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Re: Problem with localhost unauthenticated bind

Hi Quanah,

On 22/05/12 03:26, Quanah Gibson-Mount wrote:
--On Monday, May 21, 2012 11:42 AM +0100 Tim Watts <tw@dionic.net> wrote:


I'm having a problem with a new LDAP server (slapd 2.4.23-7.2)

I'd like to have root@localhost be able to perform "manage" operations on
the slapd on the localhost *only* - all other ACLs would be pretty

The machine itself is considered secure.

Ideally, I'd like to do this with a mode(600) Unix Domain Socket owned by

How do you enable an "manage" ACL for the entire DN if and only if the
access comes via the unix socket?

olcAccess: {0}to attrs=userPassword,shadowLastChange by self write by
anonymous auth by dn="cn=admin,dc=cch,dc=kcl,dc=ac,dc=uk" write by * none

This says "self" can write to these attributes, regardless of origination
This says "anonymous" can access these when authenticating
This says the user "cn=admin..." can write to these attributes

olcAccess: {1}to dn.base="" by * read

This says anyone can read the base

olcAccess: {2}to * by peername.regex=127\.0\.0\.1 manage ###<<< Added

This is garbage

I'd go as far as "complete bollocks" ;-> I do not yet have a feel for this style of ACL, so I'm not surprised...

because you unnecessarily escaped the periods.

Ah. I did that because it is a regex (thinking in perl).

there is no need to use a regex, since you are being exact.

Yes - that does seem kind of obvious now you just said it :-o

olcAccess: {3}to * by self write by
dn="cn=admin,dc=cch,dc=kcl,dc=ac,dc=uk" write by * read

This ACL will never be evaluated because the ACL prior to this already
references "*".

Ah - I see...

My *guess* at what you are trying to do above would be:

olcAccess: {2}to * by self write by
dn="cn=admin,dc=cch,dc=kcl,dc=ac,dc=uk" write by peername.ip=
manage by peername.ip=::1 manage by * read

Cool - I'll try that.

However, this still isn't what you want, because that isn't restricting
by domain socket. As noted in the slapd.access man page, if you want to
limit by domain socket, you need to use the "path" prefix. I.e.


for example:


Ah - I see - sorry, my bad for not reading properly...

Anyway - big thanks - you've helped me to get a sane starting point. Once I get the hang of how the basics work, I should be able to experiment and learn some more...

All the best,


Tim Watts
Personal Blog: http://www.dionic.net/tim/