Monitor TCP/UDP ports for databases, mail servers, SSH, and more. Verify service availability from 50+ global locations.
Monitor any TCP or UDP service with comprehensive checks
Monitor any TCP port for connection availability. Verify that services accept connections and respond correctly.
Measure TCP handshake time to understand service responsiveness. Track connection latency trends over time.
Monitor standard ports (22, 80, 443, 3306) or any custom port your application uses. No restrictions on port numbers.
Not just port open checks—verify services respond with expected banners or protocols for deeper validation.
Test port accessibility from 50+ worldwide locations. Ensure services are reachable for all your users.
Get notified immediately when ports become unreachable. Email, Slack, and PagerDuty integrations available.
Common services and ports we help you monitor
Simple setup for comprehensive service monitoring
Provide the hostname or IP address and the port number you want to monitor.
Choose monitoring locations based on where your users need to access the service.
Set up notification preferences and timeout thresholds for your service.
We continuously check port availability and alert you the moment issues arise.
Detect when services like databases, mail servers, or application backends stop responding.
Ensure your firewall rules aren't blocking legitimate traffic. Verify port accessibility from different regions.
Many critical services don't use HTTP. Monitor databases, queues, game servers, and custom applications.
Monitor the building blocks of your infrastructure, not just the end-user-facing websites.
Common questions about port monitoring
TCP monitoring establishes a full connection handshake, confirming the service is accepting connections. UDP monitoring sends packets and checks for responses, which is useful for services like DNS (port 53) or game servers that use UDP.
We monitor from external probe locations, so ports must be accessible from the internet. If your service is behind a firewall, you'll need to whitelist our probe IP addresses, which we provide for each monitoring location.
With 1-minute check intervals, port failures are typically detected within 60-120 seconds. We verify from multiple locations to avoid false positives, then send alerts immediately upon confirmed failure.
Default timeout is 10 seconds for TCP connections. You can customize this value based on your service's expected response time. Connections that exceed the timeout are marked as failed.
Port monitoring confirms that the service accepts connections. For deeper validation (like database queries or API responses), you should combine port monitoring with HTTP/API monitoring for the specific service endpoints.
Monitor databases, mail servers, SSH, and any TCP/UDP service from 50+ global locations. Know instantly when services go down.