Check if a port is open on a server or IP address. Verify firewall rules and port forwarding instantly.
One check tells you it's open right now. ObserveOne's TCP monitor checks this exact host and port on a schedule and alerts you the moment it stops responding.
Side-by-side breakdowns, no fluff.
Port scanning is essential for network administrators and developers to verify that services (like Web Servers, Email, or Databases) are reachable from the internet. It helps debug connection issues and audit firewall security.
Ensure only necessary ports are exposed to the public internet to reduce your attack surface.
Verify if a "Customer can't connect" issue is due to a network firewall or server crash.