Most simple varnish VCL /etc/varnish/1fh.vcl

1fh.vcl

backend default {
    .host = "127.0.0.1";  # IP address of your backend (Apache, nginx, etc.)
    .port = "8080";	  # Port your backend is listening on
}

sub vcl_recv {

    # Set the URI of your system directory
    if (req.request == "POST" || req.http.X-Requested-With == "XMLHttpRequest")
    {
     	return (pass);
    }

    unset req.http.Cookie;

    return(lookup);
}

sub vcl_fetch {

    # Our cache TTL
    set beresp.ttl = 1m;

    return(deliver);
}