Website Performance and Security Blog

The Architecture of

At we wanted to enable people to use popular reverse proxies like Varnish Cache and ModSecurity to improve the performance and security of their websites but remove the hassle of dealing with deployments, high-availability, patching, TLS configuration, or instrumentation.

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Using as an Ssl Reverse Proxy

Using a reverse proxy for SSL can improve site load speed and free up resources on your servers.

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Using Varnish To Tweak Your Http Responses

Varnish is an excellent caching application, it’s what it’s designed for after all. However the fact that it ships with a built-in programming language (VCL) makes it very useful for tweaking how your site responds to HTTP requests. Often these can be things that you don’t really want your website to be concerned with, like sending some standard HTTP headers. Also it’s great for stopping unwanted requests from getting to your webserver, e.g. enforcing HTTPS.

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Hark A Vagrant

Coming from a background as a Windows developer, one of the biggest issues I faced when starting to build *nix apps was how to develop locally. Trying to develop a sails.js app or build a Varnish caching proxy on a Windows machine gets pretty fustrating pretty fast. Additionally even if you are running Ubuntu locally, unless you only work on a single project you’ll run into the issue of multiple apps needing port 80 for testing.

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Varnish is Caching Pages and ignoring "Cache-control: no-cache" header

TL;DR; - Before V4.0.0 Varish ignored the “Cache-control: no-cache” header by default, and you’ll need to handle this yourself in your VCL.

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Excellent Google PageSpeed Service Alternative

With Google’s recent announcement of the “Turn Down of PageSpeed Service”, users of the service should be asking what to do next.

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