l.set_option(ldap.OPT_REFERRALS, 0)
l.set_option(ldap.OPT_PROTOCOL_VERSION, 3)
l.set_option(ldap.OPT_X_TLS, ldap.OPT_X_TLS_DEMAND)
l.set_option(ldap.OPT_X_TLS_DEMAND, True)
l.set_option(ldap.OPT_DEBUG_LEVEL, 255)
l.simple_bind_s('admin@tester.com', 'password')
Python+LDAP+SSL