Web服务器的安全和攻击防范(8)

kris@valiant:~/www <   cat urlencode.php#! /home/kris/bin/php -q<  ?php  print urlencode($argv[1])."n";? >kris@valiant:~/www <   ./urlencode.php "this is a test"this+is+a+test

kris@valiant:~/www <   telnet valiant 80Trying 193.102.57.3...Connected to valiant.koehntopp.de.Escape character is '^]'.POST /~kris/test.php HTTP/1.0Host: valiant.koehntopp.deReferer: http://www.attacker.com/die_sucker_die.htmlContent-Type: application/x-www-form-urlencodedContent-Length: 16b=this+is+a+testHTTP/1.1 200 OKDate: Sat, 08 Apr 2000 06:55:11 GMTServer: Apache/1.3.9 (Unix)  (SuSE/Linux) PHP/4.0RC2-devmod_ssl/2.4.7 OpenSSL/0.9.4X-Powered-By: PHP/4.0RC2-devConnection: closeContent-Type: text/htmlThe value of b is this is a testThe value of HTTP_REFERER ishttp://www.attacker.com/die_sucker_die.htmlConnection closed by foreign host.