SIP messages in IPSec communication -


we have sip client (endpoint) , wanted integrate ipsec sip client. client sent security-client header server , server send security-server header client. in these messages, client , server sending spi-c , sip-s value each other further communication. please clarify me below questions ?

  1. do need two(i.e. server , client) spi values @ time of communication on udp or tcp ?
  2. at time of communication on ipsec how can share pre-shared key ?

from sip point of view -

to establish ipsec connection both endpoint share security attributes called security association (sa) contains multiple parameters.

  1. there 2 security associations, 1 client server , server client. each sa contains 1 spi. yes there 2 spi involved.

  2. ipsec uses ike (internet key exchange) key management. ike internally uses diffe hellman algorithm key exchange.

hope answers.


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