On 10/18/05 10:24 AM, "Fred Viles" <[EMAIL PROTECTED]> wrote:

> On 18 Oct 2005 at 18:18, Heiko Schlittermann wrote about
>     "Re: [exim] LDAP lookup over SSL":
> 
> | Cyril Feraudet <[EMAIL PROTECTED]> (Di 18 Okt 2005 10:58:32 CEST):
> | > it is possible to bind an ldap server over ssl (not start TLS).
> | 
> | I think, currently it (TLS on connect) is the only possibility to use
> encryption for LDAP
> | queries.
> 
> Hmm?  I am not an expert of SSL or LDAP, but I don't see how
> encryption of the SMTP session has any relationship with encryption
> of database queries being made by exim.

Indeed.  But that's not the question I see above.

First:  Exam question:  Discuss LDAP over SLL as you understand it.
Exam answer:  LDAP over SLL as I understand it is not very well understood.

With that out of the way, suitable LDAP servers provide for SSL-protected
connections on--by convention--port 636.  These are  similar to the
ssl-on-connect connections for SMTP using--typically--port 465.

LDAPv3 provides the alternative of a STARTTLS means of using the normal LDAP
port (389).  

OpenLDAP seems to provide support for ldaps: URLS using the port 636
mechanism.  A look through Google (while dodging LDAPS, the Lego Design and
Programming System) leaves me dubious about support in OpenLDAP for
STARTTLS, although 
man -S3 ldap
seems encouraging.

Next question is what parts of this does Exim support in making LDAP
lookups.  Presumably, the answer is revealed in the source.

  --John



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