default.vcl

vcl 4.0;

acl purgers {
    "localhost";
    "127.0.0.1";
    "192.168.199.0"/24;
}

backend default {
    .host = "localhost";
    .port = "3000";
}

sub vcl_backend_response {
    set beresp.http.url = bereq.url;
}

sub vcl_deliver {
    if (resp.status != 200) {
        ban("obj.http.url == " + resp.http.url);
    }

    unset resp.http.url; # Optional
}

sub vcl_recv {

    if (req.method == "PURGE") {
        if (!client.ip ~ purgers) {
            return (synth(405));
        }
        return (purge);
    }

}