Help with SSL Certificate install

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Help with SSL Certificate install

Postby sestores » Wed Mar 30, 2016 3:13 pm

I am trying to install an SSL Certificate (Existing Cert expires tomorrow)
I am running into a problem and I remember having this same issue last time, but I have no idea how I got around it.

my local server name is zimbra.mydomain.local
We access this through

When I create the CSR, it tries to add zimbra.mydomain.LOCAL as a subject alt name.
I can remove it from the list before proceeding, but it appears that it still puts it in the CSR.
I generate the certificates using the CSR and go to install them and it lists zimbra.mydomain.LOCAL as one of the subject alt names
The certificate will not install because it says the .local domain is an invalid alt name.

What am I doing wrong? Why does zimbra insist on using the local server name as a subject alt name when local server names are not allowed?
I have tried generating the CSR again... ensuring the .local name is not listed in the subject alt names, but when I paste the CSR into here: https://cryptoreport.websecurity.symant ... rCheck.jsp
it shows the .local server name in the alt names still.

It looks like I need to revoke the cert I created, but the issuer wants to charge me to revoke it.
Is there some way to make this work? What am I missing?

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Re: Help with SSL Certificate install

Postby ppearl » Wed Mar 30, 2016 7:30 pm

See if helps you work around that issue with zmcertmgr.
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Re: Help with SSL Certificate install

Postby jorgedlcruz » Wed Mar 30, 2016 8:00 pm

I will recommend to you to change your DNS configuration, as .local is not a valid TLD, and you can't order a SSL with a .local anymore, more info here, search for the .local information

So, my recommendation will be to rename your Zimbra server internally, with all the internal DNS, etc. to a valid TLD domain, like and then you have multiple options:
  • If the internal hostname and the FQDN matchs, then buy a a simple SSL, like Comodo, RapidSSL, etc. This will be for example internall and externally
  • If the hostname and the FQDN doesn't match, you need to buy then a Multi-SAN SSL Certificate. For example your internal server is and your FQDN will be or
  • Finally and my suggestion in case you don't want to have much troubles, and also you can use the SSL in the future, is to buy a Wildcard SSL *, so you can name your server internally as you and then externally have the domain you want as well, plus if you have other servers and services like webpage, etc, you can use it as well

You have couple of articles about this:

Best regards
Jorge de la Cruz
Systems Engineer at Veeam Software

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