Assuming the cnet.device will talk to an EN2226 (depends how similar it is to the EN2216) - I guess your next step would be to install a TCP/IP stack and see if you can assign an IP address to it.
Personally I'd go with AmiTCP although the installer can be a little buggy. Others would recommend Miami, AmiKit's 'EasyNet' (which I think does wired as well as wireless?) or Roadshow.
