你可以用 now 在清漆，做一个正则表达式的日期在清漆生产403或任何东西
这是一个样本 varnishtest 展示如何使用的案例 now ```
varnishtest "Time Gate"

server s1 {
rxreq
txresp

} -start

varnish v1 -vcl+backend {
import std;

sub vcl_recv {
    //now is in RFC format: Thu, 26 Apr 2018 08:40:22 GMT
    //set it in a "ghost header" to convert it to a STRING otherwise it is a TIME
    // and regex won't work
    set req.http.now_string = now;

    //Check the hour
    if(req.http.now_string ~ "^.* [0-9]{4} 08") {
          // Do stuff when its 08:xx
    } else {
         // Otherwise do something else.
    }

}

sub vcl_deliver {
    set resp.http.x-forwarded-for = client.ip;
    set resp.http.now_string = req.http.now_string;
}

} -start

client c1 {
txreq -url "/1"
rxresp
expect resp.http.now_string ~ "2018"

} -run

关于地理保护，你也可以用清漆来做https://github.com/varnish/libvmod-geoip 这个vmod(没有亲自测试过）