diff --git a/README.md b/README.md
index 1870a54..a6bae98 100644
--- a/README.md
+++ b/README.md
@@ -23,10 +23,11 @@ these custom users are properly authenticated.
 - `user_server_key` generation (`POST /generate-user-server-key-2`)
 - [user token generation](https://wiki.factorio.com/Web_authentication_API) and storage (`POST
   /api-login`), without any actual authentication
+    - LDAP auth backend
 
 ### Planned
 
-- auth backends: LDAP, user file, PAM(?)
+- more auth backends: user file, PAM(?)
 - server padlock proxying (to allow e.g. factorio.com users to join servers using a custom auth
   server)
 
diff --git a/config.toml.example b/config.toml.example
index 533c30d..e172d3e 100644
--- a/config.toml.example
+++ b/config.toml.example
@@ -3,3 +3,9 @@ port = 80
 
 [database]
 connection-string = "sqlite://sqlite.db"
+
+[[auth-backends]]
+type = "LDAP"
+server-address = "ldap://ldap.example.com"
+search-base = "ou=users,dc=example,dc=com"
+user-filter = "(|(uid=%s)(mail=%s))"