I would like to create a subdomain or cname for "sub.mydomain.com". When entering the url I would like to repoint it to a SaaS service we subscribe to "service.otherdomain.com". I do not own the "service.otherdomain.com" domain. When going to "service.otherdomain.com" it is a secured (HTTPS) site. I have tried to use a cname and redirect the URL. The URL works however it gets a security error and loads the site but with a red unsecure message (chrome) in the address bar.
I understand that this is because of the certificate for "service.otherdomain.com". I am not trying to bypass security but would like to mask the URL from my customers without the unsecured message. Is there any way to do a redirect and mask for "sub.mydomain.com" to "service.otherdomain.com" without the cert error while maitaining the "sub.mydomain.com" in the address bar?