On Thursday 06 November 2008 14:07:41 ext Christian Vogt, you wrote:
> (2) On requirements 1 and 3:
>
> REQ-1: A NAT MUST have an "Endpoint-Independent Mapping"
> behavior for DCCP.
>
> REQ-3: If application transparency is most important, it is
> RECOMMENDED that a NAT have an "Endpoint-independent filtering"
> behavior for DCCP. If a more stringent filtering behavior is
> most important, it is RECOMMENDED that a NAT have an
> "Address-dependent filtering" behavior.
>
> These requirements are general and not specific to DCCP. Would it
> make sense to specify them in a separate RFC for NATs in general,
> independent of any specific transport protocol?
Whether it's of any use depends on the connection model (or lack thereof) of
the transport protocol. I don't want to presume that this would make sense
for all future transport protocols. In fact, it does not make sense for
multicast UDP(-Lite) to me - which has its own document.
> (3) On requirement 6:
>
> REQ-6: If a NAT includes ALGs, it MUST NOT affect DCCP.
>
> This requirement is not 100% clear. I am assuming it means: "If a
> NAT includes ALGs, the NAT MUST NOT affect DCCP packets that are
> processed by one of those ALGs." Suggest to reword the requirement
> in this way.
This reads worse to me. An ALG cannot "process" DCCP packets if it does not
affect in any way. There is already a IESG discuss on this. What about this?
REQ-6: If a NAT includes ALGs, they MUST NOT affect DCCP.
--
Rémi Denis-Courmont
Maemo Software, Nokia Devices R&D
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