Intermediate Certificate issue

0 votes

Hi, Zoiper Community!

I have an Asterisc server, which is configured to use TLS. I have set up a free SSL certificate from My Certificate Chain is : My Private Certificate --> Class 1 Intermediate Server CA --> StartCom Root CA.

I have concatenated My Private Certificate and Class 1 Intermediate Server CA in one .pem file and specified it as tlscertfile=/etc/asterisk/keys/asterisk.pem in Asterisk configuratin. The StartCom Root CA is specified as a CA option tlscafile=/etc/asterisk/keys/ca.crt.

This configuration succesfully works with Zoiper for Android/Windows/Linux and Bria for IOS. Sip clients verify certificate chain and everything goes fine.

BUT, when i try setting up a Zoiper for IOS, I get "Certificate Validation Failure(503)". If I accept the "not validated" certificate, I still have a problem. When I try to call someone, I get "Not acceptable here (488)" error.

I'm looking for help and an explanation of my problem.

Many thanks in advance!

asked Oct 5, 2015 in iOS by bondarev2 (120 points)  

Hello, Could you please share which is the exact version of Zoiper that you are using?

2 Answers

0 votes


Error 488 is returned from the server. Please check with your VoIP provider. As for the certificate you would need to ignore its validation, because probably it is a self-signed one.

answered Apr 11, 2016 by Ivan (18,410 points)  
0 votes


I have same iisue. On android it work, on windows phone i have certificate validation failure. On IPhone Not acceptable here. 

On windows desktop is workin great.

Zoiper on WinPhone

Did you resolve it?

answered Jun 10, 2016 by sgureev (140 points)  

You will need to use the "Proceed anyway" option from the certificate validation when it prompts.

On windows phone Zoiper didn't show this dialog. On android it works.

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