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The draft "A Framework for IP based Virtual Private Networks"
<draft-gleeson-vpn-framework-01.txt> has been updated. It is
and should shortly be available in the Internet Draft directories.
It has been updated to reflect and reference some of the vpn related
work done since the previous version, notably the VPN-ID draft
<now draft-ietf-ion-vpn-id-00.txt>, and a number of specific VPN
proposals (a number of which were presented at the last IETF). It
also covers extranets and discusses the issues surounding
voluntary tunneling in considerably more detail. As before, the
intent is that this should provide a framework for discussion of
the vpn related standards work needed by the IETF. Unfortunately
there is no VPN WG as such in which to discuss the draft and some
of the issues it raises, however we intend to submit the draft for
publication as an Informational RFC, and would welcome any comments
anyone may have.
One issue in particular that is raised in the draft and that has
been the focus of some recent L2TP/IPSEC mailing list activity is
that of the the protocol stack to be used for secure remote access
using voluntary tunneling (i.e. choice of PPP/L2TP/UDP/IPSEC/IP,
or IPSEC/IP with the "xauth" extensions, or PPP directly over IPSEC,
or perhaps some other combination). Right now there are quite a
number of proprietary client solutions commercially available,
so this area is one that would certainly benefit from some work
in order to allow for interoperable implementations.