[SIPForum-discussion] Query about IP Security

[Yogesh Agrawal]

Hi,

    What is the significance of "spi" directive  in the Security
headers?

 

e.g. Security-Client: digest, IPsec-3gpp
;alg=hmac-sha-l-96;spi-c=23456789 ;spi-s=12345678;port-c=2468
;port-s=1357

 

 

RFC 3329 says -   It defines the SPI number used for inbound messages
(10DIGIT; 0 to 4294967295)
 

John Wiley says - the SPI used for the IPsec SA that relates to the
protected client port (spi-c) as 

                            well as the SPI used for the IPsec SA that
relates to the protected server port

                            (spi - s).

 

Could you please elaborate on its significance  ?

 

 

Yogesh Agarwal | IMS| Tech Mahindra

9/7,Hosur road,Bangalore-29.

* Office:    91-80-2553 9233|  Extn:  1409       | Cell:9986512707  

Email: ayogesh at techmahindra.com

www.techmahindra.com <BLOCKED::http://www.techmahindra.com/> 

 



============================================================================================================================
 
Disclaimer:

This message and the information contained herein is proprietary and confidential and subject to the Tech Mahindra policy statement, you may review the policy at <a href="http://www.techmahindra.com/Disclaimer.html">http://www.techmahindra.com/Disclaimer.html</a> externally and <a href="http://tim.techmahindra.com/Disclaimer.html">http://tim.techmahindra.com/Disclaimer.html</a> internally within Tech Mahindra.

============================================================================================================================
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://sipforum.org/pipermail/discussion/attachments/20070614/5055a9cb/attachment-0002.html>