Blocking Ports 443 and 80 in Password Manager Pro

Blocking Ports 443 and 80 in Password Manager Pro

I would like to configure PMP to only be allowed to run on the server it is installed on. I do not want the remote web functionality. So I was thinking of blocking port 80 and 443. Will this break HA? Is there an easier way to lock it down so it can only be run from the server PMP is installed on? 
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