(Reuters) – Websites for dozens of financial institutions and airlines in Australia and the United States were briefly down on Thursday, in the second major blackout in just over a week caused by a failure in an important part of the Internet infrastructure.  Server-related issues with the content delivery provider Akamai had hampered the services of Australian banks, while many US airlines, including American Airlines and Southwest Airlines, also reported one-hour outages.
The fault is related to technical problems at Akamai. follows an outage at rival Fastly Inc. which affected a number of popular websites last week.
The affected platform is up and running, a spokesman for Akamai said, adding that the company "continues to validate services."
The outage was caused by a bug in Akamai's software that has since been fixed and not caused by a cyberattack or vulnerability, the spokesman added.
Akamai is one of the largest professional users of CDN services, used by companies to accelerate the delivery of data-heavy content, videos and games to websites.
Several US sites affected by the outage returned on Thursday.
"Our website and other Internet-based tools are up and running today after a brief hiatus late Wednesday night, a Southwestern spokesman said in a statement.
“We continue to investigate the root cause of yesterday's outage, but it is believed to be related to the great Akamai outage.
American Airlines, United Airlines and Delta Air Lines were not immediately available for comment.
In Australia, the websites of the Central Bank, Commonwealth Bank of Australia, Westpac Banking Corp. and Australia and New Zealand Banking Group had started coming back online late in the afternoon.
Virgin Australia said it was "one of many organizations experiencing an outage with the Akamai content delivery system", although the situation was
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