• Debian 11 is approaching its end-of-life (vendor EOL date - August 31, 2026). Plesk Obsidian 18.0.80 will be the last release to support it.
    If you are running Plesk Obsidian on Debian 11, we recommend you upgrade those servers to Debian 12 using our dist-upgrade tool.
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Resolved Plesk Firewall [Do I have to open all ports when switching from another firewall to Plesk Firewall?]

With the Plesk firewall, you can block a bunch of countries using the ISO 3166 country codes , all ports (incoming) and place the deny rule at the top.

This way, you will block incoming traffic for the websites and email.
I have:

Plesk Obsidian
Versión 18.0.44
Debian 9.12

And firewall doesn’t allow to put ISO 3166 country codes for doing blockings. Just port ranges or nets.

Another workaround?
Thanks
 

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Also update the extension. In the latest Plesk the Plesk Firewall is not a component, it is an extension, and you'll need the latest version of it.
 
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