Is it possible to have SSL certificate for IP address, not domain name?

https dns ip-address ssl-certificate
Evgenyt picture Evgenyt · Jan 11, 2010 · Viewed 419.8k times · Source

I want my site to use URLs like http://192.0.2.2/... and https://192.0.2.2/... for static content to avoid unnecessary cookies in request AND avoid additional DNS request.

Is there any way to obtain SSL cert for this purpose?

Answer

Pekka picture Pekka · Jan 11, 2010

According to this answer, it is possible, but rarely used.

As for how to get it: I would tend to simply try and order one with the provider of your choice, and enter the IP address instead of a domain during the ordering process.

However, running a site on an IP address to avoid the DNS lookup sounds awfully like unnecessary micro-optimization to me. You will save a few milliseconds at best, and that is per visit, as DNS results are cached on multiple levels.

I don't think your idea makes sense from an optimization viewpoint.

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