In short, neither opnsense nor port forwarding are "broken".
You seem to be a bit confused about how SSL actually works however. :)
What cert do you see connecting from outside to https://domain.space and what cert do you receive when connecting from inside to https://server_IP ?
Also, you can safely remove the OPNSense WEBGUI cert from that server, it's utterly irrelevant to the whole setup.
You seem to be a bit confused about how SSL actually works however. :)
What cert do you see connecting from outside to https://domain.space and what cert do you receive when connecting from inside to https://server_IP ?
Also, you can safely remove the OPNSense WEBGUI cert from that server, it's utterly irrelevant to the whole setup.
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