Plugging DHCP Security Holes Using S-DHCP

Abstract

Dynamic Host Configuration Protocol(DHCP) allows the terminals to have IP address for their introduction in to the network. In this paper, a secure DHCP system is proposed, not only for user authentication but also for addressing the other security issues like confidentiality, integrity and privacy. Proposed S-DHCP, makes use of the users legitimate right for an IP address such that legitimate user on a particular terminal can exercise it’s right to get allocated and use an IP address from S-DHCP. Thus S-DHCP protects unauthenticated and unauthorized access of confidential informationat one hand which keeping their integrity intact in a private mode from within the network to the outside world over Internet. Simulation and preventing the fabrication of IP addresses and MAC addresses leading to unauthorized access control is difficult and our effort is to incorporate session-ID for user authentication without any modification on DHCP client to produce the desired result.This paper attempts to introduce proposed S-DHCP, its principle, to plug vulnerabilities and other efforts on optimization over the design of protocols in a secured environment.