Firewall/NAT

Hello,
Since a while I was accessing to my m0n0wall (Alix card + m0n0 1.3) across the internet public IP as it is install in a data centre far away.

Some weeks ago, I decided to activate the HTTPS function.

Since I did it, I can not access across the WAN (internet to the public IP addr).
I'm a bit lucky as I create a VPN a while ago . An I can today connected myself across the VPN I can access by the LAN IP addr interface.

So may be I did something wrong or something is not well configured somewhere.
Any suggestion ?
All help welcome.
Thanks to all.
Denis

Have you seen this?

http://doc.m0n0.ch/handbook/faq-webGUI-from-WAN.html

Thank you for the FAQ link.
So I understand than I had to add a port my self.
I did it today and reboot the firewall.
But I still can not access to it from the wan public address.
and now in my VPN access I just have to ad the port number I setup.
Anymore tricks or suggestion welcom.
Thanks
Denis