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What is whitelist ?

  • A whitelist is a list of e-mail addresses or domain names from which an e-mail blocking program will allow messages to be received.
  • The list can be gradually compiled over a period of time, and can be edited whenever the user wants.
  • When a whitelist is used, all entities are denied access, except those included in the whitelist.
What is Whitelist

Examples of different whitelist applications

  • A network administrator may be configure a firewall with a whitelist that allows only specific IP addresses to access the network.
  • A protected directory within a website uses whitelist for the purpose of provide limit access to certain IP addresses.
  • Some e-mail system users use whitelist for receiving only accept messages from the e-mail addresses.
  • Programmers can use whitelists within a program to ensure only certain objects are modified.
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