I have asp poll and i want to prevent multiple votes. I try with cookies and IP tracking but have no results. User simply delete cookies and reconnect (after disconnecting and connecting he get new IP adress) and he can vote again.Second solution I try is Request.ServerVariables("LOGON_USER"), (Request.ServerVariables("AUTH_USER"), Request.ServerVariables("REMOTE_USER") store them in database and block cheater. Problem is at my server administrator becouse he won't enable anonimus logon for security reason. What else can I do to prevent multiple votes. Sorry at my english, I hope you can understand my problem and found some solution.