Re: [BEHAVE] [v4tov6transition] Any Experience with Using

[Fred Baker <fred@cisco.com>]

Behave's	StatelessNAT-PT for IMS-SIP VoIP Application...
Mime-Version: 1.0 (Apple Message framework v1081)
Cc: "'Behcet Sarikaya'" <sarikaya@ieee.org>,
        "'Cameron Byrne'" <cb.list6@gmail.com>,
        "'Hui Deng'" <denghui@chinamobile.com>, v6ops@ops.ietf.org,
        behave@ietf.org, "'Mosley, Leonard'" <len.mosley@twcable.com>
Message-Id: <0F1D6CA3-F978-4984-90B3-CE6701BDB457@cisco.com>
References:
<AANLkTin1gQhnS=w4+ehLyJOyO+mz0NNnz-4rD-N97ZEq@mail.gmail.com>
<EC91E98C3BC6A34B917F828067B9335C1535E733DE@PRVPEXVS07.corp.twcable.com>	<005301cb5a6f$75490320$5fdb0960$@com>
<AANLkTi=+Fx4c6UvcBi3GO2U2Cg9y7EkkTcmyO2q_YQ6t@mail.gmail.com>
<576604.55924.qm@web111407.mail.gq1.yahoo.com>
<179c01cb5ac3$db7a77b0$926f6710$@com>
To: Dan Wing <dwing@cisco.com>
X-Mailer: Apple Mail (2.1081)
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: quoted-printable
Sender: owner-v6ops@ops.ietf.org
Precedence: bulk
List-ID: <v6ops.ops.ietf.org>


On Sep 22, 2010, at 7:05 PM, Dan Wing wrote:

>> Cameron, NAT64 also requires ALGs.
>=20
> No, only for protocols that don't do their own NAT traversal.=20

If we agree that some don't, then you are agreeing with each other. =
Protocols that do their own NAT traversal (anything that keeps =
application layer stuff at the application layer and network layer stuff =
at the network layer) are fine. Protocols that mix the two - FTP, SIP, =
perhaps SMTP, etc - require some form of ALG or proxy to fix up the =
application layer stuff. Simplest approach is an application that speaks =
IPv6 on one side and IPv4 on the other and terminates the sessions, such =
as an SMTP MTA; if relays don't exist, it gets messy, but then the NAT =
world has always been messy.=