[SIPForum-discussion] rport and received parameter in Via header

[Gnana Guru Natarajan]

Hi,

       What is the purpose of rport and received parameter in sip via
header? Will it be needed if sip client is behind NAT router? If so, how
router can process this sip header as router only handle the IP header but
cannot application layer header?

Thanks,
Gnana Guru N.
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