I have definitely noticed that my port, DNS, and NAT settings reset every time I shut off my Playstation. If i just turn it on and play it won't work but if I go to my router, forward my ports (while the Playstation is on and set with a static IP), and then reconnect to the network with my Playstation (using the DNS I have saved etc.) It works no problem until I shut it off again. I'm not sure if this is a fault on my router's part or the Playstation, but it seems to be the only thing that consistantly works. A bit of hassle as it takes 30 seconds- 1 minute to do but it's well worth it. I suspect this error is directly related to high latency (a high ping) and less to do with the bandwidth of the connection. I also think that our routers may be the culprit here. Anybody who is having this issue still, please share the brand, model, and tell if the connection is wired or wireless. Might help us figure out the root of the problem!