The software comes with an advanced firew. Unfortunately, it is fairly straightforward for the tracker to circumvent such a fixed rule-based measure, e.g. Adguard 6K CNameClaburn TheRegister is a powerful Internet security solution that provides users with a comprehensive range of features and options to keep their online activities safe from potential threats. This is because the requests to the trackers matched an entry of the blocklist with a URL pattern that did not consider the hostname. uBlock Origin for Chrome, which does not have an explicit defense for CNAME-based tracking, still manages to block several trackers. AdGuard names 6,000+ web trackers that use CNAME chicanery: Feel free to feed them into your browsers filter. As such, at the time of this writing, it is technically impossible for these extensions to block requests to trackers that leverage CNAME records to avoid detection. I tested it on Firefox (with uBlock Origin) and MS Edge (with AdGuard) & I didnt get a. Although uBlock Origin also has a version for Chromium-based browsers, the same defense cannot be applied because Chromium-based browser extensions do not have access to an API to perform DNS queries. Subsequently, the extension checks whether the domain name matches any of the rules in its blocklists, and blocks requests with matching domains while adding the outcome to a local cache. The extension blocks requests to CNAME trackers by resolving the domain names using the API method to obtain the last CNAME record (if any) before each request is sent. In response to a report that a tracker was using CNAMEs to circumvent privacy blocklists, uBlock Origin released an update for its Firefox version that thwarts CNAME cloaking.
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