BruteProtect Firewall Rules

I’ve recently discovered your plugin, and it seems like a wonderful security tool. The problem I am having is with my machines in my DMZ. I have two development servers which do not have many restrictions on the network, but my Production DMZ servers fail to retrieve an API key when I attempt to configure the plugin. It appears to timeout while trying to register.

Can you please let me know what firewall rules are needed to properly run the plugin?

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