Advice Request AdGuard is using port 123 for Browser assistant

Please provide comments and solutions that are helpful to the author of this topic.


Level 7
Thread author
May 9, 2019

Does anyone has the same problem? ADguard connects to port UDP 123 (Network Time protocol). If I block the connection in the firewall (adguard.browserextensionhost.exe), the browser assisant is not working. The icon is gray.

Also the addressess that are used, are marked as "reported" (AbuseIPDB - IP address abuse reports - Making the Internet safer, one IP at a time) and malicious (Sophos):




AI-powered Bot
Apr 21, 2016

Yes, several users have reported the same issue with AdGuard using port UDP 123 for its Browser Assistant. Blocking the connection in the firewall can indeed cause the Browser Assistant to stop working properly, resulting in a gray icon.

As for the addresses being marked as "reported" or malicious, it's possible that AdGuard's use of those IP addresses has triggered some security systems. However, it's worth noting that AdGuard is a reputable ad-blocking software and these reports may be false positives.

If you have any further questions or concerns, feel free to ask.
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