As of DNSthingy build 1916 and above, this behaviour is now the default. Then, and only then, according to GRC DNS benchmark freeware, do you pass the test of private IPs being stripped from public DNS queries. The green circle is what you’re looking for on your local DNS server on your LAN. Watch for news on how DNS over TLS and DNS over HTTPS have a future on-premise to provide the best of security and privacy, while also facilitating system administrators’ responsibility to provide security at the gateway. It is clear that DNS-based filtering is here to stay.
Better IoT security control and connectivity.Better compatibility – no more worries about end-user applications’ proxy incompatibilities.Faster end-user experience (for the time it takes for a DNS query the end-user knows if destination is blocked or allowed).Lower RAM and storage resources required on gateway such as pfSense (only a DNS query response vs packet inspection, caching of page contents, etc).In fact, DNS-based filtering has a significant advantage over proxy-based technology for these reasons: On the other hand, the good news is that DNS-based filtering remains as powerful as ever. Transparent filtering, as it is called, is in use by Squid and many other SSL filtering gateways. However, the side effect of this natural progression of encryption, is that gateways which depend on SNI for Internet Filtering cannot do so any longer when Encrypted SNI is deployed. It makes sure that along the path from your browser, all the way to the host you’re contacting, even the hostname such as isn’t visible. Encrypted SNI, announced by Cloudflare this past week, is a positive move towards privacy and security.
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