PlayStation Network users are experiencing issues connecting to the service because of the attack, according to GamesRadar, referencing tweets sent out by Sony.
Even though outages seemed to slow a bit earlier this morning, issues are arising once again.
The tweet was sent a few hours ago, and ad of press time, issues are still being reported per the PlayStation Network status page.
The Department of Homeland Security is on the case, per Reuters, and the list of sites and services having issues today, per DownDectector is rather long.