Determine software used to access unix server


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I am having a doubt.

Is it possible to find out and log the user agent of the client accessing the unix server?

For example, I can access a server via PuTTY, WinSCP, WS_FTP etc...

Is it possible to determine and log which software is used to connect to the server?

Please fill in your inputs.

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  • 3 weeks later...

That can be done with a tool like nmap. nmap sends several packages to a determined address (in this case the client accessing address), and analyses the reply. With that data it is possible to determine what is the operating system running on that remote host, this is called "OS fingerprinting". Check the nmap man pages for more details. This is easy to implement with a simple script and pipe the resulting data into a log file for instance.

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  • 1 month later...
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