查詢遠端網頁伺服器版本

telnet 主機IP/Domain service port
輸入 HEAD / HTTP/1.0 按下Enter

ex:
c:\> telnet 192.168.1.1 80
HTTP/1.1 200 OK
Date: Thu, 26 Jul 2012 03:58:45 GMT
Server: Apache/2.2.22 (MyOS) mod_ssl/2.2.22 OpenSSL/1.0.1a DAV/2
Last-Modified: Fri, 18 Jul 2003 06:52:30 GMT
ETag: "621abc-182-3c2b5d5162780"
Accept-Ranges: bytes
Content-Length: 386
Connection: close
Content-Type: text/html