If Lemonldap::NG has to operate with another Web-SSO without any interworking system, Lemonldap::NG can be used as slave.
Install and adapt this file in an area protected by the master SSO
Use Lemonldap::NG::Handler::CDA to protect Lemonldap::NG area if this area is not in the same DNS domain than the portal
Authentication scheme :
a user that wants to access to a protected url, Lemonldap::NG::Handler redirect it to the portal
the portal creates the Lemonldap::NG session with the parameters given by the master SSO
the user is redirected to the wanted application. If it is not in the same domain, the handler detects the session id with the Lemonldap::NG cross-domain-authentication mechanism and generates the cookie