The DNS proxy I didn't want to write, but that I had to write since everything else just sucks.
Adapted from the following projects:
Use DOCKER_BUILDKIT=1 docker build . to build the image, or docker-compose without special requirements.
It listens for plain old DNS requests and it forwards them to a DNS-over-HTTP(S) server of your choice.
It sets the X-Forwarded-For header to the IP address of the client that sent the request. This is useful to forward
the request to Adguard Home and be able to see which client made the request.
It also replies to requests to hosts found in specified /etc/hosts-like files.
The hosts file format is the same as the one used by /etc/hosts, with some extra features:
- Comments are allowed, and they start with a
#character. - All whitespace is ignored.
- You can define CNAME-like entries by using a domain name as the target of an entry, prefixed by a
@character.
Example:
# This is a comment
123.45.67.89 example.com # This is also a comment
@example.com example.org # This also resolves to 123.45.67.89
@google.com google-alias.com # This resolves to whatever google.com resolves to
"Just do whatever you want with it, I didn't want to write this in the first place", MIT license.