I have a ClarkConnect-server running behind an Endian firewall.

ClarkConnect is accessible at https://ip_address:81

Now I want to port-forward on my firewall to the ClarkConnect-server to access its webGIU on port 81 from internet.

I have a rule that an incoming request on port 81 on Endian needs to be forwarded to the internal IP-address of ClarkConnect on port 81.
This does not work. Firefox says that the server takes to long to respond.

When I choose another incoming port on the firewall, like port 85, and I forward every incoming request to port 81 on the ClarkConnect-server, it does not work either.

So : how can I portforward to https://private_ip:81 ??

What I want is https://my_dyndns.info:81 and be able to have my ClarkConnect-GUI. Is it possible ?

If you have a router, make sure the port is forwarded on the router also

There is no router. My firewall also plays the role of NAT-router (DHCP) so basically I just need to forward the port on my firewall to the internal client.

Still... from elsewhere on the internet I cannot get to my server with this portforwarding.

I have tried a port > 1024 like https://my_dyndns.info:11111 and forward that to internal_ip:81 but no luck.

Is this because secure http is involved ??

what happens if you use http?
For https you need to open port 443