Forwarding problems...

Hi there,
unfortunately I am very new to the Winbox software and there are a few questions I couldn’t find an answear for yet.
I have a hotspot with winbox software and it runs behind my router.
(http://mymojito.net/public/network_hotspot.gif demonstrates my structure…)
The Hotspot and every device behind the winbox router works fine, but I can’t let through any specific port…
My first router (192.168.0.1) is connected to the winbox router (172.28.64.1). Devices behind the winbox router retrieve IPs like 172…
So… if a port request occurs from the internet, I think I have to forward it (r.g. port 5900 for vnc-service) from my 192.168.0.1 router to 172.28.64.1 (winbox) first. and in the winbox console I have to forward the port to my computer with the 5900 port service running.
But I cannot realize that…
Can someone help me? That would be wonderful…

Best regards,
Mario

It is possible to use alternative HotSpot login method, for example MAC-address, when host is authenticated as soon as MAC-address is being reachable from the router.

Or you can setup HotSpot that 5900 port is reachable without HotSpot authentication by walled-garden ip.

Of course you need dst-nat rule to forward VNC traffic from public addresses to local address [computer].

Thank you, I will try something in this direction