If you are wanting The tinycore Terminal Server/"Boot Server" to also pass traffic back and forth to the external "Internet" for all the clients connected to your hub, then you'll probably want to look at the dnsmasq.tcz extension. That's assuming you don't already have it installed on the server
If you do already have it, and need help setting it up you might have to wait for one of the "pros" to reply because I have not tried it yet in tinycore.