Creating own CDN?

[pmeenan]

Are you doing it just for the learning exercise? Otherwise you could use Cloudflare just as a CDN and it's free (though you'll need a different domain for the assets you want to run through the CDN if you don't want to move your site's DNS over).

You should be able to do it with mod_proxy on the Windows server (assuming you can't install any other software) but you'd still have to do all of the work to route the correct user pools to the appropriate servers (either through DNS which will cost money or by modifying your site code to reference the static assets from a different domain based on the IP address of visitors).

With all that in place, if your server in the US is a shared server then there's a good chance it will still be slower.

My recommendation is to use an actual CDN - either Cloudflare for free or something like MaxCDN which is still really cheap.