Telecommunication

Domain Name System Problems

Challa Chaitanyakeerthi

IT - 640

Domain Name System(DNS) is a hierarchical naming system for computers, services or any resource connected to the internet or a private network. We collectively use it many times a day ,often without even knowing that it exists. For enterprises, its their digital identity as well as a critical component of their security architecture.

Shortcomings of Domain Name Systems

1. Cache Poisoning

At whatever point a DNS server does not have the response to an inquiry inside of its cache, the DNS server can pass the question onto another DNS server in the interest of the customer. On the off chance that the server passes the question onto another DNS server that has off base data, whether set there purposefully or accidentally, then cache poisoning can happen. Noxious cache poisoning is ordinarily alluded to as DNS ridiculing .

2.  Client Flooding

Client flooding happens when a client system conveys a question, yet gets and acknowledges a huge number of DNS reactions from the aggressor. The assault's prosperity is endless supply of verification of these reactions. The assault is made to show up as though it is starting from the normal name server, yet without solid validation, the client does not have the ability to check the reaction's beginning [SPAF]. This assault can be utilized rather than DNS spoofing when endeavoring to host name parody an application [CHES].

3.  Information Leakage

Different dangers to the DNS incorporate zone exchanges that can leak information concerning inside systems to a potential assailant. Every now and again, host names can speak to venture names that may be of interest or uncover the working system of a machine [CHAP]. Blocking zone exchanges ends up being a purposeless exertion in anticipating such leaks of information....