Creating an AWS S3 shield with Varnish Enterprise

How to accelerate AWS S3 delivery and reduce AWS egress charges with an S3 shield powered by Varnish Enterprise.

SELinux FAQ

Frequently asked questions about SELinux and Varnish Enterprise

Reducing Video Startup Time using CMSD

Optimize VST for video-on-demand by ensuring startup objects are served from the edge cache

Securing multi-tier Varnish environments

How to make sure certain Varnish tiers are only accessible by other Varnish tiers.

Solutions and use cases

This tutorial shows how to configure Varnish for different use cases.

VSL cheatsheet

varnishlog, varnishncsa and ready-to-use VSL queries

DNS based GSLB (Global Server Load Balancer)

This tutorial shows how PowerDNS can be configured as a Global Server Load Balancer in front of a geographically distributed cluster of Varnish nodes.

Mixed content and ERR_TOO_MANY_REDIRECTS errors in WordPress when using Varnish

Fixing mixed content issues and avoiding the ERR_TOO_MANY_REDIRECTS error in WordPress when using Varnish.

Removing cookies in Varnish

How to remove cookies in Varnish

Bypassing the cache for specific URL patterns

How to bypass the cache for specific URLs and URL patterns in Varnish

Performing HTTP redirections in Varnish

Trigger vcl_synth and use a synthetic HTTP response to perform a HTTP redirections in Varnish

Using multiple backends in Varnish

Using multiple backends in Varnish

Banning content from Varnish

Use Varnish's ban mechanism to remove cached objects from the cache.

Purging content from Varnish

Use the purge return action in VCL to remove cached objects from the Varnish cache.

Configuring Varnish for Drupal

Configuring Varnish for Drupal

Configuring Varnish for Magento

Configuring Varnish for Magento

Configuring Varnish for WordPress

Configuring Varnish for WordPress

Example VCL template

An example VCL template for Varnish

Caching POST requests in Varnish

Learn how to cache POST requests with Varnish

Configuring systemd services

Managing the configuration of systemd services

Logging cache hits and misses

Logging cache hits and misses by tracking the request type (hit, miss, pass, pipe, synth, or hitmiss) in a custom x-cache request header

Avoiding HTTP to HTTPS redirect loops in Varnish

How to avoid HTTP to HTTPS redirect loops in Varnish by creating protocol-based cached variations.

Configuring Varnish for Adobe Experience Manager

Configuring Varnish for Adobe Experience Manager.

Configuring Varnish for ExpressionEngine

Configuring Varnish for ExpressionEngine.

Varnish Configuration Language (VCL)

The Varnish Configuration Language (VCL) is a domain-specific programming language used by Varnish to control request handling, routing, caching, and several other aspects.

Load a synthetic output template from a file

Load the VCL output template for vcl_synth and vcl_backend_error from a file.

Varnish built-in VCL

Learn about Varnish's default behavior by looking at the various subroutines that are part of the built-in VCL.

Using basic authentication in VCL backend probes

When your backend requires authorized access via basic authentication, you need to configure the health probe for your backend in VCL to support basic authentication.

Cache invalidation

How to invalidate and purge your cache