Question:

My office (or other) network blocks outbound traffic on port 8443, so I can't get to the plesk control panel from my office network.  Is there an alternate method to access the control panel over standard

Answer:

Yes, please see the following table which lists which control panels have an alternate access URL on https TCP 443, which should be allowed by any network environment which allows standard WEB internet access:

Alternate Control Panel URLs

Server	Control Panel URL (on 8443)	Alternate access URL (on 443)
web30	https://web30.3essentials.com:8443	https://web30plesk.3essentials.com
web28	https://web28.3essentials.com:8443	https://web28plesk.3essentials.com
web26	https://web26.3essentials.com:8443	https://web26plesk.3essentials.com