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Akamai is a huge company with over 250,000 servers. It provides downloading and update services for Microsoft, Mozilla, Adobe, and many more companies.
In Avast Network Connections it is allowed a connection to the programs it updates on the normal service ports. So why is it scanning client ports?
Could this be the reason?
What is the Akamai NetSession Interface?
The Akamai NetSession Interface is a secure application that may be installed on your computer to improve the speed, reliability, and efficiency for downloads and streams from the Internet. It is used by many software and media publishers to deliver files or streams to you.
If the software or media publisher uses the feature and if you enable it, NetSession can also use a small amount of your upload bandwidth to enable other users of the NetSession Interface to download pieces of the publisher’s content from your computer.
http://www.akamai.com/html/solutions/client_faq.html
I don’t have Net Session on my computer, or if I do, I can’t find it.
I will bet that millions of other users do have it installed, and probably don’t know Akamai is using their computers for storage, and downloading to other computers. It does this during idle time on the computer, so maybe that is why people are reporting high CPU usage during idle time.