On 01.12.2010, at 15:14, Tobias Pape wrote:

>> 
>> Firefox Nightly, too, doesn't include the DFN certificate.
>> 
>> On 12/01/2010 03:04 PM, Herbert König wrote:
>>> Hello Tobias,
>>> 
>>> TP> Should be trustet, Its a DFN-cert[1] with a Telekom Root Cert,
>>> TP> wich, as of [2], should be included in your Firefox.
>>> 
>>> for whatever reason a freshly installed Firefox 3.6.12 on a different
>>> computer has the same problem. Same with 3.5.16.
>>> 
>>> Usually I use Opera which doesn't have the problem.
>>> 
>>> Eager to try the projects tonight.
>>> 
>>> Thanks for sharing!
>>> 
>>> Cheers,
>>> 
>>> Herbert
> 
> 
> This seems strange, after all.
> Safari and Chrome don't seem to have the problem.
> I attached a screen shot of what the cert-chain look
> like on my safari.

Seems you missed my earlier mail.

Firefox does include the root certificate:

	http://www.mozilla.org/projects/security/certs/included/#T-Systems

But your server needs to send out the complete certificate chain, including the DFN certificate. See FAQ #7:

	https://www.pki.dfn.de/faqpki/faqpki-mozilla/

- Bert -