In this article we will discuss IPSec, will make brief discussion on IPSec, In last article we discuss about ICMP.

The IP security (IPSec) is an Internet Engineering Task Force (IETF) standard suite of protocols between 2 communication points across the IP network that provide data authentication, integrity, and confidentiality. It also defines the encrypted, decrypted and authenticated packets.

Internet Protocol Security is a secure network protocol suite that authenticates and encrypts the packets of data sent over an Internet Protocol network. It is used in virtual private networks.

Internet Protocol security (IPsecuses cryptographic security services to protect communications over Internet Protocol (IP) networks. IPsec supports network-level peer authentication, data-origin authentication, data integrity, data confidentiality (encryption), and replay protection.

IPSec is a protocol that’s designed to protect individual TCP/IP packets traveling across your network by using public key encryption. In a nut shell, the source PC encapsulates the normal IP packet inside of an encrypted IPSec packet. IPSec and SSL are the two most popular secure network protocol suites used in Virtual Private Networks, or VPNs. IPSec and SSL are both designed to secure data in transit through encryption.

IPsec delivers the following benefits: Reduced key negotiation overhead and simplified maintenance by supporting the IKE protocol. IKE provides automatic key negotiation and automatic IPsec security association (SA) setup and maintenance.

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