hien/secureoperator

A DNS-protocol proxy for Google's DNS-over-HTTPS

secureoperator

A DNS-protocol proxy for Google's DNS-over-HTTPS: allows you to run a server on your local network which responds to DNS queries, but requests records across the internet using HTTPS.

Installation

You may retrieve binaries from the releases page, or install using go get:

go get -u github.com/fardog/secureoperator/cmd/secure-operator

Then either run the binary you downloaded, or the built package:

secure-operator

This will start a DNS server listening on TCP and UDP at :53. For usage information, run secure-operator --help.

Note: Running a service on port 53 requires administrative privileges on most systems.

Docker

There is a Docker image available for secureoperator:

docker pull fardog/secureoperator

The latest tag will always be the build from the master branch. If you wish to use one of the stable releases, use its version tag when pulling, e.g.:

docker pull fardog/secureoperator:v2.0.0

Version Compatibility

This package follows semver for its tagged releases. The master branch is always considered stable, but may break API compatibility. If you require API stability, either use the tagged releases or mirror on gopkg.in:

go get -u gopkg.in/fardog/secureoperator.v2

Security

Note that while DNS requests are made over HTTPS, this does not imply "secure"; consider the following:

• You must trust Google with your requests, see their privacy statement for further details.
• The lookup for the Google DNS endpoint must happen in some regard, although how this is handled is up to you:
  • The system DNS resolver is used to look up the endpoint (default)
  • You provide a list of DNS servers to use for the endpoint lookup
  • You provide the IP address(es) to the endpoint; and no unencrypted DNS lookup will be performed. However if the addresses change while the service is running, you will need to restart the service to provide new addresses.

Information on the usage of these options is available with secure-operator --help.

Caveats/TODO

• Currently only the following records are supported: A, AAAA, CNAME, MX
• More thorough tests should be written
• No caching is implemented, and probably never will. If you need caching, put your secure-operator server behind another DNS server which provides caching. (TODO: write instructions on setup, or provide a docker-compose configuration.)

Acknowledgments

This owes heavily to the following work:

• https://github.com/miekg/dns
• https://github.com/wrouesnel/dns-over-https-proxy
• https://github.com/StalkR/dns-reverse-proxy

License

   Copyright 2017 Nathan Wittstock

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0