Help with Port Forwarding, Please?

[r0b0ty]

Hi, guys.  I've been at this for hours and just can't figure it out.  What's worse is that I don't know if it's an opnSense issue or other.  I hope you can help.

My setup:

• opnSense running on a computer with a 4-port NIC
• TrueNAS box connected to the LAN interface w/ IP address 192.xxx.xxx.10, assigned by opnSense
• Nextcloud plugin installed in TrueNAS w/ IP address 192.xxx.xxx.11, also assigned by opnSense
• opnSense Dynamic DNS is set up to use DuckDNS, routing xolocrafts.duckdns.org to my public IP address

Basically, when I try to connect to 192.xxx.xxx.11 via the xolocrafts.duckdns.org host name, I get this:



I set up the NAT Forwarding this way:



I assume that I can NAT Forward from WAN to LAN, but if this is incorrect, then it's part of the problem.  I have tried to temporarily stop the Web Proxy, but I get a similar error: "Hmm. We're having trouble finding that site.  We can't connect to the server at xolocrafts.duckdns.org."

Note that I used external Port 1080... that was just to see if there was any difference in results, since I initially used Port 80.

It seems that the Dynamic DNS setting is correct, since it IS routing it to the correct public IP address.  From there, I don't know what is happening.

I haven't even set up SSL for this (my next step), but can't even get it working without it.  Now..., if I simply type "http://192.xxx.xxx.11 in my browser, while connected to the LAN interface, everything works fine.

Do you see what I'm doing wrong?

Thanks for your help!