On 2018-Dec-20, Kumar, Virendra wrote: > This is what I see: > -- > [postgres@usdf24v0131 ~]$ which postgres > /opt/postgres/10/bin/postgres > [postgres@usdf24v0131 ~]$ ldd /opt/postgres/10/bin/postgres > linux-vdso.so.1 => (0x00007ffee3fe8000) > libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f9a7f125000) > librt.so.1 => /lib64/librt.so.1 (0x00007f9a7ef1d000) > libdl.so.2 => /lib64/libdl.so.2 (0x00007f9a7ed19000) > libm.so.6 => /lib64/libm.so.6 (0x00007f9a7ea17000) > libldap-2.4.so.2 => /lib64/libldap-2.4.so.2 (0x00007f9a7e7c2000) I'm going to risk it and say that this is indeed OpenLDAP -- but you can confirm by doing this: rpm -qf /lib64/libldap-2.4.so.2 Anyway, little birdies tell me that OpenLDAP does not really live up to its own documentation, because this feature does not in fact work. -- Álvaro Herrera https://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services