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What ports and IP addresses do my clients use to communicate with the server?

Client/Server communication is effected using the following ports.
Please ensure you configure your network to allow *.avast.com and you should not encounter any issues.

- http/80 (updates)
- https/443 (FFL encryption key negotiation)
- TCP, UDP/ 443, 53 for secure DNS
- *.avast.com

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    Chris Hadwin

    What if you have a webfilter and cant use a global allow http/80 or https/443?

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