Colonial Pipeline’s Computer Network Temporarily Goes Dark

Colonial Pipeline, the crucial U.S. pipeline that’s been trying to recover from a debilitating criminal hack, restored a vital communications system that failed and temporarily left customers in the dark about fuel shipments.

The computer system that allows oil refiners and other clients to reserve space and monitor the status of fuel traveling through the pipeline was back online after an outage earlier Tuesday, Colonial said in an email.

Fuel shipments weren’t interrupted but the company sought to calm any concerns the outage might presage another disaster like the shutdown earlier this month that crippled gasoline and diesel deliveries ...