---
title: Authentication
intro: 'You can use {% data variables.product.prodname_ghe_server %}''s built-in authentication, or choose between CAS, LDAP, or SAML to integrate your existing accounts and centrally manage user access to {% data variables.product.product_location_enterprise %}.'
redirect_from:
  - /enterprise/admin/authentication
versions:
  enterprise-server: '*'
---


### Table of Contents

{% topic_link_in_list /authenticating-users-for-your-github-enterprise-server-instance %}
    {% link_in_list /using-built-in-authentication %}
    {% link_in_list /disabling-unauthenticated-sign-ups %}
    {% link_in_list /using-cas %}
    {% link_in_list /using-saml %}
    {% link_in_list /using-ldap %}
    {% link_in_list /allowing-built-in-authentication-for-users-outside-your-identity-provider %}
    {% link_in_list /changing-authentication-methods %}