How to secure PPPOE network

hi everybody,

kindly, how can i secure my PPPOE network from the program cain & abel , there is someone is stolen my users and passwords

thanks…

http://forum.mikrotik.com/t/how-to-prevent-snifir-programs/28097/1
In profiles do not select PAP authentication and also encrypt PPPoE

Use layer 2 isolation wherever possible.