how to redirect https to new domain?

Question

I redeveloped my company's website and I'm having some issues with redirecting / SSL

Typing or clicking on http://olddomain.org redirects just fine to https://newdomain.com. However, typing or clicking on the link https://olddomain.org does not redirect to https://newdomain.com and I get this error:

Firefox does not trust this site because it uses a certificate that is not valid for olddomain.org. The certificate is only valid for the following names: *.newdomain.com, newdomain.com

Is there some rewrite conditions I can put in my .htaccess file to fix this? Or is this an issue with the way that I set up the SSL certificate for the new domain?

Here's what I've tried so far:

 <IfModule mod_rewrite.c>
  RewriteEngine On
  Redirect 301 / http://newdomain.com/
 </IfModule>
  <br />

and

  RewriteEngine on
  RewriteCond %{HTTP_HOST} ^(www\.)?http://olddomain\.org$
  RewriteRule ^(.*)$ http://newdomain.com/$1 [R=301,QSA,L]

Answer 1

Or is this an issue with the way that I set up the SSL certificate for the new domain?

Yes, you need a valid SSL cert that covers the old domain (as indicated in the browser error... "it uses a certificate that is not valid for olddomain.org").

Without the valid cert the browser cannot connect (securely) to olddomain.org so never even sees the redirect directives.