From what I've found, the following appears to reflect how NAT rating affects your multiplayer capabilities:
- OPEN - Can play & voice chat with anyone.
- MODERATE - May be unable to play or voice chat with STRICT.
- STRICT - Can only play & voice chat with OPEN.
However, this does not give me a whole lot of clarity as to what exactly these ratings mean as a reflection on my home network or internet connection, nor what I can do to get my system into an OPEN status.
What conditions might make a system show as MODERATE or STRICT? How can I get my system from MODERATE or STRICT to OPEN, without drastically changing my home network?