DNS-over-HTTPS (DoH) is not exactly a new technology, and it is something that is supported by all of the big-name browsers.
With the platform attracting a very security-minded groups of users, the only surprise here is that it has taken Google this long to bring DoH to Chrome for Linux. Once implemented, the change means that both DNS queries and DNS responses will be securely transmitted over HTTPS. But the Linux implementation is set to differ slightly from versions of the browser for other platforms.
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The reason it has taken longer for Chrome for Linux to benefit from DNS-over-HTTPS is that it makes use of Chrome's own built-in DNS client, and this is disabled by default on Linux. This has been the case for quite some time because of Chrome's failure to respect advanced Linux DNS configuration through nsswitch.conf, which is in turn because of the complexity and variety of Linux distributions.
The solution that the Chromium Project has come up with involves building support for the browser to read and parse DNS configuration that have been put in place. It also needs to be able to disable DNS-over-HTTPS on configurations that do not support it.
Safe as houses
In the design document, the team behind the project explains: " As Chrome's resolver does not support changing such mechanisms or their order, Chrome's support for respecting nsswitch.conf will be limited to detection of whether or not the configuration is a common configuration compatible with Chrome behavior". As a fallback, Chrome will not autoupgrade to DoH or use the built-in resolver unless a DoH server is explicitly selected via Chrome configuration settings.
At the moment it is not clear exactly when DoH support will arrive in the Linux version of Chrome, but it is thought to be version 91 or 92. This means that the feature should be available for testing in a matter of weeks, and will hopefully roll out on a wider basis soon after this.
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Sofia is a tech journalist who's been writing about software, hardware and the web for nearly 20 years – but still looks as youthful as ever! After years writing for magazines, her life moved online and remains fueled by technology, music and nature.
Having written for websites and magazines since 2000, producing a wide range of reviews, guides, tutorials, brochures, newsletters and more, she continues to write for diverse audiences, from computing newbies to advanced users and business clients. Always willing to try something new, she loves sharing new discoveries with others.
Sofia lives and breathes Windows, Android, iOS, macOS and just about anything with a power button, but her particular areas of interest include security, tweaking and privacy. Her other loves include walking, music, her two Malamutes and, of course, her wife and daughter.