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.
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.
