Basic configuration for EE and Varnish

ee-varnish.conf

 backend default {
    # .host = "XXX.XXX.XXX.XXX";
    .host = "127.0.0.1";      
    .port = "8080";     
}

sub vcl_recv {

    # Forward client's IP to backend
    remove req.http.X-Forwarded-For;
    set req.http.X-Forwarded-For = client.ip;

    if (req.url ~ "^/system" ||
        req.url ~ "^/admin.php" || 
        req.url ~ "^/admin" ||
        req.url ~ "^/preview-entries" ||
        req.url ~ "ACT=" ||
        req.request == "POST") {
        return (pass);
    }
    
    # Purge site from cache when 
    if (req.request == "EE_PURGE") {
        ban("req.http.host ~ domain.com && req.url ~ ^/.*$");
        error 200 "Purged";
    }
    
    unset req.http.Cookie;
    
    return (lookup);
}

sub vcl_fetch {

    set beresp.ttl = 60s;

    return (deliver);
}