Blacklist

Blacklist is list of items, such as usernames or IP addresses, that are denied access to a certain system or protocol. 

what is black list
  

When a blacklist is used for access control, all entities are allowed access, except those listed in the blacklist.

The opposite of a blacklist is a whitelist, which denies access to all items, except those included in the list.

Blacklists have several applications in computing:



1) Web servers often include a blacklist that denies access from specific IP addresses or ranges of IPs, for security purposes.

2) Firewalls may use a blacklist to deny access to individual users, systems located in certain regions, or computers with IPs within a certain subnet mask.

3) Spam filters often include blacklists that reject certain e-mail addresses and specific message content.

4) Programmers may implement blacklists within programs to prevent certain objects from being modified.



Since blacklists deny access to specific entities, they are best used when a limited number of items need to be denied access.

When most entities need to be denied access, a whitelist approach is more efficient.


Thank you for reading!

 To checkout the latest discounts,  CLICKHERE

  To download our app for Android,  CLICKHERE



Comments

Popular posts from this blog

WEEKEND SPECIAL OFFERS

THE PEOPLE IN KERELA ARE FIGHTING WITH THEIR LIFE'S TO SURVIVE THEIR AND IT IS REALLY AN DIFFICULT SITUATION WHICH WE CAN'T EVEN IMAGINE.

QUALCOMM HAS OFFICIALLY ANNOUNCED LATEST PREMIUM TIER FLAGSHIP, THE QUALCOMM SNAPDRAGON 855 MOBILE PLATFORM, AND VIVID 5G EXPERIENCES.