Route specific port traffic to specific IP address
Solution 1:
You're compromising your zoning concept.
The DMZ should be the only zone where external traffic terminates. If you forward external traffic into your LAN zone, you are bypassing the DMZ and potentially expose your entire network. Consider using a VPN tunnel if possible.
Technically, it should be no problem to forward port 443 into your LAN, but you haven't told us anything about your network (topology, firewalls, address schemes).