您必须在某处有一条规则来读取 HTTP_REFERER 并拒绝来自 Facebook 的传入链接。严重地。这就是两行之间发生的事情:
没有推荐人
telnet www.offshoreinjuries.com 80
HEAD /blog/deepwater-horizon-11/ HTTP/1.1
Host: www.offshoreinjuries.com
HTTP/1.1 200 OK
Date: Fri, 28 May 2010 09:19:45 GMT
Server: Apache/2.2.14 (Unix) mod_ssl/2.2.14 OpenSSL/0.9.8i DAV/2 mod_auth_passthrough/2.1 mod_bwlimited/1.4 FrontPage/5.0.2.2635
X-Powered-By: PHP/5.2.12
X-Pingback: http://www.offshoreinjuries.com/blog/xmlrpc.php
Content-Type: text/html; charset=UTF-8
200 好的,不错。
脸书推荐人
telnet www.offshoreinjuries.com 80
HEAD /blog/deepwater-horizon-11/ HTTP/1.1
Host: www.offshoreinjuries.com
Referer: http://www.facebook.com/l.php?u=http%3A%2F%2Fwww.offshoreinjuries.com%2Fblog%2Fdeepwater-horizon-11%2F&h=834ea
HTTP/1.1 403 Forbidden
Date: Fri, 28 May 2010 09:21:04 GMT
Server: Apache/2.2.14 (Unix) mod_ssl/2.2.14 OpenSSL/0.9.8i DAV/2 mod_auth_passthrough/2.1 mod_bwlimited/1.4 FrontPage/5.0.2.2635
Content-Type: text/html; charset=iso-8859-1
403 禁止,不好。
任何其他推荐人
telnet www.offshoreinjuries.com 80
HEAD /blog/deepwater-horizon-11/ HTTP/1.1
Host: www.offshoreinjuries.com
Referer: http://alvaro.es/
HTTP/1.1 200 OK
Date: Fri, 28 May 2010 09:20:36 GMT
Server: Apache/2.2.14 (Unix) mod_ssl/2.2.14 OpenSSL/0.9.8i DAV/2 mod_auth_passthrough/2.1 mod_bwlimited/1.4 FrontPage/5.0.2.2635
X-Powered-By: PHP/5.2.12
X-Pingback: http://www.offshoreinjuries.com/blog/xmlrpc.php
Content-Type: text/html; charset=UTF-8
200 再次确定。
您的服务器正在积极拒绝来自 Facebook 的访问者。