I get the point around certbot but PA could implement their own code that supports the ACME protocol for issuing certs.
Digicert now supports this directly to their API and others are adding it, I don't see that requiring a off-box solution is really needed. While I can see that it works and is a solution having the product take care of it's own security would be helpful especially to smaller deployments.
Forgive me if I'm missing something, but wouldn't supporting ACME protocol natively on the firewall require that the firewall management IP be accessible from the internet with a port open to validate the cert request? This seems like it would increase the attack surface. Please correct me if I'm wrong.
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