This is a very common tunnel I use almost daily to access a servers docker daemon if this functionality could be added to Core Tunnel would be awesome!!
ssh -NTL 127.0.0.1:2375:/var/run/docker.sock core@host
Very clear and reasonable feature, you will see it in next update
Unix domain socket forwarding support was added in Core Tunnel version 1.3.3:
And I wrote a simple guide for this feature:
Feel free to comment if you have any questions about it.