DNS stands for domain name system. The idea behind DNS filtering is to block malicious websites and filtering the harmful or inappropriate content. It helps in maintaining and securing companies data. Often DNS is considered as a part of a larger access control strategy.
What is the Domain Name System (DNS)?
DNS is the phonebook of the Internet. Like we humans, access data online through domain names, e.g numberseven.com, oshoinfotech.com etc., web browsers interact through Internet Protocol (IP) addresses. DNS translates domain names to IP addresses so browsers can load Internet resources.
Domain name system or DNS help keep malware and other malicious software out of your organization’s networks and off from user devices too. It also blocks any kind of phishing attacks.
Blocking malicious websites
Blocking phishing websites
A phishing website is a fake website that is set up to steal login details for phishing attacks. The domain may exactly look similar like an official domain that many users will not think to question. Irrespective of the process, the aim is to trick the user into giving his account credential to the attacker. All such kind of websites can be blocked by DNS filtering. These capabilities rely on the DNS filtering system to classify malicious IP addresses or domains as harmful. Although DNS filtering can block this malicious behavior, attackers create new domains very quickly and it cannot block all of them.
How does DNS filtering block prohibited content? The method of limiting access to those types of content is similar to the process mentioned above; IP addresses or domain names that are considered to host restricted content are block-listed and users will not able to access them. Also, company-approved websites may be added to the permit list, with DNS filtering blocking all other websites.