![]() ![]() sudo apt update sudo apt install unbound While this installation is working, the Unbound service is not able to start yet because the UDP/TCP port 53 is already used by Pi-hole. The following installation procedure is covered on the Pi-hole site as well. This is also a slight disadvantage due to the additional traffic overhead of the HTTPS headers, which makes DoH somewhat slower than DoT. The recursive DNS server of choice is Unbound. DoH has the advantage of being harder to block or detect, because the DNS traffic is encapsulated inside of HTTPS traffic destined for port 443. I chose DoT because the cloudflared program would not work on my Raspberry Pi 1 Model B+. You are still trusting the upstream DNS server- in our case, Quad9 and Cloudflare- to provide the correct responses.Īnother option to secure DNS traffic is DNS-over-HTTPS. DoT somewhat protects integrity by preventing intermediaries from manipulating your DNS requests or their responses. The name of the websites that you visit will still be visible in the SNI of your HTTPS traffic, allowing your ISP (and any other intermediary) No matter how you protect your DNS traffic, … and voila! The upstream DNS requests sent from your Pi-hole will be encrypted using TLS.Īs mentioned earlier, DNS-over-TLS is not a perfect solution to your privacy concerns. In the GUI, go to Settings -> DNS,Īnd set a custom IPv4 server with the value 127.0.0.1#5533 Now, we need to tell Pi-hole’s dnsmasq to use this local port as it’s upstream DNS server. To test that Unbound can fulfill your DNS requests, run the following dig command: Sudo systemctl restart unbound & sudo systemctl enable unbound Quad9 and Cloudflare upstream DNS servers, which you can change or add to if necessary. You’ll notice that this DNS server is configured to be accessible only on the local machine. Here’s a link to the file, and a copy of the contents here: # DNS Over TLS, Simple ENCRYPTED recursive caching DNS, TCP port 853 Once installed, run the following command to grab a configuration file: Pi-hole is a DNS sinkhole that protects your devices from unwanted content, without installing any client-side software. To install on a Debian-based system, run the following: (If you want to use CoreDNS instead, check out my other guide) To use DoT, we will actually need to run an additional DNS server, Pi-hole uses a fork of dnsmasq as it’s DNS server. One of the fundamental flaws of DNS is the lack of encryption or integrity, which allows your ISP to snoop DNS traffic or spoof a DNS response.ĭNS-over-TLS will not completely solve these problems (see the end of this tutorial), but it provides a step in the right direction. With this setup, a DNS query traverses: Client Pi-hole Unbound DNS Root Server / TLD Server / authoritative name server. ![]() Unbound is a validating, recursive, caching DNS resolver. Pi-hole is a wonderful program for both technical and non-technical users to run a local DNS caching server, allowing you to block malicious and ad-serving domains. Pi-hole is a DNS sinkhole that can block ads and trackers for all devices on your network. Protect your DNS traffic from snooping with DoT ![]()
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