Accessing network created by Internet Sharing

I would like to be able to access services on devices that are connected to my shared network.

Basically I have set up network sharing such that when I connect via Thunderbolt-Ethernet I share the connection over wifi. In order to do this my mac (I guess) creates some virtual network for devices to be be issued an IP address on. So what I would like to be able to do is to bridge (??) this network so that I can access the devices on it.

More specifically I would like to be able to access a service on a specific port that a device on the share's network is hosting.

Is this possible? And if so how?