[SIPForum-discussion] RPID in ACK

[Fernando Canuto]

Helo All.

There is a book that's very interesting, the name is Securing Voip Networks
(Threats, Vulnerabilities and Countermeasures).

Who wrote it, were two gays They are Peter Thermos and Ari Takanen.

Fallow Below the url

http://www.amazon.com/Securing-VoIP-Networks-Vulnerabilities-Countermeasures/dp/0321437349

I Liked, because it has the simple until advanced topics for a secury
implemantation.

Bye.

2008/6/26 Samir Patni <samir_patni at persistent.co.in>:

>  Hi
>
>
>
> Few days back I came across a good document comparing SIP and H.323 for
> internet telephony by Dr. Henning Schulzrinne and Dr. Jonathan Rosenberg.
> Please find it below.
>
>
>
>
> http://sipforum.org/pipermail/discussion/attachments/20050715/499b84d3/attachment.obj
>
>
>
> Regards,
>
> Samir Patni
>
>
>  ------------------------------
>
> *From:* discussion-bounces at sipforum.org [mailto:
> discussion-bounces at sipforum.org] *On Behalf Of *Duong Van Ti?n
> *Sent:* Wednesday, June 25, 2008 9:58 PM
> *To:* yasser elazab
> *Cc:* discussion at sipforum.org
> *Subject:* Re: [SIPForum-discussion] RPID in ACK
>
>
>
> 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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> >
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>
> --
> Dương Văn Tiến - Trường Học Viện Công Nghệ Bưu Chính Viễn Thông
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>
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>


-- 
Fernando Canuto
Gerente de Engenharia de Redes
Networking – Technology Group
TMais S.A.
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