AntiTrader
AntiTrader provides an easy solution to the problem of password theft and trading. AntiTrader will sit and watch the traffic on protected areas of your web site quietly and transparently in the background.AntiTrader will watch every hit from every member who's logged in and counts their Class C subnets. AntiTrader watches subnets as well as IP addresses. If the number of subnets a user accesses the site from exceeds a configurable amount in a set time period, AntiTrader kicks in with your preset instructions. You have the option of setting AntiTrader to either notify you by E-mail, automatically disable the abused ID or do both and it will do it automatically.