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tarrigo asked on

Rewrite Rule to redirect .mysite.com to www.mysite.com

I have tried many different ways of achieving a rewrite that would 301 any request to .mysite.com to www.mysite.com and although I can accomplish that, it screws up other subdomains that I don't want to have be affected.

For instance. I have used code like:

RewriteCond %{HTTPS} (on)?
RewriteCond %{HTTP:Host} ^(?!www\.)(.+)$ [NC]
RewriteCond %{REQUEST_URI} (.+)
RewriteRule .? http(?%1s)://www.%2%3 [R=301,L]

And that works, but it makes other subdomains that I need to have redirect correctly not work. An example would be:

cars.mysite.com would redirect with above rewrite rule to the following address:


That I of course don't want. Now the backstory is that I am permanently redirecting users from old subdomains because I no longer want to use subdomains except www. I am now using folders to seperate out sections of the site. I can successfully redirect people as long as I don't have the rewrite rule you see above, but it opens up problems because if I allow a wildcard in the DNS it allows anything to work and I don't want wwerwer.mysite.com to work or any other such bad urls.

Anybody encountered a similar problem of which they found a solution.
Microsoft IIS Web ServerWeb Development

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Last Comment

8/22/2022 - Mon


how many domains are we talking about?  Is it feasible to write a rule for each one?


(ps: I assume that you know that the rewrite rule above is not quite right...?)

We only have about 5 subdomains that we used to use. We just had a problem with a particular link somewhere that used iwww instead of www and google went and indexed a lot of pages under that subdomain. That worked because I had a wildcard in the DNS for any subdomain to be allowed.

The rule I use above isn't quite right as you said. At this point I just want all requests to http://mysite.com to 301 to www.mysite.com but most rules I have tried simply append the www to anything. So for instance, if I had a subdomain of http://cars.mysite.com the redirection would send the person to www.cars.mysite.com.

I am doing all this because I don't want there to be a split in google for http://mysite.com and http://www.mysite.com.


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