Feature Requests Negative TCP check (alert if port is open)
Completed
The idea is to add an option to create an alert if a port is opened (and not closed as usual).
The goal is to detect firewall misconfiguration.
For example, monitor the port SSH 22.
If the port is accessible, trigger an alert.
Adrien
Created on January 08, 2024 · Last update on August 20, 2026
5 Comments
Thanks for this suggestion, this is something I was thinking about too and which has been requested a couple time. It's currently low priority but likely to be added later.
This is now possible: https://updown.io/faq/can-i-monitor-an-open-or-closed-port
Awesome! I rolled my own server to do this, using nagios, will migrate that into my updown account! Thanks for this
Great, let me know how it goes :)
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