Befor authentification, i need to call an EJB Stateless but i don't found parameter to turn off security on this EJB Stateless and turn on security on other EJB Stateless.
in the jboss.xml
<jboss> <security-domain>java:/jaas/example</security-domain> </jboss>
It requires a combination of unchecked in the ejb-jar.xml descriptor, and unauthenticatedIdentity in the login-config.xml setup of the security domain. See the JAAS Howto posting in this forum for an example.