http://www.squidguard.org/
http://www.hidanet.ne.jp/~haya/squidguard.html
https://www.stackasterisk.jp/tech/systemConstruction/squidGuard01_01.jsp
http://www-6.ibm.com/jp/developerworks/linux/001013/j_schools.html
http://www.geocities.com/juggling_zou/jsquidGuard.html
http://opentechpress.jp/developer/07/03/05/0116208.shtml