slapd.conf master:
moduleload      syncprov
overlay         syncprov
syncprov-checkpoint 100 10
syncprov-sessionlog 100
index   objectClass,entryCSN,entryUUID  eq


slapd.conf slave:
syncrepl
    rid=1
    provider=ldap://192.168.0.1:389
    binddn="cn=sync_user,dc=domain,dc=com"
    bindmethod=simple
    credentials=secret
    searchbase="dc=domain,dc=com"
    filter="(objectClass=*)"
    attrs="*"
    schemachecking=off
    scope=sub
    type=refreshAndPersist
    interval=00:00:02:00
    retry="60 +"