Every service, on its own port
Not everything speaks HTTP. The port monitor opens a TCP connection to the host and port and checks that the service is listening and responds in time.
Included in every plan: 5 free monitors checked every 5 min, down to every 1 min on paid plans.
- Host
- mail.example.com
- Port
- 587 (Submission)
- Interval
- 120 s
- Timeout
- 15 s
How it works
Setting up a Port monitor takes less than a minute.
- 1
Choose host and port
Use a preset such as SMTP, IMAP, SSH or MySQL, or enter any port.
- 2
TCP connection
At every check we open a connection and measure how long it takes to establish.
- 3
Immediate alerts
Connection refused or timed out? The monitor goes DOWN and your contacts are notified.
Configuration options
Everything you can tune to fit the check to your service.
- Port presets
- HTTP, HTTPS, FTP, SMTP, SMTPS, Submission, POP3, IMAP, IMAPS, SSH, MySQL, PostgreSQL, Redis.
- Custom port
- Any port from 1 to 65535 for proprietary services.
- Timeout
- Set when a slow connection should be considered failed.
- Connection time
- Measure and keep a history of the TCP handshake time.
- Regions
- Check reachability from different networks.
- Maintenance
- Automatically mute alerts during scheduled work.
Use cases
Mail servers
Notice immediately if SMTP or IMAP stop responding.
Databases and caches
Verify that MySQL, PostgreSQL or Redis are reachable from where they should be.
Remote access
Make sure SSH or VPN services are available when you need them.
Start monitoring with Port
Create an account in under a minute and set up your first monitor. The Free plan stays free forever.
No credit card required.