[jnpatel]

Is there a way in which MathJax could redirect their cdn.mathjax.org to cdnjs.cloudflare.com and maintain backwards compatibility for existing sites?

A DNS redirect would break the SSL, right? Perhaps a HTTP 3xx redirect?

[bhouston]

HTTP 3xx would work fine, but you would need an active server there. But really setting up nginx with such rules as basically the only thing it is doing to handle these requests on OVH or some other fairly unlimited bandwidth server shouldn't be too hard.

[jgrahamc]

Yes.