1、apache
构造不存在的目录或文件，如果目标域是apache服务器容器，那么可能返回固定的响应。进而判断其是apache服务器容器。
Server: Apache<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>404 Not Found</title>
</head><body>
<h1>Not Found</h1>
<p>The requested URL was not found on this server.</p>
<hr>
<address>Apache Server at www.ecinnovations.com.cn Port 443</address>
</body></html>