How to Enable Varnish Cache with LiteSpeed in cPanel

Varnish + LiteSpeed Compatibility

Port Configuration

Set Varnish to listen on port 80, LiteSpeed on 8080.

LiteSpeed External App

LiteSpeed WebAdmin → External App → Add 'LSAPI' pointing to localhost:8080.

Basic Varnish VCL

Backend Definition

backend litespeed {
  .host = "127.0.0.1";
  .port = "8080";
}

Cache Purge Support

LiteSpeed Cache plugin has built-in Varnish purge support.

Cache Stack Benefits Table