[SIPForum-discussion] RPID in ACK

[Dương Văn Tiến]

i want to have document about SIP security. And how SIP work, how SIP
secure. And SIP have more advance than H.323 ?

2008/6/25 yasser elazab <yasserelazab at hotmail.com>:

>
>
> --------------------------------------------------
> From: "Raj Jain" <rj2807 at gmail.com>
> Sent: Wednesday, June 18, 2008 1:14 PM
> To: <raghul82 at yahoo.co.uk>
> Cc: <discussion at sipforum.org>
> Subject: Re: [SIPForum-discussion] RPID in ACK
>
> > On Tue, Jun 17, 2008 at 6:23 PM, Raghul Prasanna <raghul82 at yahoo.co.uk>
> > wrote:
> >>  I have a scenario were calls to Verizon are getting rejected. When I
> >> looked
> >> at the ethereal I found that we are sending ACK to 200 OK from Verizon.
> >> But
> >> they keep sending us 200 OK and we respond to it everytime and finaly
> >> they
> >> time out.
> >>
> >>
> >>
> >>  When I checked with Verizon they said that we dont send RPID in ACK. I
> >> have
> >> never come across this scenario were RPID needs to be sent in ACK. I
> >> thought
> >> its sent in Invite message which we do.
> >>
> >>
> >>
> >>  Does anyone know if there is any spec which states that RPID shd be
> sent
> >> in
> >> ACK?
> >
> > RPID is a long expired internet-draft. Here is a link to the draft:
> > http://tools.ietf.org/id/draft-ietf-sip-privacy-04.txt. The table in
> > section 6 in this shows that the header is not defined for the ACK
> > method. I doubt that RPID missing in the ACK is the reason why you've
> > 200/ACK retransmissions. Typically, you have these retransmission
> > problems due to messages not reaching the destination or
> > transaction/dialog mismatching.
> >
> > --
> > Raj Jain
> > _______________________________________________
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