How to set up bindings in webconfig to enable streaming in RESTful WCF service

Question

I have a RESTful service which I'm trying to enable to accept a PDF file. I'm using a stream to transport it, but I keep running into mysterious errors in the process.

My first error is this: Security negotiation failed because the remote party did not send back a reply in a timely manner. This may be because the underlying transport connection was aborted.

Not sure what's causing that. Also, I tried adding a customBinding in an attempt to fix this error, and I get an error that says I don't have my binding set up properly.

My main, overall question is this: Does anyone know of a simple binding and complete instructions for how to set it up to enable streaming?