What is DNS?
DNS or Domain Name System is the process of associating names that can be understood by human beings to the various web page addresses. Every web page has a specific IP address. This is a combination of a series of few numbers which happens to be unique for each one of them. Whenever we wish to visit any website the computer sends a request for the web page using this address. However, remembering sets of numbers for each website is humanly impossible. Thus, DNS makes the task easy by masking these numbers behind a name which is far easier to remember. Whenever the name of the website is typed, it is converted to the respective address and the web page is fetched. The name of the website and their corresponding address is maintained in a database which forms the backbone of DNS. All communication happens through this database and the right website is fetched.
Why do I need DNS protection?
Even though immensely helpful and important in the communication through the Internet, DNS is essentially highly vulnerable. The security measures are not intrinsically built and unless there is considerable protection being provided, DNS hacking or exploitation cannot be countered. When the DNS under attack is that of some financial service website such as bank or any other financial institution or any website that asks for financial information from the user in lieu of service provided by them, there is lot more at stake and can cause major financial loss to the users palling prey to the exploit. DNS protection prevents such exploits to a large extent.
What are the various types of DNS attacks?
DNS exploits can happen in a number of ways. Here is a brief list of some of the most popular DNS attacks that have surfaced over the years.
– DoS or Denial of Service is one of the most common of all DNS attacks. It is also pretty much unstoppable if there is no security measure employed filtering out unauthorized access. This attack basically takes advantage of the recursive behavior of DNS which happens normally. Recursive resolution is reserved for only internal queries. For all external queries authoritative nameserver is responsible. In DoS attack this entire functionality is disrupted and results in no service to external clients.
– DNS Cache Poisoning is among the most serious attacks that take place. This attack leads unsuspecting visitors of the website to a malicious site. The main target is to get confidential data from the unsuspecting users and use them for other purpose. An attack of this form on any financial institution’s website can has a devastating effect as it will give the perpetrator access to confidential financial information of the clients.
DNS Protection Methods
The most effective of all DNS protection is constant monitoring and detection of malicious activities across the network. It is not possible by any person to maintain such round the clock monitoring activity, which is why DNS protection mechanisms need to be put in place. Automated systems are far more effective in providing high DNS security and prevent most attacks.