126 lines
3.1 KiB
Bash
126 lines
3.1 KiB
Bash
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#!/bin/bash
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# Mullvad_VPN_Check
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# A script that checks for a Mullvad VPN connection, logs the status,
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# and sends alerts if the VPN status changes.
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# Set Discord webhook
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WEBHOOK_URL="DISCORD_WEBHOOK_URL"
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# Temp file to store the VPN connection status
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STATUS_FILE="/tmp/vpn_status.log"
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# Function to send VPN down alert
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vpn_down_alert() {
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curl -H "Content-Type: application/json" -X POST --data @- "$WEBHOOK_URL" <<EOF
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{
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"content": null,
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"embeds": [
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{
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"title": "VPN Connectivity - WARNING",
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"description": "\"$(hostname)\" is not going through a Mullvad VPN connection",
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"color": 13238272,
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"fields": [
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{
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"name": "Date and Time of Test:",
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"value": "$(date +'%Y-%m-%d %H:%M:%S')"
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},
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{
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"name": "Current ISP",
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"value": "$ORG"
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},
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{
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"name": "Current IP",
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"value": "$IP"
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}
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]
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}
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],
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"attachments": []
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}
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EOF
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}
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# Function to send VPN restored alert
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vpn_up_alert() {
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curl -H "Content-Type: application/json" -X POST --data @- "$WEBHOOK_URL" <<EOF
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{
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"content": null,
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"embeds": [
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{
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"title": "VPN Connectivity - RESTORED",
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"description": "\"$(hostname)\" is now going through a Mullvad VPN connection",
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"color": 3066993,
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"fields": [
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{
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"name": "Date and Time of Test:",
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"value": "$(date +'%Y-%m-%d %H:%M:%S')"
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},
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{
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"name": "Current ISP",
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"value": "$ORG"
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},
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{
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"name": "Current IP",
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"value": "$IP"
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}
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]
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}
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],
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"attachments": []
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}
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EOF
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}
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# Function to check the VPN status and act accordingly
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check_vpn_status() {
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mullvad_exit_ip="$1"
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# Check the current status (true for VPN, false for no VPN)
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if [ "$mullvad_exit_ip" = "false" ]; then
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echo "VPN not connected, sending alert..."
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# Send alert if VPN was connected last time
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if [ "$previous_status" = "true" ]; then
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vpn_down_alert
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echo "VPN down alert sent!"
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fi
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# Log the current status
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echo "false" > "$STATUS_FILE"
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else
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echo "VPN connected."
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# Send a "VPN restored" alert if VPN was not connected last time
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if [ "$previous_status" = "false" ]; then
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vpn_up_alert
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echo "VPN restored alert sent!"
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fi
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# Log the current status
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echo "true" > "$STATUS_FILE"
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fi
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}
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# Fetch JSON data from Mullvad API
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json=$(curl -s https://ipv4.am.i.mullvad.net/json)
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# Get Reported IP and ISP
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IP=$(echo "$json" | grep -oE '"ip":\s*"[^"]+"' | grep -oE '[0-9.]+')
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ORG=$(echo "$json" | grep -oP '(?<="organization":")[^"]+')
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# Parse JSON and extract "mullvad_exit_ip" (true if VPN, false if not)
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mullvad_exit_ip=$(jq -r '.mullvad_exit_ip' <<< "$json")
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# Check if the status log file exists, if not create it with a default value (false)
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if [ ! -f "$STATUS_FILE" ]; then
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echo "false" > "$STATUS_FILE"
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fi
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# Read the previous VPN status from the log file
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previous_status=$(cat "$STATUS_FILE")
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# Check the current VPN status and take action
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check_vpn_status "$mullvad_exit_ip"
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