Several persons in a company use the local LAN for most of their communication & data transfer. The local LAN has several unsecured protocols & services i.e. FTP, Telnet etc. Persons who exchange highly confidential & sensitive information need a secure system on local LAN for secure communications. This paper describes the Internet Protocol Security (IPSec) & how IPSec framework can be used for secure & private communications over Internet Protocol, in local LAN environment. This paper also describes the various Protocols used in IPSec, Security Architecture of IPSec & various modes of operations in IPSec.

Internet Protocol Security (IPSec), Internet Key Exchange (IKE), Virtual Private Network (VPN).

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