HTTP/1.1 302 Found
Server: nginx/1.19.1
Date: Tue, 31 Aug 2021 11:20:43 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 0
Connection: keep-alive
Keep-Alive: timeout=10
X-Powered-By: PHP/5.6.40
Set-Cookie: SESS=1k7j0a9jhqg5nqhf67odit3jq2; path=/
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache
Location: /aut.php
Location: /aut.php
if (in_array($_SERVER['REMOTE_ADDR'], ['ip_или_несколько_ ip_вапкассы'])) {
# сюда код обработчика вапкассы
}