The persistent threat of Blizzard DDoS attacks demands an “always-on” cyber defense posture. These attacks which utilize vast, low-cost botnets to cripple the Battle.net platform and disrupt games like World of Warcraft, Overwatch 2, and Diablo IV have become a constant, sophisticated challenge.
https://fpsiogames.com/post/blizzard-confirms-ddos-attack-on-battle-net-players-face-connection-issues