[mrweasel]

> varnish is essentially built on apache

Do you mean built "for" Apache? Because I think it written from scratch.

I wouldn't call it useless, but it's not exactly a CDN, it's missing the "Network" bit. This is just caching. You'd need something like this, but scaled out on multiple locations for it to be a CDN.

Also most of it isn't exactly NetBSD related, the same approach works on anything that runs Varnish and Nginx.

[firesteelrain]

It was built in 2005 by Poul-Henning Kamp. It can work with Apache. But definitely not the same codebase.