The official status page for PSN says that the network is online. However, they also warn that the service has "intermittent connectivity."
"Some latency may be experienced due to high volume. Should you continue to experience problems after PSN services are fully restored please refer to Contact Support."
Sony said today that PS4 owners who are unable to connect could fix the issue by changing their MTU settings. A tweet from a few hours ago said this might be unnecessary due to a fix on their end. However, if you're having problems, you may as well give the MTU fix a shot. It's not particularly hard:
Read More