Palo Alto FQDN Monitor

The Palo Alto FQDN Monitor is a lightweight, policy-aware test harness that validates DNS resolution, IP address stability, and reachability for FQDNs used in Palo Alto firewall rules, VPNs, and security services. It accepts a list of FQDNs, optional ports, and protocols, and executes periodic checks from multiple synthetic locations. Results are stored in a structured record and exposed as outputs suitable for alerting pipelines.
The core logic uses DNS queries, TCP/UDP probes, and latency measurements to derive status. If all tests pass for a given FQDN, the output is Up with average latency. If any test fails, Down or Partial is returned, with a per-check detail set. Advanced features include region-based checks, check intervals, timeout configuration, and export options for CSV/JSON.
This tool benefits network operations teams, security operations centers, and IT admins who need consistent visibility across Palo Alto configurations. Its differentiators include multi-location synthetic checks, explicit FQDN health scoring, and integration-ready outputs for monitoring systems. Use cases include pre-change validation, firewall policy testing, and outage investigations.