[Twisted-Python] Perspective broker and pipes

Hello, I wrote a pb application which also uses udp sockets. It works nicely. Now there's the situation where client and server are both located on the same machine. This means I could just connect to localhost and everything works. Unfortunately some firewalls warn about connections. I want to avoid this. So I thought about replacing the transports in pb with pipes instead of sockets if the server and client are both on the same machine. I'd have to do the same for my custom udp solution. Doing it for my custom udp code is easy, but how do I do this with pb? Do I just have to create some kind of reactor.createPipe() thing or is there more to it? Thanks for your help, -Matthias