376 lines
17 KiB
Markdown
376 lines
17 KiB
Markdown
---
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title: "LDAP"
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description: "Configuring LDAP"
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lead: "Authelia supports an LDAP server based first factor user provider. This section describes configuring this."
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date: 2022-06-15T17:51:47+10:00
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draft: false
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images: []
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menu:
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configuration:
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parent: "first-factor"
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weight: 102200
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toc: true
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aliases:
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- /c/ldap
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- /docs/configuration/authentication/ldap.html
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---
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## Configuration
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{{< config-alert-example >}}
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```yaml
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authentication_backend:
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ldap:
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address: 'ldap://127.0.0.1'
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implementation: 'custom'
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timeout: '5s'
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start_tls: false
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tls:
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server_name: 'ldap.example.com'
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skip_verify: false
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minimum_version: 'TLS1.2'
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maximum_version: 'TLS1.3'
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certificate_chain: |
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-----BEGIN CERTIFICATE-----
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MIIC5jCCAc6gAwIBAgIRAK4Sj7FiN6PXo/urPfO4E7owDQYJKoZIhvcNAQELBQAw
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EzERMA8GA1UEChMIQXV0aGVsaWEwHhcNNzAwMTAxMDAwMDAwWhcNNzEwMTAxMDAw
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MDAwWjATMREwDwYDVQQKEwhBdXRoZWxpYTCCASIwDQYJKoZIhvcNAQEBBQADggEP
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ADCCAQoCggEBAPKv3pSyP4ozGEiVLJ14dIWFCEGEgq7WUMI0SZZqQA2ID0L59U/Q
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/Usyy7uC9gfMUzODTpANtkOjFQcQAsxlR1FOjVBrX5QgjSvXwbQn3DtwMA7XWSl6
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LuYx2rBYSlMSN5UZQm/RxMtXfLK2b51WgEEYDFi+nECSqKzR4R54eOPkBEWRfvuY
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91AMjlhpivg8e4JWkq4LVQUKbmiFYwIdK8XQiN4blY9WwXwJFYs5sQ/UYMwBFi0H
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kWOh7GEjfxgoUOPauIueZSMSlQp7zqAH39N0ZSYb6cS0Npj57QoWZSY3ak87ebcR
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Nf4rCvZLby7LoN7qYCKxmCaDD3x2+NYpWH8CAwEAAaM1MDMwDgYDVR0PAQH/BAQD
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AgWgMBMGA1UdJQQMMAoGCCsGAQUFBwMBMAwGA1UdEwEB/wQCMAAwDQYJKoZIhvcN
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AQELBQADggEBAHSITqIQSNzonFl3DzxHPEzr2hp6peo45buAAtu8FZHoA+U7Icfh
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/ZXjPg7Xz+hgFwM/DTNGXkMWacQA/PaNWvZspgRJf2AXvNbMSs2UQODr7Tbv+Fb4
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lyblmMUNYFMCFVAMU0eIxXAFq2qcwv8UMcQFT0Z/35s6PVOakYnAGGQjTfp5Ljuq
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wsdc/xWmM0cHWube6sdRRUD7SY20KU/kWzl8iFO0VbSSrDf1AlEhnLEkp1SPaxXg
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OdBnl98MeoramNiJ7NT6Jnyb3zZ578fjaWfThiBpagItI8GZmG4s4Ovh2JbheN8i
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ZsjNr9jqHTjhyLVbDRlmJzcqoj4JhbKs6/I^invalid DO NOT USE=
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-----END CERTIFICATE-----
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-----BEGIN CERTIFICATE-----
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MIIDBDCCAeygAwIBAgIRALJsPg21kA0zY4F1wUCIuoMwDQYJKoZIhvcNAQELBQAw
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EzERMA8GA1UEChMIQXV0aGVsaWEwHhcNNzAwMTAxMDAwMDAwWhcNNzEwMTAxMDAw
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MDAwWjATMREwDwYDVQQKEwhBdXRoZWxpYTCCASIwDQYJKoZIhvcNAQEBBQADggEP
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ADCCAQoCggEBAMXHBvVxUzYk0u34/DINMSF+uiOekKOAjOrC6Mi9Ww8ytPVO7t2S
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zfTvM+XnEJqkFQFgimERfG/eGhjF9XIEY6LtnXe8ATvOK4nTwdufzBaoeQu3Gd50
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5VXr6OHRo//ErrGvFXwP3g8xLePABsi/fkH3oDN+ztewOBMDzpd+KgTrk8ysv2ou
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kNRMKFZZqASvCgv0LD5KWvUCnL6wgf1oTXG7aztduA4oSkUP321GpOmBC5+5ElU7
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ysoRzvD12o9QJ/IfEaulIX06w9yVMo60C/h6A3U6GdkT1SiyTIqR7v7KU/IWd/Qi
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Lfftcj91VhCmJ73Meff2e2S2PrpjdXbG5FMCAwEAAaNTMFEwDgYDVR0PAQH/BAQD
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AgKkMA8GA1UdJQQIMAYGBFUdJQAwDwYDVR0TAQH/BAUwAwEB/zAdBgNVHQ4EFgQU
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Z7AtA3mzFc0InSBA5fiMfeLXA3owDQYJKoZIhvcNAQELBQADggEBAEE5hm1mtlk/
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kviCoHH4evbpw7rxPxDftIQlqYTtvMM4eWY/6icFoSZ4fUHEWYyps8SsPu/8f2tf
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71LGgZn0FdHi1QU2H8m0HHK7TFw+5Q6RLrLdSyk0PItJ71s9en7r8pX820nAFEHZ
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HkOSfJZ7B5hFgUDkMtVM6bardXAhoqcMk4YCU96e9d4PB4eI+xGc+mNuYvov3RbB
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D0s8ICyojeyPVLerz4wHjZu68Z5frAzhZ68YbzNs8j2fIBKKHkHyLG1iQyF+LJVj
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2PjCP+auJsj6fQQpMGoyGtpLcSDh+ptcTngUD8JsWipzTCjmaNqdPHAOYmcgtf4b
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qocikt3WAdU^invalid DO NOT USE=
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-----END CERTIFICATE-----
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private_key: |
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-----BEGIN RSA PRIVATE KEY-----
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MIIEpAIBAAKCAQEA8q/elLI/ijMYSJUsnXh0hYUIQYSCrtZQwjRJlmpADYgPQvn1
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T9D9SzLLu4L2B8xTM4NOkA22Q6MVBxACzGVHUU6NUGtflCCNK9fBtCfcO3AwDtdZ
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KXou5jHasFhKUxI3lRlCb9HEy1d8srZvnVaAQRgMWL6cQJKorNHhHnh44+QERZF+
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+5j3UAyOWGmK+Dx7glaSrgtVBQpuaIVjAh0rxdCI3huVj1bBfAkVizmxD9RgzAEW
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LQeRY6HsYSN/GChQ49q4i55lIxKVCnvOoAff03RlJhvpxLQ2mPntChZlJjdqTzt5
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txE1/isK9ktvLsug3upgIrGYJoMPfHb41ilYfwIDAQABAoIBAQDTOdFf2JjHH1um
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aPgRAvNf9v7Nj5jytaRKs5nM6iNf46ls4QPreXnMhqSeSwj6lpNgBYxOgzC9Q+cc
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Y4ob/paJJPaIJTxmP8K/gyWcOQlNToL1l+eJ20eQoZm23NGr5fIsunSBwLEpTrdB
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ENqqtcwhW937K8Pxy/Q1nuLyU2bc6Tn/ivLozc8n27dpQWWKh8537VY7ancIaACr
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LJJLYxKqhQpjtBWAyCDvZQirnAOm9KnvIHaGXIswCZ4Xbsu0Y9NL+woARPyRVQvG
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jfxy4EmO9s1s6y7OObSukwKDSNihAKHx/VIbvVWx8g2Lv5fGOa+J2Y7o9Qurs8t5
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BQwMTt0BAoGBAPUw5Z32EszNepAeV3E2mPFUc5CLiqAxagZJuNDO2pKtyN29ETTR
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Ma4O1cWtGb6RqcNNN/Iukfkdk27Q5nC9VJSUUPYelOLc1WYOoUf6oKRzE72dkMQV
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R4bf6TkjD+OVR17fAfkswkGahZ5XA7j48KIQ+YC4jbnYKSxZTYyKPjH/AoGBAP1i
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tqXt36OVlP+y84wWqZSjMelBIVa9phDVGJmmhz3i1cMni8eLpJzWecA3pfnG6Tm9
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ze5M4whASleEt+M00gEvNaU9ND+z0wBfi+/DwJYIbv8PQdGrBiZFrPhTPjGQUldR
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lXccV2meeLZv7TagVxSi3DO6dSJfSEHyemd5j9mBAoGAX8Hv+0gOQZQCSOTAq8Nx
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6dZcp9gHlNaXnMsP9eTDckOSzh636JPGvj6m+GPJSSbkURUIQ3oyokMNwFqvlNos
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fTaLhAOfjBZI9WnDTTQxpugWjphJ4HqbC67JC/qIiw5S6FdaEvGLEEoD4zoChywZ
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9oGAn+fz2d/0/JAH/FpFPgsCgYEAp/ipZgPzziiZ9ov1wbdAQcWRj7RaWnssPFpX
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jXwEiXT3CgEMO4MJ4+KWIWOChrti3qFBg6i6lDyyS6Qyls7sLFbUdC7HlTcrOEMe
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rBoTcCI1GqZNlqWOVQ65ZIEiaI7o1vPBZo2GMQEZuq8mDKFsOMThvvTrM5cAep84
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n6HJR4ECgYABWcbsSnr0MKvVth/inxjbKapbZnp2HUCuw87Ie5zK2Of/tbC20wwk
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yKw3vrGoE3O1t1g2m2tn8UGGASeZ842jZWjIODdSi5+icysQGuULKt86h/woz2SQ
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27GoE2i5mh6Yez6VAYbUuns3FcwIsMyWLq043Tu2DNkx9ijOOAuQzw^invalid..
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DO NOT USE==
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-----END RSA PRIVATE KEY-----
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base_dn: 'DC=example,DC=com'
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additional_users_dn: 'OU=users'
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users_filter: '(&({username_attribute}={input})(objectClass=person))'
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additional_groups_dn: 'OU=groups'
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groups_filter: '(&(member={dn})(objectClass=groupOfNames))'
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group_search_mode: 'filter'
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permit_referrals: false
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permit_unauthenticated_bind: false
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user: 'CN=admin,DC=example,DC=com'
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password: 'password'
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attributes:
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distinguished_name: 'distinguishedName'
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username: 'uid'
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display_name: 'displayName'
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mail: 'mail'
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member_of: 'memberOf'
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group_name: 'cn'
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```
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## Options
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This section describes the individual configuration options.
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### address
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{{< confkey type="string" required="yes" >}}
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*__Reference Note:__ This configuration option uses the [address common syntax](../prologue/common.md#address). Please
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see the [documentation](../prologue/common.md#address) on this format for more information.*
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The LDAP URL which consists of a scheme, hostname, and port. Format is `[<scheme>://]<hostname>[:<port>]`. The default
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scheme is `ldapi` if the path is absolute otherwise it's `ldaps`, and the permitted schemes are `ldap`, `ldaps`, or
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`ldapi` (a unix domain socket).
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If the scheme is `ldapi` it must be followed by an absolute path to an existing unix domain socket that the
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user/group the Authelia process is running as has the appropriate permissions to access. For example if the socket is
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located at `/var/run/slapd.sock` the address should be `ldapi:///var/run/slapd.sock`.
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__Examples:__
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```yaml
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authentication_backend:
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ldap:
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address: 'ldaps://dc1.example.com'
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```
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```yaml
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authentication_backend:
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ldap:
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address: 'ldap://[fd00:1111:2222:3333::1]'
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```
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### implementation
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{{< confkey type="string" default="custom" required="no" >}}
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Configures the LDAP implementation used by Authelia.
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See the [Implementation Guide](../../reference/guides/ldap.md#implementation-guide) for information.
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### timeout
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{{< confkey type="duration" default="5s" required="no" >}}
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*__Reference Note:__ This configuration option uses the [duration common syntax](../prologue/common.md#duration).
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Please see the [documentation](../prologue/common.md#duration) on this format for more information.*
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The timeout for dialing an LDAP connection.
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### start_tls
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{{< confkey type="boolean" default="false" required="no" >}}
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Enables use of the LDAP StartTLS process which is not commonly used. You should only configure this if you know you need
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it. The initial connection will be over plain text, and *Authelia* will try to upgrade it with the LDAP server. LDAPS
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URL's are slightly more secure.
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### tls
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*__Reference Note:__ This configuration option uses the
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[TLS configuration common structure](../prologue/common.md#tls-configuration). Please see the
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[documentation](../prologue/common.md#tls-configuration) on this structure for more information.*
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Controls the TLS connection validation parameters for either StartTLS or the TLS socket.
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### base_dn
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{{< confkey type="string" required="yes" >}}
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Sets the base distinguished name container for all LDAP queries. If your LDAP domain is example.com this is usually
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`DC=example,DC=com`, however you can fine tune this to be more specific for example to only include objects inside the
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authelia OU: `OU=authelia,DC=example,DC=com`. This is prefixed with the [additional_users_dn](#additionalusersdn) for
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user searches and [additional_groups_dn](#additionalgroupsdn) for groups searches.
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### additional_users_dn
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{{< confkey type="string" required="no" >}}
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Additional LDAP path to append to the [base_dn](#basedn) when searching for users. Useful if you want to restrict
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exactly which OU to get users from for either security or performance reasons. For example setting it to
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`OU=users,OU=people` with a base_dn set to `DC=example,DC=com` will mean user searches will occur in
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`OU=users,OU=people,DC=example,DC=com`.
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### users_filter
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{{< confkey type="string" required="situational" >}}
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*__Note:__ This option is technically required however the [implementation](#implementation) option can implicitly set a
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default negating this requirement. Refer to the [filter defaults](../../reference/guides/ldap.md#filter-defaults) for
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more information.*
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The LDAP filter to narrow down which users are valid. This is important to set correctly as to exclude disabled users.
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The default value is dependent on the [implementation](#implementation), refer to the
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[attribute defaults](../../reference/guides/ldap.md#attribute-defaults) for more information.
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### additional_groups_dn
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{{< confkey type="string" required="no" >}}
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Similar to [additional_users_dn](#additionalusersdn) but it applies to group searches.
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### groups_filter
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{{< confkey type="string" required="situational" >}}
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*__Note:__ This option is technically required however the [implementation](#implementation) option can implicitly set a
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default negating this requirement. Refer to the [filter defaults](../../reference/guides/ldap.md#filter-defaults) for
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more information.*
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Similar to [users_filter](#usersfilter) but it applies to group searches. In order to include groups the member is not
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a direct member of, but is a member of another group that is a member of those (i.e. recursive groups), you may try
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using the following filter which is currently only tested against Microsoft Active Directory:
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`(&(member:1.2.840.113556.1.4.1941:={dn})(objectClass=group)(objectCategory=group))`
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### group_search_mode
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{{< confkey type="string" default="filter" required="no" >}}
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The group search mode controls how user groups are discovered. The default of `filter` directly uses the filter to
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determine the result. The `memberof` experimental mode does another special filtered search. See the
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[Reference Documentation](../../reference/guides/ldap.md#group-search-modes) for more information.
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### permit_referrals
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{{< confkey type="boolean" default="false" required="no" >}}
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Permits following referrals. This is useful if you have read-only servers in your architecture and thus require
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referrals to be followed when performing write operations.
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### permit_unauthenticated_bind
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{{< confkey type="boolean" default="false" required="no" >}}
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*__WARNING:__ This option is strongly discouraged. Please consider disabling unauthenticated binding to your LDAP
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server and utilizing a service account.*
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Permits binding to the server without a password. For this option to be enabled both the [password](#password)
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configuration option must be blank and the [password_reset disable](introduction.md#disable) option must be `true`.
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### permit_feature_detection_failure
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{{< confkey type="boolean" default="false" required="no" >}}
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Authelia searches for the RootDSE to discover supported controls and extensions. This option is a compatability option
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which *__should not__* be enabled unless the LDAP server returns an error when searching for the RootDSE.
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### user
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{{< confkey type="string" required="yes" >}}
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The distinguished name of the user paired with the password to bind with for lookup and password change operations.
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### password
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{{< confkey type="string" required="yes" >}}
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*__Important Note:__ This can also be defined using a [secret](../methods/secrets.md) which is __strongly recommended__
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especially for containerized deployments.*
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The password paired with the [user](#user) used to bind to the LDAP server for lookup and password change operations.
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It's __strongly recommended__ this is a
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[Random Alphanumeric String](../../reference/guides/generating-secure-values.md#generating-a-random-alphanumeric-string) with 64 or more
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characters and the user password is changed to this value.
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### attributes
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The following options configure The directory server attribute mappings.
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#### distinguished_name
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{{< confkey type="string" required="situational" >}}
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*__Note:__ This option is technically not required however it is required when using the group search mode
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`memberof` replacement `{memberof:dn}`.*
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The directory server attribute which contains the distinguished name, primarily used to perform filtered searches. There
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is a clear distinction between the actual distinguished name and a distinguished name attribute, all directories have
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distinguished names for objects, but not all have an attribute representing this that can be searched on.
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The only known support at this time is with Active Directory.
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#### username
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{{< confkey type="string" required="situational" >}}
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*__Note:__ This option is technically required however the [implementation](#implementation) option can implicitly set a
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default negating this requirement. Refer to the [attribute defaults] for more information.*
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The directory server attribute that maps to the username in *Authelia*. This must contain the `{username_attribute}` [placeholder].
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#### display_name
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{{< confkey type="string" required="situational" >}}
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*__Note:__ This option is technically required however the [implementation](#implementation) option can implicitly set a
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default negating this requirement. Refer to the [attribute defaults] for more information.*
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The directory server attribute to retrieve which is shown on the Web UI to the user when they log in.
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#### mail
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{{< confkey type="string" required="situational" >}}
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*__Note:__ This option is technically required however the [implementation](#implementation) option can implicitly set a
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default negating this requirement. Refer to the [attribute defaults] for more information.*
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The directory server attribute to retrieve which contains the users email addresses. This is important for the device
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registration and password reset processes. The user must have an email address in order for Authelia to perform
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identity verification when a user attempts to reset their password or register a second factor device.
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#### member_of
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{{< confkey type="string" required="situational" >}}
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*__Note:__ This option is technically required however the [implementation](#implementation) option can implicitly set a
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default negating this requirement. Refer to the [attribute defaults] for more information.*
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The directory server attribute which contains the groups a user is a member of. This is currently only used for the
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`memberof` group search mode.
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#### group_name
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{{< confkey type="string" required="situational" >}}
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*__Note:__ This option is technically required however the [implementation](#implementation) option can implicitly set a
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default negating this requirement. Refer to the [attribute defaults] for more information.*
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The directory server attribute that is used by Authelia to determine the group name.
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## Refresh Interval
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It's recommended you either use the default [refresh interval](introduction.md#refreshinterval) or configure this to
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a value low enough to refresh the user groups and status (deleted, disabled, etc) to adequately secure your environment.
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## Important notes
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Users must be uniquely identified by an attribute, this attribute must obviously contain a single value and be guaranteed
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by the administrator to be unique. If multiple users have the same value, Authelia will simply fail authenticating the
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user and display an error message in the logs.
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In order to avoid such problems, we highly recommended you follow [RFC2307] by using `sAMAccountName` for Active
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Directory and `uid` for other implementations as the attribute holding the unique identifier
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for your users.
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## See Also
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- [LDAP Reference Guide](../../reference/guides/ldap.md)
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[username attribute]: #username
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[TechNet wiki]: https://social.technet.microsoft.com/wiki/contents/articles/5392.active-directory-ldap-syntax-filters.aspx
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[RFC2307]: https://datatracker.ietf.org/doc/html/rfc2307
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[attribute defaults]: ../../reference/guides/ldap.md#attribute-defaults
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[placeholder]: ../../reference/guides/ldap.md#users-filter-replacements
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