Australia: Ports blocked for days after cyber attack, tens of thousands of containers jammed. Security experts have long considered Australia to be a lucrative target for hackers. Now a new incident is causing a stir there: Due to an online attack, nothing worked at four ports for days. Three days after the start of a cyberattack, several major ports in Australia are gradually resuming operations. The container terminals in Sydney, Melbourne, Brisbane and Fremantle are back in operation, port operator DP World said on Monday.