CA API Developer Portal 4.0 can publish APIs on tenant API Gateways. The listen port number of the API Gateways may not be always "8443".
A port number "8443" is shown in the "Proxy URL" field on the "Proxy Configuration" tab in the "Add API" and "Edit API" pages.
Can we change the port number to a different number?
The port number cannot be edited. It is an example. API Proxy (API Gateway) can listen to incoming requests on multiple ports.
The port number "8443" should be considered as an example same as the port number in the Code Samples we can see with API Explorer.