[SCRIPT] sh to check vpn client status and auto reconnect if disconnected

[dutuka]

Hello community,
my vpn service provider does not support keep alive in their setting, so i need another way to check if vpn client is connected and auto reconnect if it is disconnected, a sh script should do the job.

The scipt should do something like this:

nvram get vpn_client1_state # Check VPN client status
if response code is not 2 then # if vpn client is not connected then
service stop_vpnclient1 # stop vpn client
sleep 3s # pause 3 seconds
service start_vpnclient1 # start/connect vpn client

loop these commands for vpnclient[1-5]


My router is AX56U and can set up to 5 vpn clients, the status codes are:
2=connected
1= connecting
0=disconnected
-1= failed to connect

I dont know how to write sh script and hope someone can help me to make a working script, so that i can shedule it with crontab. Many thanks.

 

[dutuka]

I figure it out, this is my script.

#!/bin/sh
VPNclient1_Status=$(nvram get vpn_client1_state)
if [ "$VPNclient1_Status" -ne 2 ]
then
service stop_vpnclient1 && sleep 3s && service start_vpnclient1
fi

VPNclient2_Status=$(nvram get vpn_client2_state)
if [ "$VPNclient2_Status" -ne 2 ]
then
service stop_vpnclient2 && sleep 3s && service start_vpnclient2
fi

VPNclient3_Status=$(nvram get vpn_client3_state)
if [ "$VPNclient3_Status" -ne 2 ]
then
service stop_vpnclient3 && sleep 3s && service start_vpnclient3
fi

VPNclient4_Status=$(nvram get vpn_client4_state)
if [ "$VPNclient4_Status" -ne 2 ]
then
service stop_vpnclient4 && sleep 3s && service start_vpnclient4
fi

VPNclient5_Status=$(nvram get vpn_client5_state)
if [ "$VPNclient5_Status" -ne 2 ]
then
service stop_vpnclient5 && sleep 3s && service start_vpnclient5
fi

 

[abidarwish]

OVPN Client Connect Script

Run this script with cru set to every minute to check ovpn client connection and reconnect if a client is disconnected.

Download from here:

advpn.xyz

 

[dutuka]

This script can also work for another router, where exit code for connected state NOT 2 is

#!/bin/sh
if [ -z "$(pidof vpnclient1)" ]
then
   service restart_vpnclient1
fi

if [ -z "$(pidof vpnclient2)" ]
then
   service restart_vpnclient2
fi

if [ -z "$(pidof vpnclient3)" ]
then
   service restart_vpnclient3
fi

if [ -z "$(pidof vpnclient4)" ]
then
   service restart_vpnclient4
fi

if [ -z "$(pidof vpnclient5)" ]
then
   service restart_vpnclient5
fi