How to find connected hosts at network (vpn or lan)

Posted by Javier Novoa C. on Stack Overflow See other posts from Stack Overflow or by Javier Novoa C.
Published on 2009-08-17T17:45:23Z Indexed on 2010/04/07 9:03 UTC
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linux

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networking

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vpn

Hello, I'm looking for possible solutions to the following need:

I have a VPN configured (using openVPN over Linux, BTW), and I want to know at any moment which hosts are connected to it. I recognize that it probably is the same thing as trying to know which hosts are connected to a lan, so any of the solutions might do the job...

The fact is that I once used a hamachi vpn on linux and with it I had the chance to know which hosts were connected to a particular network where I belonged, so I was wondering if something similar might be possible in openVPN (or even any VPN and/or any LAN).

Preferably, I'm looking for opensource/free sw solutions, or maybe the hints to program it myself (in the most simple way if possible, not that I don't know how to program, but I'm trying to achieve this in a simple manner). But anyway, if there are no os/fsw solutions, any other one might do...

Thanks a lot!

Javier, Mexico city

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