im building it right now.

tcpip can be a nightmare to debug without a little help - if networking or routing is in there.
also of the two types of connections with tcpip ports - tcp and udp- tcp is a lot more hassle as the connection has to stay open the whole time.
With udp ( which is like artnet ) - its a bit easier.

The equinox boxes you are using right now - only seem to support tcp connections.
I think the moxa boxes support both.