Sympa is a mailing list manager.

To configure SSO with Sympa, you have the choice between:
  • CAS

  • Magic authentication: a special SSO URL is protected by LL::NG, Sympa will display a button for users who wants to use this feature.

We recommend to use CAS.


Sympa configuration

Edit the file “auth.conf”, for example:

vi /etc/sympa/auth.conf

And fill it:

    non_blocking_redirection        on
    auth_service_name               SSO
    ldap_get_email_by_uid_filter    (uid=[uid])
    ldap_timeout                    7
    ldap_suffix                     dc=example,dc=com
    ldap_scope                      sub
    ldap_email_attribute            mail

Restart services:

service sympa restart
service apache2 restart

See also official documentation

LemonLDAP::NG configuration

Declare CAS application in the configuration, register the service URL.

No attributes are needed.

Magic authentication


Since LL::NG 1.9, old Auto-Login feature has been removed since it works only with Sympa-5 which has been deprecated

Sympa configuration

Edit the file “auth.conf”, for example:

vi /etc/sympa/auth.conf

And fill it:

        service_name                   Centralized auth service
        service_id                          lemonldapng
        email_http_header            HTTP_MAIL
        netid_http_header             HTTP_AUTH_USER
        internal_email_by_netid    1


You can also disable internal Sympa authentication to keep only LemonLDAP::NG by removing user_table paragraph

Note that if you use FastCGI, you must restart Apache to enable changes.

You can also use <portal>?logout=1 as logout_url to remove LemonLDAP::NG session when “disconnect” is chosen.

Sympa virtual host

Configure Sympa virtual host like other protected virtual host but protect only magic authentication URL.


The location URL end is based on the service_id defined in Sympa apache configuration.

  • For Apache:

<VirtualHost *:80>

       <Location /wws/sso_login/lemonldapng>
       PerlHeaderParserHandler Lemonldap::NG::Handler


  • For Nginx:

server {
  listen 80;
  root /path/to/application;
  # Internal authentication request
  location = /lmauth {
    include /etc/nginx/fastcgi_params;
    fastcgi_pass unix:/var/run/llng-fastcgi-server/llng-fastcgi.sock;
    # Drop post data
    fastcgi_pass_request_body  off;
    fastcgi_param CONTENT_LENGTH "";
    # Keep original hostname
    fastcgi_param HOST $http_host;
    # Keep original request (LL::NG server will receive /lmauth)
    fastcgi_param X_ORIGINAL_URI  $original_uri;

  # Client requests
  location /wws/sso_login/lemonldapng {
    auth_request /lmauth;
    set $original_uri $uri$is_args$args;
    auth_request_set $lmremote_user $upstream_http_lm_remote_user;
    auth_request_set $lmlocation $upstream_http_location;
    error_page 401 $lmlocation;
    try_files $uri $uri/ =404;


    include /etc/lemonldap-ng/nginx-lua-headers.conf;
  location / {
    try_files $uri $uri/ =404;

Sympa virtual host in Manager

Go to the Manager and create a new virtual host for Sympa.

Configure the access rules and define the following headers:

  • Auth-User

  • Mail