Varnish 6 It's all about HTTP The Varnish Configuration Language Varnish Modules What is Varnish? Why Varnish 6? HTTP as the go-to protocol Invalidating the cache Varnish for operations What is VCL again? What's a VMOD? What is VCL? What's new in Varnish 6? HTTP caching Purging Install and configure Decision-making on the edge The finite state machine Which VMODs are shipped with Varnish Cache? Building your own CDN with Varnish Varnish Cache and Varnish Enterprise Closing notes Varnish Enterprise 6 Banning Varnish built-in VCL behavior Configuring Varnish Dealing with state Hooks, subroutines, and built-in VCL Which VMODs are shipped with Varnish Enterprise? What is a CDN? Which *use cases* does Varnish address? Where to get it Range requests Secondary keys TLS Body access VCL syntax Where can you find other VMODs? Under the hood Why Varnish? Chapter summary Conditional requests Forcing a miss Massive Storage Engine HTTP calls VCL objects and variables Writing your own VMODs Chapter summary Varnish CDN architecture Compression Distributed invalidation with Varnish Broadcaster Load balancing Database access Making changes Summary Caching video Content streaming Summary High Availability Geo features Validation and testing Request routing Summary Monitoring Summary Synthetic responses Varnish and 5G Logging Authentication Summary Security Summary Tuning Varnish The Varnish CLI The Varnish Controller Summary