×書き込めない
POST /test/bbs.cgi HTTP/1.1
Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, */*
Referer: http://etc.2ch.net/test/read.cgi/qa/1062802858/l50
Accept-Language: ja
Content-Type: application/x-www-form-urlencoded
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)
Host: etc.2ch.net
Content-Length: 98
Pragma: no-cache
Cookie: PON=***************; NAME=; MAIL=
Connection: keep-alive

○書き込める
POST /test/bbs.cgi HTTP/1.1
Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, */*
Referer: http://etc.2ch.net/test/read.cgi/qa/1062802858/l50
Accept-Language: ja
Content-Type: application/x-www-form-urlencoded
User-Agent: Monazilla/1.0 (compatible; MSIE 6.0; Windows NT 5.0)\r\n";
Host: etc.2ch.net
Content-Length: 98
Pragma: no-cache
Cookie: PON=***************; NAME=; MAIL=
Connection: keep-alive

※変更点はユーザエージェントのみ