OpenVPN - how to find who's connected?

[jabr at blu.org (John Abreau)]

John Abreau wrote:
> Is there an easy way to determine who's currently connected to an 
> OpenVPN server when it's using udp? I've been looking through the 
> openvpn.log file, but it's not clear what corresponds to a connection 
> starting and a connection stopping. I spent an hour searching on google 
> for something useful, but ame up empty.
> 
> There is an occasional "Peer Connection Initiated" that looked relevant 
> at first, but then it turned out these appeared at unpredictable 
> intervals for a while, then stopped appearing entirely, for a connection 
> that was on continuously over the weekend.
> 
> With the pptp vpn I'm replacing, I could look at the tun* devices with 
> ifconfig to determine who was currently using the vpn. With OpenVPN, I 
> have a single tap0 device which tells me nothing about the individual 
> clients.

Never mind; turns out openvpn-status.log has that information. I had 
done a tail of that file to check it, on the assumption that it was 
appended to like normal log files, and when I saw Nov 3, I then assumed 
it wasn't being appended to very often.

But it turns out the file is actually completely overwritten every 
minute, and reflects exactly the information I'm looking for.


-- 
John Abreau / Executive Director, Boston Linux & Unix
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