--- title: TCP Port Monitoring for Databases & Services description: Professional TCP port monitoring service by WatchFor. Monitor databases, mail servers, SSH, FTP, and custom TCP services 24/7. Track port availability, connection health, and get instant alerts. Free plan available. canonical: https://watchfor.io/tcp-monitoring --- # TCP Port Monitoring & Connection Health Monitor TCP ports, database servers, mail services, and backend infrastructure 24/7. Verify connection health, track availability, and get instant alerts when ports become unreachable or services fail. [Get started for free](/auth/sign-up)[View pricing](/pricing) ## Comprehensive TCP Monitoring Features Everything you need to monitor TCP services and infrastructure ### Port Availability Monitor TCP port availability and connection health. Track open/closed ports and detect unauthorized port changes instantly. ### Fast Detection Get alerts within seconds when TCP ports become unreachable or connections fail. Minimize service disruptions with rapid detection. ### Connection Validation Validate TCP connections and handshakes. Ensure services are accepting connections and responding correctly to requests. ### Service Monitoring Monitor databases, mail servers, FTP, SSH, and custom TCP services. Verify backend infrastructure is accessible and healthy. ### Performance Metrics Track connection times, handshake latency, and response delays. Identify network issues and optimize service performance. ### Smart Alerting Configure intelligent alerts for port failures, timeout issues, and connection problems. Get notified via multiple channels. ### Multi-Location Checks Test TCP connectivity from multiple global locations. Identify regional network issues and firewall misconfigurations. ### Historical Analysis Access detailed connection history and availability reports. Track uptime trends and identify recurring connectivity patterns. ## Why Choose Our TCP Monitoring Solution? Our TCP monitoring service provides enterprise-grade reliability for your critical infrastructure. With continuous port monitoring, global connectivity checks, and intelligent alerting, you can ensure databases, mail servers, and backend services remain accessible and healthy around the clock. [Start monitoring now](/auth/sign-up) Monitor unlimited TCP ports and services Track databases, mail servers, and custom services Validate connection establishment and handshakes Monitor from multiple global locations Track connection times and latency Detect firewall and network issues Detailed historical connection logs Instant alerts via email, Slack, Discord, and webhooks ## How TCP Monitoring Works Simple setup, reliable monitoring 1 ### Add Your Service Enter the hostname or IP address and TCP port number of your service. Configure check intervals and timeout thresholds. 2 ### Configure Validation Set connection timeout limits, retry policies, and alert thresholds. Choose monitoring locations and notification preferences. 3 ### Monitor Continuously Our global network continuously attempts TCP connections to your ports, validates handshakes, and tracks connection health metrics. 4 ### Get Instant Alerts Receive immediate notifications when ports become unreachable, connections fail, or timeouts occur. Track all incidents with detailed logs. ## TCP Monitoring Use Cases Essential for any TCP-based infrastructure and services ### Database Monitoring Monitor PostgreSQL, MySQL, MongoDB, Redis, and other database servers. Ensure database ports are accessible and accepting connections. Detect database outages, network issues, and connection pool problems before they impact your applications. ### Mail Server Monitoring Monitor SMTP, IMAP, and POP3 ports to ensure email services remain online. Track mail server availability and connection health. Critical for businesses relying on email infrastructure and preventing email delivery disruptions. ### Backend Services Monitor custom TCP services, microservices, and internal APIs. Verify that backend infrastructure is accessible from your application servers. Essential for maintaining service reliability in distributed architectures. ### Infrastructure Monitoring Monitor SSH, FTP, SFTP, and other infrastructure services. Ensure remote access remains available and track connection health. Perfect for DevOps teams managing servers and network infrastructure. ## Frequently Asked Questions Everything you need to know about TCP monitoring What is TCP monitoring? TCP monitoring is a service that continuously checks the availability and health of TCP ports and services. It establishes connections to specified TCP ports, validates the handshake, measures connection times, and alerts you if ports become unreachable or connections fail. This ensures your TCP-based services like databases, mail servers, and custom applications remain accessible. How does TCP port monitoring work? What services can I monitor with TCP monitoring? How often are TCP checks performed? What happens when a TCP port becomes unreachable? Can TCP monitoring detect firewall issues? What is the difference between TCP and HTTP monitoring? Can I monitor custom TCP ports? How do you handle services behind firewalls? What metrics are tracked for TCP monitoring? ## From our blog Guides, deep-dives, and best practices from the WatchFor team [Networking ### What is a Network Port? (and how to monitor one) Feb 14, 2026·3 min readRead article](/blog/what-is-a-network-port)[Networking ### ERR_CONNECTION_REFUSED: what it means and how to fix it Feb 22, 2026·3 min readRead article](/blog/connection-refused)[Networking ### TCP vs UDP: the difference, explained simply Apr 04, 2026·3 min readRead article](/blog/tcp-vs-udp) ## Ready to Start Monitoring Your TCP Services? Keep databases, mail servers and critical infrastructure under watch with external TCP checks. Get started in minutes with the free plan — no credit card required. [Get started for free](/auth/sign-up)[View documentation](/docs/monitors/network#tcp) --- Canonical page: https://watchfor.io/tcp-monitoring · Site guide: https://watchfor.io/llms.txt