Hello, I am trying to use ldap module. But failed to connect.... With SSL // /Wed Apr 25 13:47:07 2018 : Info: rlm_ldap (ldap): Opening additional connection (0), 1 of 32 pending slots used// //Wed Apr 25 13:47:07 2018 : Debug: rlm_ldap (ldap): Connecting to ldap://ldap-server:636// //Wed Apr 25 13:47:07 2018 : Debug: rlm_ldap (ldap): New libldap handle 0x55de89593c20// //TLS: can't connect: (unknown error code).// //Wed Apr 25 13:47:08 2018 : Error: rlm_ldap (ldap): Bind with cn=admin,dc=mydomain,dc=gr to ldap://ldap-server:636 failed: Can't contact LDAP server// //Wed Apr 25 13:47:08 2018 : Debug: rlm_ldap: Closing libldap handle 0x55de89593c20// //Wed Apr 25 13:47:08 2018 : Error: rlm_ldap (ldap): Opening connection failed (0)// //Wed Apr 25 13:47:08 2018 : Debug: rlm_ldap (ldap): Removing connection pool// //Wed Apr 25 13:47:08 2018 : Error: /etc/freeradius/3.0/mods-enabled/ldap[8]: Instantiation failed for module "ldap"/ Without SSL Wed Apr 25 13:51:52 2018 : Info: rlm_ldap (ldap): Opening additional connection (0), 1 of 32 pending slots used Wed Apr 25 13:51:52 2018 : Debug: rlm_ldap (ldap): Connecting to ldap://ldap-server:389 Wed Apr 25 13:51:52 2018 : Debug: rlm_ldap (ldap): New libldap handle 0x55f00a1e4c20 Wed Apr 25 13:51:52 2018 : Error: rlm_ldap (ldap): Bind with cn=admin,dc=mydomain,dc=gr to ldap://ldap-server:389 failed: Can't contact LDAP server Wed Apr 25 13:51:52 2018 : Debug: rlm_ldap: Closing libldap handle 0x55f00a1e4c20 Wed Apr 25 13:51:52 2018 : Error: rlm_ldap (ldap): Opening connection failed (0) Wed Apr 25 13:51:52 2018 : Debug: rlm_ldap (ldap): Removing connection pool Wed Apr 25 13:51:52 2018 : Error: /etc/freeradius/3.0/mods-enabled/ldap[8]: Instantiation failed for module "ldap" Any ideas? I am using Freeradius 3.0.12 with Debian....