Yes. You need to get an IP stack first. I'm using the Genesis one that comes on the OS3.9 CD. Miami is hard to come by because you can't get codes for it anymore. I would recommend you throw a CD drive in there soon, my life was hell with this 4000 until I did.

Once you decide on the stack, you need to get it installed first, then you have to install the Xsurf software. My install didn't go well, and I had to help it by editing the StartEthernet script to correct the paths that the installer made. It's not pretty to setup, but it is most fun. I'm running OS3.9 and believe me that was a project from WB 3.0.