Does Zoiper have problems with RapidSSL or wildcard certificates?

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Hi Zoipers,

I have a problem with TLS negotiation in two Zoiper versions (Zoiper 3.2.21357 64bit for Linux and Zoiper 3.6.1. for iPhone). In both versions I got "Certificate Validation Failure" for domain

Their certificate is signed by RapisSSL and apparently they have a wildcard certificate *

Do you have problems with their Certifice Authority or it is a problem with a wildcard certificate? Or anything else :)

Kind regards


asked Apr 29, 2016 in Linux by Efelin Novak (150 points)  

1 Answer

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Best answer


Wildcard certificates are explicitly forbidden for sip. I don't know why.
We are considering to ignore that part of the rfc.

answered Apr 29, 2016 by Joachim (11,490 points)  
selected May 4, 2016 by Efelin Novak

Hi Joachim,

thanks for a prompt reply. Can you point me to the mentioned specification/RFC?

Kind regards


I think it's in this one. (quick google search so could be wrong).

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