Re: Restricting access based on IP Address

[Aaron Richton <richton@nbcs.rutgers.edu>]

On Tue, 4 Mar 2014, kevin sullivan wrote:

> Hi, I am running an OpenLDAP server version 2.4.23 and I would like to 
> restrict a user from connecting unless they are connecting via an ldapi 
> connection or localhost. Specifically, I would like to only let the 
> rootdn manage things from localhost or from an ldapi connection, which 
> ensures that they are on localhost. I do not want to prevent other users 
> from connecting to my LDAP server via an ldaps connection from anywhere 
> on the network.
>
> Is this possible? I have read a good bit about access control 
> directives, but I haven't seen what I am looking for. I am guessing that 
> what I am looking for probably deals with 'sockname' or 'sockurl', but I 
> don't know how to use those statements to properly configure slapd.

Well, you can't restrict the rootdn. If you're looking to implement 
mandatory restrictions, your first step is to unconfigure rootdn/rootpw.

Then check slapd.access(5) and the FAQ entry on controls
http://www.openldap.org/faq/data/cache/454.html

and take a look at some decent examples: 
http://www.openldap.org/lists/openldap-software/200803/msg00237.html


So depending on your exact needs, perhaps you'd craft an ACL that allows 
your admin DN auth only from the blessed peername/sockname. And then 
(onion layer; most of this should never hit) only allow manage from 
sockurl/peername and by the admin DN. (There's more examples of using 
"continue" / "break" to form logical conditionals in the archives.)

And of course test thoroughly with slapacl(8) and appropriate slapd(8) 
debugging levels!