[REBOL] How to do it in a safe way?

[petr . krenzelok]

Hi,

Is it possible in any way to limit incoming port connection to any
domain? E.g.


listen: open tcp://:8001

any possibility of how to check what domain/IP is connection comming
from? Or do I have to invent my own authentication mechanism/protocol?
Any possibility of such functionality in /Command version?

Thanks,

-pekr-