1. IPSec (IP Security) Tahir Hussain Tanmay Shah

2. outline introduction IPSec protocols scenarios conclusion

3. introduction designed by IETF “general” security applications remain unchanged optional for IPv4, mandatory for IPv6

4. IPSec protocols AH – Authentication Header ESP – Encapsulating Security Payload

5. ESP

6. scenario#1 many-to-one gate-way tunnel

8. ESP tunnel

13. CBR_Client packet sent vs. IPSec_in packet processed (30 packets sent & 30 packets processed)

14. Bytes Overhead (540 bytes overhead/gate way)

15. average end-to-end delay (s) 0.275 s for node 8

16. Scenario#2 one-to-many gate-ways tunnels

19. packet loss (0)

20. overhead (1610 bytes/ security gate way 2)

21. average end-to-end delay o.275 for node 6,7 &8

22. Scenario#3 nested tunnel

23. nested tunnel

24. Overhead node 3-6 – tunnel one & node 4-5 – tunnel two

25. conclusion tunnel increases the packet overhead high throughput – high security delay distributes per tunnel

26. References http://www.scalable- networks.com/publications/documentation/mod el_specs.php Qualnet model library agenium_QualNet_Libraries_web.pdf