At 06:45 AM 1/22/2007, skalyanasundaram wrote:
>Hi,
>  I have a very basic doubt.
>  I am trying to make client program which should work for both openldap
>and as well as eDirectory. I am going to use openldap APIs only. My
>situation is the server can be configured either to "use TLS for simple
>bind with password" or not to use. So the client user knows what the
>server has (TLS or not). Based on that he will mention the options 
>through the command line (port number 389 or 636) and boolean for use ssl
>or not.
>
>What is the difference between TLS/SSL.

Without any particular qualification, the terms TLS and SSL are
synonymous.

> I am so confused after googling so
>much. Both are variant of same protocol?

TLSv1 and SSLv3 are variants of the same protocol. That is,
the terms are not synonymous when qualified.

>Somebody says TLS is on top of
>SSL,

That's the same as somebody saying "TLS is on top of TLS" or
"SSL is on top of SSL".  Technically, possibly... but....

>it tries for SSL connection and if it is not able to create secured
>channel it goes for non-secured channel. Is it that way?
>
>Is it possible to create TLS connection on both the port 389, 636.

You can run ldap:// on any port and then initiate TLS (SSL) via the
Start TLS operation.  389 is the default port for ldap://
You can run ldaps:// on any port and have TLS (SSL) initiated upon
connect. 636 is the default port for ldaps://

In either case, one ends up with LDAP protected by TLS (SSL).
The difference is how TLS is initiated.

Kurt



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