My first question on here on SF so please forgive me if I manage to bork the post. :) Anyways, I'm using mod_rewrite on one of my machines with a simple rule that redirects to a webapp on another machine. I'm also setting the header 'Access-Control-Allow-Origin' on both machines. The problem is that when I hit the rewrite rule, I loose the 'Access-Control-Allow-Origin' header setting. Here's an example of the Apache config for the first machine: NameVirtualHost 10.0.0.2:80 <VirtualHost 10.0.0.2:80> DocumentRoot /var/www/host.example.com ServerName host.example.com JkMount /webapp/* jkworker Header set Access-Control-Allow-Origin "*" RewriteEngine on RewriteRule ^/otherhost http://otherhost.example.com/webapp [R,L] </VirtualHost> And here's an example of the Apache config for the second: NameVirtualHost 10.0.1.2:80 <VirtualHost 10.0.1.2:80> DocumentRoot /var/www/otherhost.example.com ServerName otherhost.example.com JkMount /webapp/* jkworker Header set Access-Control-Allow-Origin "*" </VirtualHost> When I hit host.example.com we see that the header is set: $ curl -i http://host.example.com/ HTTP/1.1 302 Moved Temporarily Server: Apache/2.2.11 (FreeBSD) mod_ssl/2.2.11 OpenSSL/0.9.7e-p1 DAV/2 mod_jk/1.2.26 Content-Length: 0 Access-Control-Allow-Origin: * Content-Type: text/html;charset=ISO-8859-1 And when I hit otherhost.example.com we see that it too is setting the header: $ curl -i http://otherhost.example.com HTTP/1.1 200 OK Server: Apache/2.0.46 (Red Hat) Location: http://otherhost.example.com/index.htm Content-Length: 0 Access-Control-Allow-Origin: * Content-Type: text/html;charset=UTF-8 But when I try to hit the rewrite rule at host.example.com/otherhost we get no love: $ curl -i http://host.example.com/otherhost/ HTTP/1.1 302 Found Server: Apache/2.2.11 (FreeBSD) mod_ssl/2.2.11 OpenSSL/0.9.7e-p1 DAV/2 mod_jk/1.2.26 Location: http://otherhost.example.com/ Content-Length: 0 Content-Type: text/html; charset=iso-8859-1 Can anybody point out what I'm doing wrong here? Could mod_jk be part of the problem?