https://forums.millisecond.com/Topic6448.aspx
RE: Web Research, Subject ID, Ip address tracking, http-referer, dropout
web researchip addresshttp referersubjecttracking
https://www.geeklog.net/forum/viewtopic.php?showtopic=40154
HTTP_REFERER Referals - Geeklog
Geeklog, the open source content management system designed with security in mind.
http referergeeklog