sources: add Kerberos (#10815)
* sources: introduce new property mappings per-user and group Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * sources/ldap: migrate to new property mappings Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * lint-fix and make gen Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * web changes Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * fix tests Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * update tests Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * remove flatten for generic implem Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * rework migration Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * lint-fix Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * wip Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * fix migrations Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * re-add field migration to property mappings Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * fix migrations Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * more migrations fixes Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * easy fixes Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * migrate to propertymappingmanager Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * ruff and small fixes Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * move mapping things into a separate class Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * migrations: use using(db_alias) Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * migrations: use built-in variable Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * add docs Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * add release notes Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * wip Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * wip Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * wip Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * wip Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * wip Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * wip Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * wip Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * wip Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * lint Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * fix login reverse Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * wip Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * wip Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * refactor source flow manager matching Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * kerberos sync with mode matching Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * fixup Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * wip Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * finish frontend Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * Optimised images with calibre/image-actions * make web Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * add test for internal password update Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * fix sync tests Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * fix filter Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * switch to blueprints property mappings, improvements to frontend Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * some more small fixes Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * fix reverse Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * properly deal with password changes signals Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * actually deal with it properly Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * fix Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * update docs Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * fix Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * fix Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * lint-fix Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * blueprints: realm as group: make it non default Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * small fixes and improvements Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * wip Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * fix title Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * add password backend to default flow Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * link docs page properly, add in admin interface, add suggestions for how to apply changes to a fleet of machines Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * add troubleshooting Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * fix default flow pass backend Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * fix flaky spnego tests Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * lint Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * properly convert gssapi name to python str Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * fix unpickable types Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * make sure the last server token is returned to the client Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * lint Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * Update website/docs/developer-docs/setup/full-dev-environment.md Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com> Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * Update website/docs/users-sources/sources/protocols/kerberos/browser.md Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com> Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * Update website/docs/users-sources/sources/protocols/kerberos/browser.md Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * Update website/docs/users-sources/sources/protocols/kerberos/browser.md Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com> Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * Update website/docs/users-sources/sources/protocols/kerberos/browser.md Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com> Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * Update website/docs/users-sources/sources/protocols/kerberos/index.md Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com> Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * Update website/docs/users-sources/sources/protocols/kerberos/index.md Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * Update website/docs/users-sources/sources/protocols/kerberos/index.md Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * Update website/docs/users-sources/sources/protocols/kerberos/index.md Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com> Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * Update website/docs/users-sources/sources/protocols/kerberos/browser.md Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com> Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * Update website/docs/users-sources/sources/protocols/kerberos/browser.md Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com> Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * Update website/docs/users-sources/sources/protocols/kerberos/browser.md Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com> Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * Update website/docs/users-sources/sources/protocols/kerberos/browser.md Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com> Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * Update website/docs/users-sources/sources/protocols/kerberos/browser.md Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com> Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * Update website/docs/users-sources/sources/protocols/kerberos/browser.md Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com> Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * Update website/docs/users-sources/sources/protocols/kerberos/browser.md Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com> Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * Update website/docs/users-sources/sources/protocols/kerberos/browser.md Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com> Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * Update website/docs/users-sources/sources/protocols/kerberos/browser.md Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com> Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * Update website/docs/users-sources/sources/protocols/kerberos/index.md Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com> Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * Update website/docs/users-sources/sources/protocols/kerberos/index.md Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com> Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * Update website/docs/users-sources/sources/protocols/kerberos/index.md Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com> Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * Update website/docs/users-sources/sources/protocols/kerberos/index.md Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com> Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * Update website/docs/users-sources/sources/protocols/kerberos/index.md Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com> Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * Update website/docs/users-sources/sources/protocols/kerberos/index.md Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com> Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * Update website/docs/users-sources/sources/protocols/kerberos/index.md Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com> Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * Update website/docs/users-sources/sources/protocols/kerberos/index.md Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com> Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * Update website/docs/users-sources/sources/protocols/kerberos/index.md Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com> Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * Update website/docs/users-sources/sources/protocols/kerberos/index.md Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com> Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * Update website/docs/users-sources/sources/protocols/kerberos/index.md Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com> Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * Update website/docs/users-sources/sources/protocols/kerberos/index.md Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com> Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * Update website/docs/users-sources/sources/protocols/kerberos/index.md Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com> Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * Update website/docs/users-sources/sources/protocols/kerberos/index.md Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com> Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * Update website/docs/users-sources/sources/protocols/kerberos/index.md Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * Update website/docs/users-sources/sources/protocols/kerberos/index.md Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com> Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * more docs review Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * fix missing library Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * fix missing library again Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * fix web import Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * fix sync Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * fix sync v2 Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> * fix sync v3 Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> --------- Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space> Co-authored-by: authentik-automation[bot] <135050075+authentik-automation[bot]@users.noreply.github.com> Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com>
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---
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title: Browser configuration for SPNEGO
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---
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You might need to configure your web browser to allow SPNEGO. Following are the instructions for major browsers.
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## Firefox
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1. In the address bar of Firefox, type `about:config` to display the list of current configuration options.
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2. In the **Filter** field, type `negotiate` to restrict the list of options.
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3. Double-click the `network.negotiate-auth.trusted-uris` entry to display the **Enter string value** dialog box.
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4. Enter the name of the domain against which you want to authenticate. For example, `.example.com`.
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On Windows environments, to automate the deployment of this configuration use a [Group policy](https://support.mozilla.org/en-US/kb/customizing-firefox-using-group-policy-windows). On Linux or macOS systems, use [policies.json](https://support.mozilla.org/en-US/kb/customizing-firefox-using-policiesjson).
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## Chrome
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This section applies only for Chrome users on macOS and Linux machines. For Windows, see the instructions below.
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1. Make sure you have the necessary directory created by running: `mkdir -p /etc/opt/chrome/policies/managed/`
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2. Create a new `/etc/opt/chrome/policies/managed/mydomain.json` file with write privileges limited to the system administrator or root, and include the following line: `{ "AuthServerWhitelist": "*.example.com" }`.
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**Note**: if using Chromium, use `/etc/chromium/policies/managed/` instead of `/etc/opt/chrome/policies/managed/`.
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To automate the deployment of this configuration use a [Group policy](https://support.google.com/chrome/a/answer/187202).
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## Windows / Internet Explorer
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Log into the Windows machine using an account of your Kerberos realm (or administrative domain).
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Open Internet Explorer, click **Tools** and then click **Internet Options**. You can also find **Internet Options** using the system search.
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1. Click the **Security** tab.
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2. Click **Local intranet**.
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3. Click **Sites**.
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4. Click **Advanced**.
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5. Add your domain to the list.
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6. Click the **Security tab**.
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7. Click **Local intranet**.
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8. Click **Custom Level**.
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9. Select **Automatic login only in Intranet zone**.
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To automate the deployment of this configuration use a [Group policy](https://learn.microsoft.com/en-us/previous-versions/troubleshoot/browsers/administration/how-to-configure-group-policy-preference-settings).
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130
website/docs/users-sources/sources/protocols/kerberos/index.md
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130
website/docs/users-sources/sources/protocols/kerberos/index.md
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---
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title: Kerberos
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---
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This source allows users to enroll themselves with an existing Kerberos identity.
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## Preparation
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The following placeholders will be used:
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- `REALM.COMPANY` is the Kerberos realm.
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- `authentik.company` is the FQDN of the authentik install.
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Examples are shown for an MIT Krb5 KDC system; you might need to adapt them for you Kerberos installation.
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There are three ways to use the Kerberos source:
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- As a password backend, where users can log in to authentik with their Kerberos password.
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- As a directory source, where users are synced from the KDC.
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- With SPNEGO, where users can log in to authentik with their [browser](./browser.md) and their Kerberos credentials.
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You can choose to use one or several of those methods.
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## Common settings
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In the authentik Admin interface, under **Directory** -> **Federation and Social login**, create a new source of type Kerberos with these settings:
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- Name: a value of your choosing. This name is shown to users if you use the SPNEGO login method.
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- Slug: `kerberos`
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- Realm: `REALM.COMPANY`
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- Kerberos 5 configuration: If you need to override the default Kerberos configuration, you can do it here. See [man krb5.conf(5)](https://web.mit.edu/kerberos/krb5-latest/doc/admin/conf_files/krb5_conf.html) for the expected format.
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- User matching mode: define how Kerberos users get matched to authentik users.
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- Group matching mode: define how Kerberos groups (specified via property mappings) get matched to authentik groups.
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- User property mappings and group property mappings: see [Source property mappings](../../property-mappings/index.md) and the section below for details.
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## Password backend
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No extra configuration is required. Simply select the Kerberos backend in the password stage of your flow.
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Note that this only works on users that have been linked to this source, i.e. they must have been created via sync or via SPNEGO.
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## Sync
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The sync process uses the [Kerberos V5 administration system](https://web.mit.edu/kerberos/krb5-latest/doc/admin/database.html) to list users. Your KDC must support it to sync users with this source.
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You need to create both a principal (a unique identity that represents a user or service in a Kerberos network) for authentik and a keytab file:
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```bash
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$ kadmin
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> add_principal authentik/admin@REALM.COMPANY
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> ktadd -k /tmp/authentik.keytab authentik/admin@REALM.COMPANY
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> exit
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$ cat /tmp/authentik.keytab | base64
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$ rm /tmp/authentik.keytab
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```
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In authentik, configure these extra options:
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- Sync users: enable it
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- Sync principal: `authentik/admin@REALM.COMPANY`
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- Sync keytab: the base64-encoded keytab created above.
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If you do not wish to use a keytab, you can also configure authentik to authenticate using a password, or an existing credentials cache.
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## SPNEGO
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You need to create both a principal (a unique identity that represents a user or service in a Kerberos network) for authentik and a keytab file:
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```bash
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$ kadmin
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> add_principal HTTP/authentik.company@REALM.COMPANY
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> ktadd -k /tmp/authentik.keytab HTTP/authentik.company@REALM.COMPANY
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> exit
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$ cat /tmp/authentik.keytab | base64
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$ rm /tmp/authentik.keytab
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```
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In authentik, configure these extra options:
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- SPNEGO keytab: the base64-encoded keytab created above.
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If you do not wish to use a keytab, you can also configure authentik to use an existing credentials cache.
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You can also override the SPNEGO server name if needed.
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You might need to configure your web browser to allow SPNEGO. Check out [our documentation](./browser.md) on how to do so. You can now login to authentik using SPNEGO.
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### Custom server name
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If your authentik instance is accessed from multiple domains, you might want to force the use of a specific server name. You can do so with the **Custom server name** option. The value must be in the form of `HTTP@authentik.company`.
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If not specified, the server name defaults to trying out all entries in the keytab/credentials cache until a valid server name is found.
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## Extra settings
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There are some extra settings you can configure:
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- Update internal password on login: when a user logs in to authentik using the Kerberos source as a password backend, their internal authentik password will be updated to match the one from Kerberos.
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- Use password writeback: when a user changes their password in authentik, their Kerberos password is automatically updated to match the one from authentik. This is only available if synchronization is configured.
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## Kerberos source property mappings
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See the [overview](../../property-mappings/index.md) for information on how property mappings work with external sources.
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By default, authentik ships with [pre-configured mappings](#built-in-property-mappings) for the most common Kerberos setups. These mappings can be found on the Kerberos Source Configuration page in the Admin interface.
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### Built-in property mappings
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Kerberos property mappings are used when you define a Kerberos source. These mappings define which Kerberos property maps to which authentik property. By default, the following mappings are created:
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- authentik default Kerberos User Mapping: Add realm as group
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The realm of the user will be added as a group for that user.
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- authentik default Kerberos User Mapping: Ignore other realms
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Realms other than the one configured on the source are ignored, and log in is not allowed.
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- authentik default Kerberos User Mapping: Ignore system principals
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System principals such as `K/M` or `kadmin/admin` are ignored.
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- authentik default Kerberos User Mapping: Multipart principals as service accounts
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||||
Multipart principals (for example: `HTTP/authentik.company`) have their user type set to **service account**.
|
||||
|
||||
These property mappings are configured with the most common Kerberos setups.
|
||||
|
||||
### Expression data
|
||||
|
||||
The following variable is available to Kerberos source property mappings:
|
||||
|
||||
- `principal`: a Python string containing the Kerberos principal. For example `alice@REALM.COMPANY` or `HTTP/authentik.company@REALM.COMPANY`.
|
||||
|
||||
## Troubleshooting
|
||||
|
||||
You can start authentik with the `KRB5_TRACE=/dev/stderr` environment variable for Kerberos to print errors in the logs.
|
||||
Reference in New Issue
Block a user