Bruce Lowekamp wrote:
Ari Keranen wrote:
Bruce Lowekamp wrote:
Henry Sinnreich wrote:
On 6/27/08 11:07 AM, "Eric Rescorla" <[EMAIL PROTECTED]> wrote:
As Bruce indicated in a previous message, HIP needs a rendezvous
service,
and a generic P2P overlay like RELOAD can provide such a service.
In that
respect, HIP would be a client of RELOAD, even if RELOAD itself ran
over ordinary IP.
-Ekr
HIP has been defined with a rendezvous server (RVS) in the HIP
Rendezvous
Extension RFC 5204. Actually, one of the nicer properties is the
flexibility, since any node can act as a rendezvous server; that's
more than
SIP can do.
What am I missing?
Locating a capable (non-NATed) rendezvous server in a distributed
environment without a centralized service provider is itself a
non-trivial problem.
Additionally, even if you have obtained a rendezvous server, you
still need a registration server (RFC5203).
Actually, in HIP you don't need a separate "registration server" to
get rendezvous service but you use the registration extension
(RFC5203) to register to the service. And for the NATed case you
should use HIP relay service, i.e., instead of forwarding just the I1
as in RVS, whole base exchange is done trough the relaying service.
This service can be provided by a relay server [1] or, e.g., a P2PSIP
overlay [2].
I think we must be in violent agreement, modulo a bit of terminology.
Labeling 5203 as defining a "registration server" is a bit of an
oversimplification, but I think accurately identifies one of the roles
the overlay would have to fulfill. And draft-ietf-hip-nat-traversal
merely identifies HIP relay as another role (ice aware) for a rendezvous
server.
I probably should have pointed to rfc5205 as well.
Anyway, the entire purpose of my email was to point out that something
needs to fulfill these two roles, and as suggested by hip-bone and
others, a p2psip overlay is well-suited for the job, particularly in an
ad hoc environment (no provisioned servers or dns). I think we both
agree on that.
Yes, we fully agree on that. I was just worried that some people on the
list might get the impression that you need two different servers just
to get the rendezvous service. Thanks for clarifying.
Cheers,
Ari
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