Because it is being implement using DNS, there are no additional settings needed on the devices. If you are running IPFire in a school, you can now filter adult content, violent, criminal and other websites that are not suitable for children or teenagers from the search results. That way, the request itself no longer has to be modified.Īt the time of writing, those websites are the only ones that I am aware of that support it. So when a request is being sent to, it would instead be sent to a different server that already knows that it is responsible for Safe Search. That is why DNS has now a new responsibility: Divert those DNS requests to servers that only serve the filtered content. Since everyone is using HTTPS now, we no longer can intercept that HTTP request and change it without breaking the encryption. When a HTTP request was being sent to the search engine, the IPFire proxy would have added a flag that tells the search engine to filter adult and violent content. What hasn't been foreseen in those times was that the whole Internet will be using HTTPS. Those applications have all not been foreseen by the designers of the Internet, but additions like DNSSEC allow us to use DNS in a more flexible way. Without DNS we would not find the servers that serve us the websites that we want, emails won't reach the right server and we now even use it to distribute key material with DANE. It has been changed and updated many times and many applications are now relying on it that didn't in the first place. Although it is one of the oldest protocols that is still used on the Internet, DNS is far from "old".
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