Major Australian Ports Reopen After Cyberattack Halts Operations

SYDNEY—Some of Australia’s biggest ports restarted operations on Monday following a cyberattack that disrupted container traffic ahead of Christmas and highlighted vulnerabilities in the nation’s critical infrastructure.

Dubai-based DP World shut down its terminals in Sydney, Melbourne, Brisbane and Fremantle after detecting suspicious activity on its systems on Friday. Operations at the four terminals, which handle almost 40% of goods in and out of the country, resumed on Monday morning after it successfully tested key systems.