Skip to content

linuxserver/ldap-auth pulls GitHub Stars GitHub Release GitHub Package Repository GitLab Container Registry Docker Pulls Docker Stars Jenkins Build LSIO CI

Ldap-auth software is for authenticating users who request protected resources from servers proxied by nginx. It includes a daemon (ldap-auth) that communicates with an authentication server, and a webserver daemon that generates an authentication cookie based on the user’s credentials. The daemons are written in Python for use with a Lightweight Directory Access Protocol (LDAP) authentication server (OpenLDAP or Microsoft Windows Active Directory 2003 and 2012).


Supported Architectures

We utilise the docker manifest for multi-platform awareness. More information is available from docker here and our announcement here.

Simply pulling should retrieve the correct image for your arch, but you can also pull specific arch images via tags.

The architectures supported by this image are:

Architecture Available Tag
x86-64 amd64-<version tag>
arm64 arm64v8-<version tag>

Application Setup

  • This container itself does not have any settings and it relies on the pertinent information passed through in http headers of incoming requests. Make sure that your webserver is set up with the right config.
  • Here's a sample config: nginx-ldap-auth.conf.
  • Unlike the upstream project, this image encodes the cookie information with fernet, using a randomly generated key during container creation (or optionally user defined).
  • Also unlike the upstream project, this image serves the login page at /ldaplogin (as well as /login) to prevent clashes with reverse proxied apps that may also use /login for their internal auth.


To help you get started creating a container from this image you can either use docker-compose or the docker cli.

    container_name: ldap-auth
      - PUID=1000
      - PGID=1000
      - TZ=Etc/UTC
      - FERNETKEY= #optional
      - CERTFILE= #optional
      - KEYFILE= #optional
      - 8888:8888
      - 9000:9000
    restart: unless-stopped

docker cli (click here for more info)

docker run -d \
  --name=ldap-auth \
  -e PUID=1000 \
  -e PGID=1000 \
  -e TZ=Etc/UTC \
  -e FERNETKEY= `#optional` \
  -e CERTFILE= `#optional` \
  -e KEYFILE= `#optional` \
  -p 8888:8888 \
  -p 9000:9000 \
  --restart unless-stopped \


Containers are configured using parameters passed at runtime (such as those above). These parameters are separated by a colon and indicate <external>:<internal> respectively. For example, -p 8080:80 would expose port 80 from inside the container to be accessible from the host's IP on port 8080 outside the container.

Ports (-p)

Parameter Function
8888 the port for ldap auth daemon
9000 the port for ldap login page

Environment Variables (-e)

Env Function
PUID=1000 for UserID - see below for explanation
PGID=1000 for GroupID - see below for explanation
TZ=Etc/UTC specify a timezone to use, see this list.
FERNETKEY= Optionally define a custom valid fernet key (only needed if container is frequently recreated, or if using multi-node setups, invalidating previous authentications)
CERTFILE= Optionally point this to a certificate file to enable HTTP over SSL (HTTPS) for the ldap auth daemon
KEYFILE= Optionally point this to the private key file, matching the certificate file referred to in CERTFILE

Volume Mappings (-v)

Volume Function

Miscellaneous Options

Parameter Function

Environment variables from files (Docker secrets)

You can set any environment variable from a file by using a special prepend FILE__.

As an example:

-e FILE__MYVAR=/run/secrets/mysecretvariable

Will set the environment variable MYVAR based on the contents of the /run/secrets/mysecretvariable file.

Umask for running applications

For all of our images we provide the ability to override the default umask settings for services started within the containers using the optional -e UMASK=022 setting. Keep in mind umask is not chmod it subtracts from permissions based on it's value it does not add. Please read up here before asking for support.

User / Group Identifiers

When using volumes (-v flags), permissions issues can arise between the host OS and the container, we avoid this issue by allowing you to specify the user PUID and group PGID.

Ensure any volume directories on the host are owned by the same user you specify and any permissions issues will vanish like magic.

In this instance PUID=1000 and PGID=1000, to find yours use id your_user as below:

id your_user

Example output:

uid=1000(your_user) gid=1000(your_user) groups=1000(your_user)

Docker Mods

Docker Mods Docker Universal Mods

We publish various Docker Mods to enable additional functionality within the containers. The list of Mods available for this image (if any) as well as universal mods that can be applied to any one of our images can be accessed via the dynamic badges above.

Support Info

  • Shell access whilst the container is running:

    docker exec -it ldap-auth /bin/bash
  • To monitor the logs of the container in realtime:

    docker logs -f ldap-auth
  • Container version number:

    docker inspect -f '{{ index .Config.Labels "build_version" }}' ldap-auth
  • Image version number:

    docker inspect -f '{{ index .Config.Labels "build_version" }}'

Updating Info

Most of our images are static, versioned, and require an image update and container recreation to update the app inside. With some exceptions (noted in the relevant, we do not recommend or support updating apps inside the container. Please consult the Application Setup section above to see if it is recommended for the image.

Below are the instructions for updating containers:

Via Docker Compose

  • Update images:

    • All images:

      docker-compose pull
    • Single image:

      docker-compose pull ldap-auth
  • Update containers:

    • All containers:

      docker-compose up -d
    • Single container:

      docker-compose up -d ldap-auth
  • You can also remove the old dangling images:

    docker image prune

Via Docker Run

  • Update the image:

    docker pull
  • Stop the running container:

    docker stop ldap-auth
  • Delete the container:

    docker rm ldap-auth
  • Recreate a new container with the same docker run parameters as instructed above (if mapped correctly to a host folder, your /config folder and settings will be preserved)

  • You can also remove the old dangling images:

    docker image prune

Image Update Notifications - Diun (Docker Image Update Notifier)


We recommend Diun for update notifications. Other tools that automatically update containers unattended are not recommended or supported.

Building locally

If you want to make local modifications to these images for development purposes or just to customize the logic:

git clone
cd docker-ldap-auth
docker build \
  --no-cache \
  --pull \
  -t .

The ARM variants can be built on x86_64 hardware using multiarch/qemu-user-static

docker run --rm --privileged multiarch/qemu-user-static:register --reset

Once registered you can define the dockerfile to use with -f Dockerfile.aarch64.


  • 30.06.24: - Rebase to Alpine 3.20.
  • 23.12.23: - Rebase to Alpine 3.19.
  • 20.06.23: - Sync upstream changes, including the ability to disable referrals with X-Ldap-DisableReferrals.
  • 25.05.23: - Rebase to Alpine 3.18, deprecate armhf.
  • 30.12.22: - Rebase to alpine 3.17.
  • 19.09.22: - Rebase to alpine 3.15.
  • 14.05.21: - Add linuxserver wheel index.
  • 12.02.21: - Clean up cargo/rust cache.
  • 10.02.21: - Rebasing to alpine 3.13.
  • 08.09.20: - Set form action correctly.
  • 30.07.20: - Fix bug related to unset optional CERTFILE and KEYFILE vars.
  • 27.07.20: - Add support for HTTP over SSL (HTTPS).
  • 21.07.20: - Add support for optional user defined fernet key.
  • 02.06.20: - Rebasing to alpine 3.12, serve login page at /ldaplogin as well as /login, to prevent clashes with reverese proxied apps.
  • 17.05.20: - Add support for self-signed CA certs.
  • 20.02.20: - Switch to python3.
  • 19.12.19: - Rebasing to alpine 3.11.
  • 01.07.19: - Fall back to base64 encoding when basic http auth is used.
  • 28.06.19: - Rebasing to alpine 3.10.
  • 23.03.19: - Switching to new Base images, shift to arm32v7 tag.
  • 22.02.19: - Rebasing to alpine 3.9.
  • 18.09.18: - Update pip
  • 14.09.18: - Add TZ parameter, remove unnecessary PUID/PGID params
  • 11.08.18: - Initial release.