Add Google IP address list updater script for RouterOS

[gpas45]

Summary

Added a new RouterOS script that automatically downloads and maintains an up-to-date list of Google's public IP address ranges for policy routing and VPN purposes.

Changes

• New file: routeros/google-ip-updater.rsc

  • Fetches official Google IP ranges from https://www.gstatic.com/ipranges/goog.json
  • Parses JSON response to extract IPv4 prefixes without requiring temporary files
  • Updates RouterOS address-list named VPN_ytb with Google's IP ranges
  • Includes error handling for network failures, empty responses, and invalid entries
  • Provides detailed logging of operations (added/removed/skipped entries)
  • Compatible with RouterOS 6.43+ and 7.x

• Updated: README.md

  • Added documentation entry for the new google-ip-updater.rsc script

Implementation Details

• In-memory JSON parsing: Downloads JSON directly into a variable and parses it using string operations, avoiding temporary file creation
• Safe list updates: Collects all valid entries before updating the address-list, preventing the list from becoming empty during updates
• Robust error handling: Gracefully handles network errors, malformed JSON, and invalid CIDR entries with appropriate logging
• Scheduler-ready: Designed to run on a schedule (e.g., daily/weekly) via RouterOS scheduler
• TLS flexibility: Uses check-certificate=no for environments without complete CA certificate stores

https://claude.ai/code/session_01G7uENR3Un39dzN9EVxjZfk