Home/ Questions/Q 1099479
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-17T00:44:33+00:00

This is not language specific. What are the best methods to limit how many

  • 0

This is not language specific. What are the best methods to limit how many times a person may submit a web form, not knowing any info about that person. Example: Voting for the all star game online, only allowed 1 per 24 hour cycle. Something where you don’t have to “log in”. My thoughts were:

  • Use Captcha to keep bots at bay
  • Drop a cookie that expires in 24 hours
  • Check IP address if no cookie present (How many people are going to get banned because of NAT using this technique)
  • Anything I’m missing?
Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    Very good technique is to use Flash cookie. Many people clears cookies or uses different browsers. Flash cookies are cross-browser: they have same value across all browsers in your system, and people often doesn’t know they exist.

    How it works you can check here:

    http://www.nuff-respec.com/technology/cross-browser-cookies-with-flash

    Cookie and IP are of course also worth checking, but cookies don’t block cheating, and IP blocks NAT users.

    • 0