Hello trook,
Unfortunately there is no telnet or ssh servers running in the box so using it this way is not a possibility. We do have a linux version of the ENET driver that would probably suit your embedded system needs. There is no other way to communicate with the ENET/100 box directly.
Hope this helps out. Let me know if there is anything else I can do for you.
Best Regards,
Aaron K.
Application Engineer
National Instruments