I found out what was wrong myself:
the server is accessible through ldapsearch CLI (ldapsearch -x -H ldap://192.168.42.50 -b dc=mycompany,dc=nu ) on both 127.0.0.1 and 192.168.42.50
dscl shows (dscl localhost -list / ) LDAPv3 with one entry: 127.0.0.1, that is invalid.
I found out it has...