[BEHAVE] Fwd: [nat66] Bar BOF in Stockholm?
Margaret Wasserman <mrw@sandstorm.net> Wed, 29 July 2009 10:26 UTC
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From: Margaret Wasserman <mrw@sandstorm.net>
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Subject: [BEHAVE] Fwd: [nat66] Bar BOF in Stockholm?
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Just FYI -- If you support the NAT66 work that I presented in this WG several months ago and would like to help us determine how to move forward, you may be interested in the "bar" BOF I am holding tonight. See below. Margaret > From: Margaret Wasserman <mrw@sandstorm.net> > Date: July 29, 2009 6:22:43 AM EDT > To: Margaret Wasserman <mrw@sandstorm.net> > Cc: "nat66@ietf.org Discussion" <nat66@ietf.org> > Subject: Re: [nat66] Bar BOF in Stockholm? > > > > This "Bar" BOF will be held in room 501. It will start ~5 minutes > after the end of the plenary (~7:30pm) and will last for about an > hour. I don't think that we will have a projector, and I'm not > planning for any presentations. > > Our strawman agenda (subject to change this evening) is: > > - Review status of NAT66 document (Margaret, 10 min) > Improvements needed: > - Extend mechanism to prefixes longer than /48 > - More clarity on issues with checksum correction in transport > layers > - Editorial improvements > > - Quick Reminder about Dave Thaler's SAF Presentation (Margaret, 5 > min) > > - How can we move ahead? (Discussion, 45 min) > > I have attached a strawman charter for a WG to do this work that we > can discuss if that makes sense. Or, perhaps we'll decide that > there is a better way to move forward than having an IETF WG? > > Margaret > > Network Address Translation for IPv6 (NAT66) > > Last Modified: July 29, 2008 > > Chairs: TBD > > Area Directors: TBD > > Area Advisor: TBD > > Mailing Lists: > > General Discussion: nat66@ietf.org > To Subscribe: https://www.ietf.org/mailman/listinfo/nat66 > Archive: http://www.ietf.org/mail-archive/web/nat66 > > Description of the Working Group: > > Due to its vastly explanded address space and allocation policies > that result in a large number of addresses being assigned to each > enterprise or residential site, IPv6 eliminates one of the primary > reasons for using a Network Address Translator (NAT), the > amplification of limited address space. Many of the other reasons for > using NAT can be better addressed using less damaging mechanism, as > described in RFC 4864, Local Network Protection for IPv6. > > However, IPv6 does not fully address one of the primary reasons > for NAT use in enterprise networks, address independence. In this > context, address independence refers to the use of internal enterprise > addresses with the following properties: > > o The IPv6 addresses in use inside the local network (for nodes, > ACLs, logs) do not need to be renumbered if the ISP changes a > site's external address prefix. > > o The IPv6 addresses in use inside the local network (for nodes, > ACLs, logs) do not need to be renumbered when a site changes > ISPs. > > o It is not necessary for an administrator to convince an ISP to > route his or her internal IPv6 addresses. > > This address independence requirement has been a primary driver for > IPv4 NAT deployment in medium to large-sized enterprise networks, > including NAT deployments in enterprises that have plenty of IPv4 > provider-independent address space (from IPv4 "swamp space"). As > explained in draft-carpenter-renum-needs-work-03.txt, we have not > fully eliminated the cost and complexity of renumbering in IPv6, so > the need for address independence is still driving demand for NAT in > enterprise IPv6 deployments. > > There are many well-understood problems caused by NAT deployment, many > of which relate to specific properties of IPv4 NAT devices including: > maintaining per-connections state in middleboxes, port mapping and > transport header modification for checksum correction. These > properties cause brittleness in the network, constrain innovation at > the transport layer, and interfere with security mechanisms that > encrypt the entire IP payload. It should be possible to avoid these > issues with a carefully designed IPv6 NAT mechanism. > > The NAT66 WG is chartered to document a NAT mechanism for IPv6 that > will avoid many of the problems caused by IPv4 NAT, while retaining > the address independence property that is needed for some enterprise > deployments. This work will be based on draft-behave-mrw-nat66-2.txt. > > Any form of address or prefix translation, including NAT66, involves > the modification of IP addresses in the network, causing a loss of > end-to-end transparency. The problems with modifying IP addresses in > the network are described in the IAB Considerations for UNIlateral > Self-Address Fixing (UNSAF) document, RFC 3424. In this document, the > IAB suggests that all mechanisms that translate addresses in the > networks should include an exit strategy/transition plan that will > restore end-to-end transparency. In order to provide an exit strategy > for those who need one, the NAT66 WG will also develop a mechanism for > Self-Address Finding (SAF) to restore end-to-end transparency. > > Milestones: > > Sep 2009: Charter WG > Nov 2009: NAT66 draft becomes a WG item > Mar 2010: SAF draft beomes a WG item > Apr 2010: NAT66 draft sent to IESG for publication as PS > Aug 2010: SAF draft sent to IESG for publication as PS > > > > > On Jul 23, 2009, at 12:23 PM, Margaret Wasserman wrote: > >> >> Do you support the refinement and publication of the NAT66 work? >> If so, would you be interested in holding a bar BOF in Stockholm to >> figure out how best to proceed towards that goal? Perhaps on >> Monday evening (at 7:40pm) or Wednesday evening (7:30pm)? >> >> If you would like to attend, please reply to me (preferably not the >> whole list) and let me know which time(s) will work for you: >> Monday@7:40pm, Wednesday@7:30pm, or both. I will attempt to >> schedule something for the time that most folks can attend, and >> I'll send the details back to the list. >> >> Margaret >> >> >> _______________________________________________ >> nat66 mailing list >> nat66@ietf.org >> https://www.ietf.org/mailman/listinfo/nat66 > > _______________________________________________ > nat66 mailing list > nat66@ietf.org > https://www.ietf.org/mailman/listinfo/nat66
- [BEHAVE] Fwd: [nat66] Bar BOF in Stockholm? Margaret Wasserman
- [BEHAVE] Fwd: [nat66] Bar BOF in Stockholm? Margaret Wasserman
- [BEHAVE] Fwd: [nat66] Bar BOF in Stockholm? Margaret Wasserman