SimpleRPCServer

[Skip Montanaro]

    Esben> What i don't know is how to the client ip. I would think I should
    Esben> override the _marshalled_dispatch method but I can't quite grasp
    Esben> it all.

First, from my reading of SimpleXMLRPCServer, I don't think _dispatch()
belongs at that level.  It belongs in the request handler class or in a
separate dispatcher class, depending on what version of Python you're using.
Second, SimpleXMLRPCServer is a SocketServer subclass.  You should be able
to provide a verify_request method (see the SocketServer docs) and a handler
class with a set_local method:

    class RPCServer(SimpleXMLRPCServer):
         def verify_request(self, handler, address):
             handler.set_local(address_is_local(address))

A _dispatch method in the handler will then be able to check an attribute to
know if the request was made from the local machine or not.

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