In this updated tutorial, which is a result of a discussion in the Turris Forum , we use the function create_notification, which sends the message according to the settings in the administration Foris, section Maintenance

1) in file /etc/config/openvpn add following lines:

If you are using Foris openVPN plugin, add it to the section config openvpn 'server_turris

option script_security '2'
option client_connect '/etc/openvpn/up.sh'
option client_disconnect '/etc/openvpn/down.sh'

2) create file /etc/openvpn/up.sh

up.sh

#!/bin/bash
message="$(echo -e "${common_name} connected      to: ${HOSTNAME} \\nRemote:  ${untrusted_ip} \\nVirtual: ${ifconfig_pool_remote_ip}")"
/usr/bin/create_notification -s news "${message}"
/usr/bin/notifier
exit 0

3) create file /etc/openvpn/down.sh

down.sh

#!/bin/bash
message="$(echo -e "${common_name} disconnected from: ${HOSTNAME} \\nRemote:  ${untrusted_ip} \\nVirtual: ${ifconfig_pool_remote_ip}")"
/usr/bin/create_notification -s news "${message}"
/usr/bin/notifier
exit 0

4) set permission 0755 for scripts

chmod 0755 /etc/openvpn/up.sh

chmod 0755 /etc/openvpn/down.sh

5) make sure files are backed-up

If you want to include these extra scripts in the backups of the router, add /etc/openvpn directory to the /etc/config/backups. Something like:

  config generate generate
       list dirs "/etc/openvpn"

6) restart OpenVPN

/etc/init.d/openvpn restart