The DNS is essential for communication
Therefore every connection to the internet passes through a DNS query. Computer users depend on DNS to connect to applications, website and various resources in a network. Malware applications also rely on DNS to send information to their control servers to manipulate your data in whatever way they are meant to achieve that.
DNS firewall secures computers
To avoid malware threats, network administrators need to secure their DNS server. This accomplished by turning, the DNS server into a threat preventing DNS Firewall. With the DNS firewall, administrators ensure that their users safely connect to the internet and simultaneously preventing them from potential attacks on their data. It ensures that the network is not a botnet for criminal activities.
How DNS firewall works
It hinders a computer system from making communication with potentially harmful external resources. Firewall stops threats by keeping and updating a database of IP addresses and domains that it considers a threat. It then intercepts any malicious and unsolicited traffic from the computer network so that they are monitored, blocked or forwarded to secure locations.
A user's computer acts as a client sending request packets to other computers termed servers and awaits a response. While making a request, the firewall prevents incoming and allows outgoing connection from the computer. It also blocks requests sent by malicious programs from making requests from a user's computer. The firewall protects the computer and the important private information in it.
A good DNS protector inspects both incoming and outgoing connections. Additionally, the DNS firewall keeps a record of which program initiates each connection. The DNS protector uses this data to secure a computer without interfering with the computer usage. The only disadvantage of a firewall especially the advanced types is that they utilize a lot of processor and network resources and this can slow down a computer. Compared to the security offered, this disadvantage is nothing to worry about.
Advantages of DNS firewall
DNS prohibits communications with identified threats and future ones based on risk monitoring. They prevent malicious programs from contacting their home servers, preventing destruction to data and theft of data that may have bypassed other security platforms installed in a computer. Firewalls are capable of reporting and showing blocked DNS queries. They can recognize affected computers facilitating secure solutions. Users can set DNS firewalls to block any communication from certain defined geographical regions. It allow users to develop and manage security strategies. Users can define security policies by selecting threat types and even creating a list of domain names and IP addresses they wish to block