The subject distinguished name or subject DN of an X.509 certificate
consists of several Relative Distinguished Names (RDNs) and therefore
can be quite tiresome to write as in

"C=DE, ST=Mecklenburg-Vorpommern, L=Rostock, O=Finanzamt,
 OU=Zentrale Informations- und Annahmestelle, CN=steuerportal-mv.de,
 [email protected]"

Therefore often one or several subjectAlternativeNames or Aliases
are added as X.509v3 extensions to a certificate, like e.g.

  DNS:moon.strongswan.org
  email:[email protected]
  IP:11.22.33.44

(given in openssl.cnf notation) which saves a lot of typing work and
helps to eliminate errors.

Regards

Andreas

On 09/25/2011 02:58 PM, nima chavooshi wrote:
> 
> Hi
> Thanks a lot for your quick reply.
> Excuse me for my dummy question.I am some confused.
> May you give me more explanation about "subject distinguished name",
> "subjectAltName", "subject DN" field on X509 certification?
> According to your told, I should define lefid at least, is that true ?
> 
> Thanks in advance for any help or guidance 
> 
> On Sun, Sep 25, 2011 at 2:16 PM, Andreas Steffen
> <[email protected] <mailto:[email protected]>>
> wrote:
> 
>     Hello,
> 
>     left|rightid *must* be either the subject distinguished name or
>     a subjectAltName extension contained in the certificate. If you
>     don't define leftid or if leftid is not defined in the certificate
>     then automatically the subject DN is assumed as a default.
> 
>     As a responder you can define rightid=%any, in that case any
>     peer with a trusted and non-revoked certificate will be accepted.
> 
>     Regards
> 
>     Andreas

-- 
======================================================================
Andreas Steffen                         [email protected]
strongSwan - the Linux VPN Solution!                www.strongswan.org
Institute for Internet Technologies and Applications
University of Applied Sciences Rapperswil
CH-8640 Rapperswil (Switzerland)
===========================================================[ITA-HSR]==

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