https_dns_proxy is a light-weight DNS<-->HTTPS, non-caching translation
proxy for the RFC 8484 DNS-over-HTTPS standard. It receives
regular (UDP) DNS requests and issues them via DoH.
Google's DNS-over-HTTPS service is default, but Cloudflare's service also works with trivial commandline flag changes.
# ./https_dns_proxy -u nobody -g nogroup -d -b 8.8.8.8,8.8.4.4 \
-r "https://dns.google/dns-query"# ./https_dns_proxy -u nobody -g nogroup -d -b 1.1.1.1,1.0.0.1 \
-r "https://cloudflare-dns.com/dns-query"Using DNS over HTTPS makes eavesdropping and spoofing of DNS traffic between you and the HTTPS DNS provider (Google/Cloudflare) much less likely. This of course only makes sense if you trust your DoH provider.
- Tiny Size (<30kiB).
- Uses curl for HTTP/2 and pipelining, keeping resolve latencies extremely low.
- Single-threaded, non-blocking select() server for use on resource-starved embedded systems.
- Designed to sit in front of dnsmasq or similar caching resolver for transparent use.
Depends on c-ares (>=1.11.0), libcurl (>=7.64.0), libev (>=4.25).
On Debian-derived systems those are libc-ares-dev, libcurl4-{openssl,nss,gnutls}-dev and libev-dev respectively. On Redhat-derived systems those are c-ares-devel, libcurl-devel and libev-devel.
On MacOS, you may run into issues with curl headers. Others have had success when first installing curl with brew.
brew install curl --with-openssl --with-c-ares --with-libssh2 --with-nghttp2 --with-gssapi --with-libmetalink
brew link curl --force
On Ubuntu
apt-get install cmake libc-ares-dev libcurl4-openssl-dev libev-dev build-essential
If all pre-requisites are met, you should be able to build with:
$ cmake .
$ make
There is no installer at this stage - just run it.
There is a package in the OpenWRT packages repository as well. You can install as follows:
root@OpenWrt:~# opkg update
root@OpenWrt:~# opkg install https-dns-proxy
root@OpenWrt:~# /etc/init.d/https-dns-proxy enable
root@OpenWrt:~# /etc/init.d/https-dns-proxy start
OpenWrt's init script automatically updates the dnsmasq config to include only DoH servers on its start and restores old settings on stop. Additional information on OpenWrt-specific configuration is available at the README.
If you are using any other resolver on your router you will need to manually replace any previously used servers with entries like:
127.0.0.1#5053
You may also want to prevent your resolver from using /etc/resolv.conf DNS servers, leaving only our proxy server.
There's also a WebUI package available for OpenWrt (luci-app-https-dns-proxy) which contains the list of supported and tested DoH providers.
There is also an externally maintained AUR package for latest git version. You can install as follows:
user@arch:~# yaourt -S https-dns-proxy-git
There is also an externally maintained Docker image for latest git version. Documentation, Dockerfile, and entrypoint script can be viewed on GitHub. An example run:
### points towards AdGuard DNS, only use IPv4, increase logging ###
docker run --name "https-dns-proxy" -p 5053:5053/udp \
-e DNS_SERVERS="94.140.14.14,94.140.15.15" \
-e RESOLVER_URL="https://dns.adguard.com/dns-query" \
-d bwmoran/https-dns-proxy \
-4 -vvv
Just run it as a daemon and point traffic at it. Commandline flags are:
Usage: ./https_dns_proxy [-a <listen_addr>] [-p <listen_port>]
[-d] [-u <user>] [-g <group>] [-b <dns_servers>]
[-r <resolver_url>] [-e <subnet_addr>]
[-t <proxy_server>] [-l <logfile>] -c <dscp_codepoint>
[-x] [-v]+
-a listen_addr Local IPv4/v6 address to bind to. (127.0.0.1)
-p listen_port Local port to bind to. (5053)
-d Daemonize.
-u user Optional user to drop to if launched as root.
-g group Optional group to drop to if launched as root.
-b dns_servers Comma-separated IPv4/v6 addresses and ports (addr:port)
of DNS servers to resolve resolver host (e.g. dns.google).
When specifying a port for IPv6, enclose the address in [].
(8.8.8.8,1.1.1.1,8.8.4.4,1.0.0.1,145.100.185.15,145.100.185.16,185.49.141.37)
-i polling_interval Optional polling interval of DNS servers.
(Default: 120, Min: 5, Max: 3600)
-4 Force IPv4 hostnames for DNS resolvers non IPv6 networks.
-r resolver_url The HTTPS path to the resolver URL. default: https://dns.google/dns-query
-t proxy_server Optional HTTP proxy. e.g. socks5://127.0.0.1:1080
Remote name resolution will be used if the protocol
supports it (http, https, socks4a, socks5h), otherwise
initial DNS resolution will still be done via the
bootstrap DNS servers.
-l logfile Path to file to log to. ("-")
-c dscp_codepoint Optional DSCP codepoint[0-63] to set on upstream DNS server
connections.
-x Use HTTP/1.1 instead of HTTP/2. Useful with broken
or limited builds of libcurl. (false)
-v Increase logging verbosity. (INFO)
-V Print version and exit.
- Add some tests.
- Aaron Drew ([email protected]): Original https_dns_proxy.
- Soumya (github.com/soumya92): RFC 8484 implementation.
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