Explore documentation
  1. Welcome to Uptime 👋
  2. Frequently Asked Questions
  3. Monitoring
    1. Get started with monitoring
    2. Working with monitors
    3. Customizing monitors
    4. Monitor types
      1. Uptime monitor
      2. Keyword monitor
      3. Ping monitor
      4. Cron and heartbeat monitor
      5. Playwright monitor
      6. API monitor
      7. DNS monitor
      8. Domain expiration monitor
      9. SSL certificate monitor
      10. TCP/UDP port monitor
  4. On-call scheduling and alerting
    1. Get started with on-call
    2. Sending alerts to Slack ↗
    3. Connecting external calendars
    4. Advanced on-call setup
  5. Incidents
    1. Working with incidents
    2. Create incidents manually
    3. Post mortems
    4. Incident silencing
    5. Incident metadata
  6. Status pages
    1. Get started with status pages
    2. Working with status pages
  7. Integrations
    1. Integrating with Better Stack
  8. Team and account management
    1. Team management
    2. Account settings
    3. Audit logs
  9. API
    1. Get started with API
  10. Monitors API
    1. Monitors
    2. Monitor groups
    3. Heartbeats
    4. Heartbeat groups
  11. On-call & Incidents API
    1. On-call calendar
    2. Escalation policies
    3. Severities
    4. Incidents
    5. Comments
  12. Integrations API
    1. New Relic Integrations
    2. Datadog Integrations
    3. AWS CloudWatch Integrations
    4. Azure Integrations
    5. Google Monitoring Integrations
    6. Grafana Integrations
    7. Prometheus Integrations
    8. Email integrations
    9. Incoming webhooks
    10. Splunk On-Call integrations
    11. PagerDuty Integrations
  13. Status pages API
    1. Status pages
    2. Status page sections
    3. Status page resources
    4. Status page reports
    5. Status page report updates
  14. Other API
    1. Metadata

TCP/UDP port monitor

Creating a TCP/UDP (including SMTP, POP3 or IMAP) monitor:

  • Go to Monitors → Create monitor.
  • Change the Alert us when the host above selection to "Doesn't respond at a TCP port" (or your desired port type).
  • Enter your port number in the TCP Port field.
  • Click Create monitor.

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SSL certificate monitor

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