xdr was developed by sun, i don't think that is the issue here. I think it is the service that rpc doesn't recognize. i'm assuming in this case it is rails under ruby or something using ssh or ssl that require secure and non-blocking calls to low order operations.

The issue is in the handling of the connection. This is the issue i'm having right now with [the] wrapping [of] secure binary streams of [un]trusted data with authentic transport control.

eg tls 1_2 over ssl