https://bugs.openldap.org/show_bug.cgi?id=10356
--- Comment #1 from Howard Chu hyc@openldap.org --- OpenLDAP 2.1.22 was broken, it was supposed to limit referral chasing but didn't. That was ITS#3578, fixed in 2005. OpenLDAP 2.4 works as designed. There is no bug here.