmap for the windows 98 PC. I tried using iptables (blocking that particular port) but that stops the communication altogether on the…
Megja
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