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{"id":774,"date":"2021-07-17T19:28:32","date_gmt":"2021-07-17T19:28:32","guid":{"rendered":"https:\/\/www.wikitechy.com\/interview-questions\/?p=774"},"modified":"2021-09-11T07:02:24","modified_gmt":"2021-09-11T07:02:24","slug":"what-is-whitelist","status":"publish","type":"post","link":"https:\/\/www.wikitechy.com\/interview-questions\/networking\/what-is-whitelist\/","title":{"rendered":"What is whitelist ?"},"content":{"rendered":"<div class=\"TextHeading\">\n<div class=\"hddn\">\n<h2 id=\"what-is-whitelist\" class=\"color-pink\" style=\"text-align: justify;\">What is whitelist ?<\/h2>\n<\/div>\n<\/div>\n<div class=\"Content\" style=\"text-align: justify;\">\n<div class=\"hddn\">\n<ul>\n<li>A\u00a0<a href=\"https:\/\/www.wikitechy.com\/technology\/whitelisting-in-modsecurity\/\" target=\"_blank\" rel=\"noopener\">whitelist<\/a>\u00a0is a list of e-mail addresses or domain names from which an e-mail blocking program will allow messages to be received.<\/li>\n<li>The list can be gradually compiled over a period of time, and can be edited whenever the user wants.<\/li>\n<li>When a whitelist is used, all entities are denied access, except those included in the whitelist.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<div class=\"ImageContent\" style=\"text-align: justify;\">\n<div class=\"hddn\"><img decoding=\"async\" class=\"img-responsive center-block\" src=\"https:\/\/cdn.wikitechy.com\/interview-questions\/networking\/what-is-whitelist.jpg\" alt=\"What is Whitelist\" \/><\/div>\n<\/div>\n<div class=\"TextHeading\" style=\"text-align: justify;\">\n<div class=\"hddn\">\n<h2 id=\"examples-of-different-whitelist-applications\" class=\"color-green\">Examples of different whitelist applications<\/h2>\n<\/div>\n<\/div>\n<div class=\"Content\">\n<div class=\"hddn\">\n<ul>\n<li style=\"text-align: justify;\">A network administrator may be configure a firewall with a whitelist that allows only specific IP addresses to access the network.<\/li>\n<li style=\"text-align: justify;\">A protected directory within a website uses whitelist for the purpose of provide limit access to certain IP addresses.<\/li>\n<li style=\"text-align: justify;\">Some\u00a0<a href=\"https:\/\/www.wikitechy.com\/view-article\/send-email-in-php\" target=\"_blank\" rel=\"noopener\">e-mail system<\/a>\u00a0users use whitelist for receiving only accept messages from the e-mail addresses.<\/li>\n<li style=\"text-align: justify;\">Programmers can use whitelists within a program to ensure only certain objects are modified.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Answer : A whitelist is a list of e-mail addresses or domain 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