Created
April 23, 2025 05:08
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VPN watchdog - monitor if vpn tunnel is up.
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| #!/bin/bash | |
| # Config | |
| INTERFACE="wg0" | |
| SERVICE="wg-quick@${INTERFACE}.service" | |
| CHECK_INTERVAL=30 | |
| MAX_RETRIES=5 | |
| RETRY_DELAY=10 | |
| check_vpn() { | |
| ping -c 2 -W 2 YOURVPNIPHERE > /dev/null 2>&1 # Replace with your VPN endpoint or a pingable host only accessible through VPN | |
| return $? | |
| } | |
| restart_vpn() { | |
| echo "[INFO] VPN seems down. Restarting $SERVICE..." | |
| sudo systemctl restart "$SERVICE" | |
| } | |
| reboot_server() { | |
| echo "[ERROR] VPN still not working after $MAX_RETRIES attempts. Rebooting system..." | |
| sudo reboot | |
| } | |
| while true; do | |
| if ! check_vpn; then | |
| echo "[WARNING] VPN connection appears to be down." | |
| attempts=0 | |
| while ! check_vpn && [ $attempts -lt $MAX_RETRIES ]; do | |
| restart_vpn | |
| sleep $RETRY_DELAY | |
| ((attempts++)) | |
| done | |
| if ! check_vpn; then | |
| reboot_server | |
| fi | |
| else | |
| echo "[INFO] VPN is up." | |
| fi | |
| sleep $CHECK_INTERVAL | |
| done |
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Create a service or add to crontab.
Systems service could be :
[Unit]
Description=VPN Watchdog for WireGuard
After=network-online.target
Wants=network-online.target
[Service]
ExecStart=/usr/local/bin/vpn-watchdog.sh
Restart=always
RestartSec=10
User=root
[Install]
WantedBy=multi-user.target