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I am currently using mod_rewrite to redirect all subdomains to https, but multiple sources have suggested that

Using mod_rewrite to do this isn't the recommended behavior. See RedirectSSL

The apache docs suggest Redirect and RedirectMatch:

A common use for RewriteRule is to redirect an entire class of URLs. For example, all URLs in the /one directory must be redirected to http://one.example.com/, or perhaps all http requests must be redirected to https.

These situations are better handled by the Redirect directive. Remember that Redirect preserves path information. That is to say, a redirect for a URL /one will also redirect all URLs under that, such as /one/two.html and /one/three/four.html.

Unfortunately, both of these documents (and anything else I have found) are only considering matching a single domain, rather than all subdomains. RedirectMatch seems like a good candidate for a relatively simple task like this, but I can't seem to get "http" to match as I expect:

RedirectMatch permanent "^http://(.*)$" "https://$1"

My guess as to why that doesn't work is because the redirectMatch is looking for a path and not a URI, but at this point I am stuck. Is it possible to accomplish a redirect of all subdomains to https without mod_rewrite, or is that the best available method?

MaxPRafferty
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1 Answers1

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Normally, for sub domains of different VHosts, I append the following line to each.

Redirect permanent / https://bar.example.com/

I normally just add one of these for each subdomain. If you have a very large number of sub domains, this method may not be very scalable, but it's simple and gets the job done.

Felix Jen
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