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Firewall Requirements
This Article Applies to:
- Essential/Premium/Ultimate Business Security
- Small Office Protection
For overall functionality, and to enable the Antivirus clients to authenticate/update, you must allow certain ports and URL addresses through your Firewall or Proxy Server.
Geoblocking
Avast web services are hosted in many countries around the world. Therefore, we do not recommend geoblocking in your firewall settings.
If geoblocking is necessary, we recommend you set URL Allow rules to supercede geoblocking, so Avast traffic can still be allowed.
Ports (TCP & UDP)
- 53 – Secure DNS services (only if using Real Site component)
- 80 – Internet Vulnerability Checks and Feature Updates
- 443 – Encrypted communication (only if using Real Site component)
URLs
- *.avast.com
- *.avcdn.net
Other Articles In This Section:
Disabling Windows Defender for Windows Server 2016 and 2019
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