root@ldap-server:~# ldapsearch -LLL -Y EXTERNAL -H ldapi:/// -b "cn=config" -s base
SASL/EXTERNAL authentication started
SASL username: gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth
SASL SSF: 0
dn: cn=config
objectClass: olcGlobal
cn: config
olcArgsFile: /var/run/slapd/slapd.args
olcLogLevel: none
olcPidFile: /var/run/slapd/slapd.pid
olcTLSCACertificateFile: /etc/ssl/certs/cacert.org_root.pem
olcTLSCertificateFile: /etc/ssl/certs/slapd-cert.pem
olcTLSCertificateKeyFile: /etc/ssl/private/slapd-key.pem
olcToolThreads: 1