IP Security. P R E S E N T E D B Y ::: Semester : 8 ::: Year : 2009 Naeem Riaz Maria Shakeel Aqsa Nizam.

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Presentation transcript:

IP Security

P R E S E N T E D B Y ::: Semester : 8 ::: Year : 2009 Naeem Riaz Maria Shakeel Aqsa Nizam

BEYOND FORWORD COMPETITIVE ANALYSIS FUCTIONAL FEATURES INITIATIVE

BEYOND FORWORD COMPETITIVE ANALYSIS FEATURES INITIATIVE Overview at a glance

IPSecurity (IPSec) IPSecurity (IPSec) is a collection of protocols designed by the Internet Engineering Task Force (IETF) to provide security for a packet at the network level.

TCP/IP protocol suite and IPSec

IP Security Scenario

Benefits of IPSec  Strong security that can be applied to all traffic crossing the perimeter.  Transparent to applications.  No need to change software on a user or server system, - When IPSec is implemented in a router or firewall.  IPSec can be transparent to end users.  There is no need to train users on security mechanisms  IPSec can provide security for individual used if needed.

Cryptographic algorithms Cryptographic algorithms defined for use with IPsec include:  HMAC-SHA1 for integrity protection  TripleDES-CBC for confidentiality  AES-CBC for confidentiality.

RFC : IP Sec Documents  RFC 2401: An overview of security architecture  RFC 2402: Description of a packet encryption extension to IPv4 and IPv6  RFC 2406: Description of a packet emcryption extension to IPv4 and IPv6  RFC 2408: Specification of key managament capabilities

INITIATIVE BEYOND FORWORD COMPETITIVE ANALYSIS FUNCTIONAL FEATURES Modes Protocols

Modes of IPSec IPSec operates in one of two different modes.  Transport mode.  Tunnel mode

TRANSPORT MODE VS TUNNEL MODE  IPSec in the transport mode does not protect the IP header; it only protects the information coming from the transport layer.  IPSec in tunnel mode protects the original IP header.

Transport mode in action

Tunnel mode in action *

Authentication Header (AH) Protocol & Encapsulating Security Payload (ESP) Protocol  The Authentication Header (AH) Protocol provides source authentication and data integrity but not privacy.  Encapsulating Security Payload (ESP) provides confidentiality services (Must) and authentication services (optionally).  ESP provides sources authentication, data integrity and privacy

BEYOND FORWORD COMPETITVE ANALYSIS INITIATIVE FUNCTIONAL FEATURES Key management IPSec services

Summarization of AH and ESP *

Key Management IPSec architecture support for two type of key management:  Manual: Particular for small, relatively static environments.  Automated: The use of this key in a large distributed system with an evolving configuration

Contd… Oakley: Key Detemination Protocol: Three authentication methods can be used with Oakley: - Digital signatures -Public-key encryption -Symmetric-key encryption ISAKMP: Internet Security Association and Key Management Protocol: - Defines procedures and packet formats to establish, negotiate, modify and delete security associations.

IPSec Services IPSec provided Services for:  networking devices, -such as a router or firewall  Operates on the workstation or server. - Workstation to Workstation  Protection against data changes -Accidental or Intentional  Datagram’s Content can be hidden.

INITIATIVE FUNCTIONAL FEATURES COMPETITIVE ANALYSIS BEYOND FOREWORD THANK YOU Software implementations Real life examples

IPSec: Real Life Examples IPSec provides the capability to secure communications across a LAN, across private and public WANs, and across the Internet. Examples of its use include:  Secure branch office connectivity over the Internet  Secure remote access over the Internet  Establishment of extranet and intranet connectivity with partners  Enhancement of electronic commerce security  Encrypt or authenticate all traffic at the IP level

Contd… Using IPSec all distributed applications can be secured, -Remote logon, -client/server, - , -file transfer, -Web access

SOFTWARE IMPLEMENTATIONS  NRL IPsec, one of the original sources of IPsec code.  OpenBSD, with its own code derived from a BSD/OS implementation written by John Ioannidis and Angelos D. Keromytis in  The KAME stack, that is included in Mac OS X, NetBS and FreeBSD.  "IPsec" in Cisco IOS Software  "IPsec" in Microsoft Windows, including Windows XP, Windows 2000, Windows 2003, Windows Vista, Windows Server 2008, and Windows 7.  SafeNet QuickSec toolkits  IPsec in Solaris

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