- Access control
- Using User Authentication (www.apacheweek.com)
- htaccess quick reference by Mikeneko (, Added 2008/4/10)
- Using User Authentication (www.apacheweek.com)
- mod_security
- mod_securityでWebサーバを守る by SofTek (, added 2007/1/22)
- mod_security by atmarkit.co.jp (, added 2007/1/22)
- mod_securityでWebサーバを守る by SofTek (
- captchas
- www.captcha.net, samples in captchas (added 2007/2/5)
- mod-captcha (added 2008/4/10)
- captchas by wikipedia (, added 2007/2/5)
- Captcha_Plugin (, added 2007/2/5)
- CAPTCHA解読ソフトの価格表に見るCAPTCHAのレベル差 (, added 2008/3/14)
- CAPTCHAとスパマー (, added 2008/3/14)
- はてなのCAPTCHA論争 (, added 2008/3/14)
- ウェブ脆弱性対策のチェックポイント by IPA (, added 2007/2/23)