ArdexaLinux has a firewall enabled by default that blocks all incoming connections.

The firewall in use is UFW (

To enable a specific port or service, e.g. SSH, run either of the following commands using the Remote Shell. You can use either the service name (if it is a common service such as SSH or HTTP) or the specific port and protocol. Both of these commands achieve the same result.

ufw enable ssh
ufw enable 22/tcp

To check the status of the firewall, run

ufw status

And to disable the service when you are finished

ufw delete allow ssh
ufw delete allow 22/tcp
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