Port monitoring

Watch any server, not just websites

Databases, SSH, game servers and custom services don't have web pages, but they still go down. A port check tells you when they stop answering.

How it works

Set up in under a minute

Type the server's name or address and the port number, from 1 to 65535.

Every minute on Pro we try to open a connection and time how long it takes.

If it stops answering twice in a row, we tell you. When it's back, we say so.

Questions

Which ports can you check?

Any from 1 to 65535, apart from 25, which Cloudflare doesn't allow. For mail servers, use a mail server check, which also checks encryption.

Is it safe to open a port for checking?

Only check ports that are already meant to be reachable from the internet. If a database should be private, keep it that way.

Which plan is it on?

Pro. Each port counts as one of your 20.

More features

Your mail server answers and offers encryption, for sending and reading.

Backups and other jobs check in with us. If one stops, you'll know.

Every minute on Pro, with alerts only after two failed checks in a row.

Free for one website, live in under 60 seconds. We start watching the moment you add your URL.

Start free