Telegram notifications for (dis)connections to my pfSense OpenVPN Server

openvpn-telegram.md

OpenVPN Telegram Notifier

Features

Each time a client (dis)connects to the OpenVPN server of pfSense a new Telegram notification will be sent.

pfSense WebGUI configuration

Under "VPN" > "Servers" > your server > "Advanced Configuration" > "Custom Options" add the following lines.

client-connect    /root/openvpn-telegram.sh
client-disconnect /root/openvpn-telegram.sh
script-security 2

Script to be placed in the pfSense Box

Shell script to be created on the pfSense box. Access via SSH to the box and type nano /root/openvpn-telegram.sh Remember changing the <TOKEN> and the <CHAT_ID> variables with your own values.

#!/bin/sh
MYDATE=$(/bin/date +'%Y/%m/%d %H:%M:%S')
if [ "$script_type" = "client-connect" ]; then
  /usr/local/bin/curl -s -k "https://api.telegram.org/bot<TOKEN>/sendMessage" -d text="$MYDATE - VPN connection established. Username $common_name with external IP address $trusted_ip obtains internal IP address $ifconfig_pool_remote_ip." -d chat_id=<CHAT_ID>
elif  [ "$script_type" = "client-disconnect" ]; then
  /usr/local/bin/curl -s -k "https://api.telegram.org/bot<TOKEN>/sendMessage" -d text="$MYDATE - VPN connection terminated. Username $common_name with external IP address $trusted_ip frees internal IP address $ifconfig_pool_remote_ip." -d chat_id=<CHAT_ID>
fi
exit 0

With pfSense 2.5.2 and 21.05 , openvpn configuration doesn't works if doesn't set script as executable ( chmod +x /root/openvpn-telegram.sh )

It's workin in the 2.6.0 version?

Because the error is generate in the log OpenVPN: WARNING: Failed running command (--client-connect): could not execute external program

Hello @patrickpesegodinski
I deployed it on an earlier version of pfsense and have since then updated to 2.6.0 and it still works.
Maybe it has to do with setting the script as executable as the other commenter said?
Thanks for using the script, hope it helps.

Hello @jovimon

Yes, I setting the chmod +x in the script.

Hello @jovimon

I achieved run the script.

One question: It's possible add the variable to identify the name to server OPENVPN?