Download

We recommend using the latest Knot Resolver version. Our upstream releases undergo extensive automated testing and are suitable for production.

Packages available in your distribution's may be outdated. Follow the instructions below to obtain the latest Knot Resolver version for your distribution.

Please note that we occasionally release a major version which may require manual upgrade. Please subscribe to our knot-resolver-announce mailing list to be notified of new releases, including upgrade instructions if necessary.

Debian / Ubuntu

Please use our official repos for Debian and Ubuntu. Debian unstable and testing usually contain the latest Knot Resolver version.

After that apt will keep updating Knot Resolver from our repositories.

If you used our older repo until now, you may want to also uninstall the helper package by apt purge knot-resolver-release.

Fedora, RHEL derivatives

See instructions, based on version

openSUSE

Just add our COPR repository, based on the variant of your openSUSE:

# Leap 15.5
zypper addrepo https://copr.fedorainfracloud.org/coprs/g/cznic/knot-resolver5/repo/opensuse-leap-15.5/group_cznic-knot-resolver5-opensuse-leap-15.5.repo

# Tumbleweed
zypper addrepo https://copr.fedorainfracloud.org/coprs/g/cznic/knot-resolver5/repo/opensuse-tumbleweed/group_cznic-knot-resolver5-opensuse-tumbleweed.repo

Then you can install as usual with

zypper install knot-resolver

Source code

New releases are signed with one of our developer PGP keys:

https://secure.nic.cz/files/knot-resolver/kresd-keyblock.asc

pub   rsa4096 2022-03-07 [SC] [expires: 2030-02-03]
      3057EE9A448F362D74205A779AB120DA0A76F6DE
uid           Ales Mrazek <ales.mrazek@nic.cz>

pub   rsa4096 2016-10-16 [SCA] [expires: 2027-11-11]
      B6006460B60A80E782062449E747DF1F9575A3AA
uid           Vladimír Čunát (work) <vladimir.cunat@nic.cz>

Older releases may be signed using the following keys:

See the docs for instructions how to build from sources:

v6: https://knot-resolver.cz/documentation/latest/dev/build.html

v5: https://knot-resolver.cz/documentation/latest5/build.html

Docker image

Docker image is a simple way to experiment and does not require any dependencies or system modifications. It is important to note that the version 5 images are not designed for production use.

The images are available at hub.docker.com/r/cznic/knot-resolver.

A simple example would be

docker run --rm -ti --network host docker.io/cznic/knot-resolver

See more about docker deployments in [the documentation](https://www.knot-resolver.cz/documentation/latest/deployment-docker.html).