Port Monitor
Monitor TCP port availability for any service running on your infrastructure.
What is Port Monitoring?
Port monitoring checks if a specific TCP port is open and accepting connections on a remote host. It's ideal for monitoring services that don't speak HTTP, such as databases, mail servers, or custom TCP services.
Technical Details
The monitor attempts to establish a TCP connection to the specified host and port. A successful connection indicates the service is running and accepting connections. Connection timeouts or refusals trigger alerts.
TCP Connection Check
Verify ports are open and accepting TCP connections
Fast Detection
Detect service outages within seconds of occurrence
Multiple Ports
Monitor multiple ports on the same host with separate monitors
Security Auditing
Verify only expected ports are open for security compliance
Database Servers
Monitor MySQL (3306), PostgreSQL (5432), Redis (6379), and MongoDB (27017) availability.
Mail Servers
Check SMTP (25/587), IMAP (143/993), and POP3 (110/995) port availability.
Game Servers
Monitor game server ports to ensure players can connect.
| Option | Type | Required | Default | Description |
|---|---|---|---|---|
host | string | Required | - | IP address or hostname to check |
port | number | Required | 80 | TCP port number to monitor (1-65535) |
Best Practice
Monitor critical service ports alongside application-level checks. A port being open doesn't guarantee the service is working correctly.
Start Monitoring Today
This monitor is included in our free tier. Get started in seconds.