Re: ldap proxy to AD with local ACLs
Meike Stone wrote:
Hello,
it is me again regarding the ldap-backend.
As told, I've installed a openldap as proxy in a DMZ for authentication
forwarding to an Active Directoy. The Proxy is used by a VPN gateway.
That all works very well. But now, I want to protect the AD from modifying.
Only password changes from the user by self should be allowed.
But as I see or understand, ACLs from a backend are used, AFTER the
result from remote LDAP (AD) are coming back?! See second sentence
from http://www.openldap.org/faq/data/cache/532.html:
"It allows the common configuration directives as suffix, which is
used to select it when a request is received by the server, *ACLs,
which are applied to search results*, size and time limits, and so on.
"
Correct. back-ldap only performs ACL checks on search responses.
So is it (and how is it) possible, to "switch" the
ldap-backend in
"read only mode" and only pass the the password change (modify:
DEL/ADD)?
You could use the denyop overlay to deny all write operations. I don't know of
any way currently to allow only passwordModify exops, it would actually allow
all extended operations.
--
-- Howard Chu
CTO, Symas Corp. http://www.symas.com
Director, Highland Sun http://highlandsun.com/hyc/
Chief Architect, OpenLDAP http://www.openldap.org/project/