There are 4 ports open which to my best effort on several occasions simply refuse to shut. Those ports being 22, 53, 80, 427, and 8200. I will probably request a new static IP if possible tomorrow to see if this resolves the issue, but otherwise I do believe this is most likely an issue with backhaul, possibly even the DSLAM I am connected to. I don't think an average internet user would notice these issues, as it is only affecting UDP and is not affecting things like audio and video streaming, so it is definitely a possibility.