How to redirect www to non-www?

I am using URL re-writer module provided by http://urlrewriter.net/ site. Can anyone tell me how can I use there module to redirect www.example.com to example.com (301 redirect)

Thanks

From stackoverflow

• I've never used urlrewriter, but it looks like you'd use the following (or something similar:

  <redirect url="^(.+)$" to="http://example.com/$1" permanent="true" />
  

  on the www.example.com site.

  abatishchev : It seems that your rule will redirect ANY request, also not domain which is specified. I mean if web site bindings are set to few domains, all of them will be redirected to one given

  lacqui : Ah, yes you're right. I'm used to .htacces, where it only affects the given path and subpaths.

• <redirect url="http://www.example.com/(.+)$" to="http://example.com/$1">
  

  configurator : Isn't the url only the part after the domain?

  Prashant : not working for me :(

• If you just want to redirect www.example.com:

  <if header="HTTP_HOST" match="www.example.com">
      <redirect url=".*" to="http://example.com$0" permanent="true" />
  </if>
  

  And if you want to redirect everything except example.com to example.com:

  <unless header="HTTP_HOST" match="example.com">
      <redirect url=".*" to="http://example.com$0" permanent="true" />
  </unless>
  

  Prashant : @Gumbo condition is working for me. is not working. has one little mistake "http://example.com/$0" it should be "http://example.com$0" else it will redirect you from "www.ex.com/dom/about.aspx" to "ex.com//dom/about.aspx" notice the double slashes. Rest its fine, thanks :)

  Prashant : Please edit that slash, for correct answer.