Why isn’t it possible to use a CNAME redirect with HTTPS

http redirect https dns cname
qdii picture qdii · Feb 15, 2012 · Viewed 65.8k times · Source

This Google Storage documentation page states that You can use a CNAME redirect only with HTTP, not with HTTPS. But I cannot see any reason for that. Can anyone explain me why?

Answer

Shiji.J picture Shiji.J · Oct 15, 2013

It is possible!

There could be many domains attached to one SSL certificate.

ASSUME travel-maps.example.com CNAME c.commondatastorage.googleapis.com.

When both domains are in the SSL cert list, your CNAME can redirect with HTTPS.

Demo

This is how CDN service provider such as Incapsula with works with HTTPS. They just create a "Multi-domain" SSL cert for you.

You may check a demo cert-info in this site. https://www.incapsula.com/

Any way, this kind of SSL cert is for business use in most case and are generally pretty expensive.

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