The Department of Homeland Security has ordered pipeline owners and operators to implement “urgently needed protections” against cyberattacks, in the second such directive since a crippling ransomware attack in May.

The Department of Homeland Security (DHS) issued its latest directive to pipeline owners and operators on Tuesday, more than two months after a ransomware attack shut down a critical gasoline and diesel pipeline carrying half the fuel supply of the entire US East Coast. The attack forced the line’s operator, Colonial Pipeline, to shut much of its network for several days, until a ransom was paid to the cybercriminals responsible.

The directive asks companies like Colonial Pipeline to “implement specific mitigation measures to protect against ransomware attacks,” to “develop and implement a cybersecurity contingency and recovery plan,” and to “conduct a cybersecurity architecture design review.” (RT)