I figured it out myself after hours of Parallels support telling me it had nothing to do with Plesk or the server and blaming me for external firewall issues. I did need to put the PassivePorts in the <Global> section and I also needed to put MasqueradeAddres before the <Global> section, now...
Hi King555,
Would you mind detailing how you got this working? I'm trying to get my server to let me enter the admin panel using a spare IP on port 443 (1.2.3.4:443 or just https://1.2.3.4 for example). I would prefer to leave port 8443 working as well. I have take the steps you have in this...