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IP Security

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

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IP Security

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  1. IP Security

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

  3. INITIATIVE COMPETITIVE ANALYSIS BEYOND FORWORD FUCTIONAL FEATURES

  4. FEATURES INITIATIVE BEYOND FORWORD COMPETITIVE ANALYSIS Overview at a glance

  5. 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.

  6. TCP/IP protocol suite and IPSec

  7. IP Security Scenario

  8. 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.

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

  10. 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

  11. FUNCTIONAL FEATURES INITIATIVE BEYOND FORWORD COMPETITIVE ANALYSIS Protocols Modes

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

  13. 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.

  14. Transport mode in action

  15. Tunnel mode in action *

  16. 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

  17. INITIATIVE COMPETITVE ANALYSIS BEYOND FORWORD FUNCTIONAL FEATURES IPSec services Key management

  18. Summarization of AH and ESP *

  19. 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

  20. 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.

  21. 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.

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

  23. 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

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

  25. 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 1996. • 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

  26. Asking queries is your right! Computers are useless, they can only give you answer.

  27. T H A N K Y O U

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