The retro change log supports search operations. It is optimized for searches that include filters of this form:
As a general rule, do not perform add or modify operations on the retro change log entries. You can delete entries to trim the size of the log. The only time that you need to perform a modify operation on the retro change log is to modify the default access control policy.
Read, search, and compare rights are granted to all authenticated users (userdn=anyone, not to be confused with anonymous access where userdn=all) to the retro change log top entry cn=changelog .
Write and delete access are not granted, except implicitly to the Directory Manager.
Do not grant read access to anonymous users because the retro change log entries can contain modifications to sensitive information such as passwords. You may want to further restrict access to the retro change log contents if authenticated users should not be allowed to view its contents.
To modify the default access control policy that applies to the retro change log, modify the aci attribute of the cn=changelog entry. Refer to Chapter 6, Directory Server Access Control.