What is the difference between the authentication types in LDAP?

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Hello,

What are the key differences between using any of the following authentication types, when configuring the LDAP settings?

When should one type be chosen over the other?

Thank you for the help

João Pereira [SLC] Selected answer as best 29th June 2020

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These authentication types are part of the LDAP and or OpenLDAP standard.
Below you can find the details on some of the commonly used methods:

In the LDAP standard, authentication is supplied in the "bind" operation.

  • Anonymous: a client that sends an LDAP request without doing a bind.
  • Simple: sending the LDAP server the fully qualified DN of the user and the users' password.
  • SASL: Simple Authentication and Security Layer: specifies a challenge-response protocol in which data is exchanged between the client and the server for the purposes of authentication and establishment of a security layer (RF 2222).
João Pereira [SLC] Selected answer as best 29th June 2020