DNS or Domain Name System has on one hand made it possible for the Internet to be used by the mass and grow at a rapid pace and on the other hand it has opened up a serious flaw in the system that can be exploited by those with mal intentions. DNS has been the target of hackers for ages now and every year there are new variations of attacks coming up. If we start ranking the various processes used by hackers to exploit the DNS vulnerability, DNS Spoofing will probably be among the top most used techniques.

DNS spoofing is also normally known as DNS cache poisoning. Before we delve further into the process of the attack, it is better to know how the DNS works. Every website has a specific IP address which corresponds to the IP address of the server that has the copy of the website stored. The domain name is the name of the website that is understood by human beings and can be easily remembered and recognized. Each name corresponds to a specific IP address. This forms the Domain Name System. Whenever a domain name is entered into the browser, the domain name server provides the IP address corresponding to the specific domain name and links the user to the webpage.

While the process is simple and brilliant, it presents a major flaw. If the domain name server record is modified in any way then the desired website IP address will not be found and the user will be returned an incorrect response. DNS Spoofing attack does just the same. In DNS spoofing an unauthorized person changes the record of the DNS and the IP address recorded on the server is modified so that the visitor is taken to the desired website as per the attacker’s choice.

How can DNS protection help?

DNS protection means adding a layer of security to protect the DNS server from such attack. It basically prevents any unauthorized access to the server and thus prevents any corruption of the data within the server.

Any major organization in today’s world owns their own server which is key to maintaining privacy of the data collected within the organization. This server may be located at the organization or might be remotely located and accessed using the cloud network. Whichever be the case, DNS security is a major issue that needs to be looked into. Building DNS firewall is one way of guaranteeing that no malware enters the server network and modifies the data on the server.

Another process is to integrate DNS and DHCP to ensure that only the computers having authenticated IP address can access the server network and perform operation. This also makes it possible to give different status to different computers and granting complete administration access to only selected few computers using dedicated static IP addresses.

Finding the right DNS security is an essential step towards ensuring better network security and preventing security breaches. With growing number of DNS attacks it is always better to be safe than to be sorry.

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