Web admin, different ports for WAN and LAN

I miss this feature on Peplink which I guess it is easy to implement: different ports for LAN and WAN access to the web interface. It is nice to have default ports like 80 and 443 on LAN for easy access, but different ports (like 8443) on WAN for increased security and/or because most ISPs blocks ports 80 and 443.

This is supported. Please find the screenshot below.

I mean I want to use different ports for LAN and WAN. For instance: 80 and 443 on LAN and 8081 and 8443 on WAN.