Good day. There is a file /var/run/openvpn-status.log into which notifications about the connection fall, updated once a minute:
example: 192.168. . , user,. . . : *, Thu Nov 24 13:00:18 2016
help, please, write a script engine that would parse this file all the time and (for example, as in the user example) send a notification message (var / mail / user2) to mail users a few pieces.
my poor non-working example: tail -f /var/run/openvpn-status.log | grep user | echo "$ user connected" | mail -s "$ user connected" user2