Information Leakage Prevention in IPsec VPN

Virtual Private Networks are most widely used in all over the world. According to VPN it is considered that the networks are secure. But in all cases there are some loop holes to penetrate into it. So in this paper we discussing about the most dangerous loop holes namely the covert channels. There are a lot of research is done in the field of covert channels. But all works are not practically implemented to get an idea of how to prevent the covert channel. In this we are specifying the threat model and using some algorithms to prevent the covert channels. By the use of this concept we can completely prevent the information leakage (almost 90 %).