XWiki supports several authentication mechanisms by default:

• Form authentication
• Basic authentication
• LDAP authentication

In addition XWiki allows you to create your own authentication extension in order to integrate with any custom mechanism you might be using already (SSO, etc).

Note that several additional authenticators are being developed and are currently available as extensions on extensions.xwiki.org or in source format in our Contribution repository:

• Headers authentication
• NTLM authentication
• PUMA authentication
• SAML authentication
• Trusted LDAP authentication
• Sun SSO authentication

For more details on how to configure authentication check the Authentication page of the Administration Guide.