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Re: [v6ops] draft-ietf-v6ops-icp-guidance WGLC

"Fred Baker (fred)" <fred@cisco.com> Tue, 07 August 2012 21:07 UTC

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From: "Fred Baker (fred)" <fred@cisco.com>
To: Mark ZZZ Smith <markzzzsmith@yahoo.com.au>
Thread-Topic: [v6ops] draft-ietf-v6ops-icp-guidance WGLC
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Date: Tue, 07 Aug 2012 21:07:56 +0000
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Cc: "v6ops@ietf.org" <v6ops@ietf.org>, V6ops Chairs <v6ops-chairs@tools.ietf.org>, Ron Bonica <ron@bonica.org>
Subject: Re: [v6ops] draft-ietf-v6ops-icp-guidance WGLC
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On Aug 7, 2012, at 1:31 PM, Mark ZZZ Smith wrote:

> According to RFC6145, 
> 
>    This document describes stateful NAT64 translation, which allows
>    IPv6-only clients to contact IPv4 servers using unicast UDP, TCP, or
>    ICMP.  One or more public IPv4 addresses assigned to a NAT64
>    translator are shared among several IPv6-only clients.  When stateful
>    NAT64 is used in conjunction with DNS64, no changes are usually
>    required in the IPv6 client or the IPv4 server.
> 
> So NAT64 wasn't designed for a scenario where IPv4-only clients contact IPv6 servers. 


Your quote is from RFC 6146, and you are correct with regard to stateful NAT64. 

RFC 6145, which is stateless and uses an IPv6 address that contains an embedded IPv4 address, is very much defined to enable bidirectional session initiation between systems with the stated type of address.

https://tools.ietf.org/html/rfc6052
6052 IPv6 Addressing of IPv4/IPv6 Translators. C. Bao, C. Huitema, M.
     Bagnulo, M. Boucadair, X. Li. October 2010. (Format: TXT=41849 bytes)
     (Updates RFC4291) (Status: PROPOSED STANDARD)

https://tools.ietf.org/html/rfc6144
6144 Framework for IPv4/IPv6 Translation. F. Baker, X. Li, C. Bao, K.
     Yin. April 2011. (Format: TXT=67181 bytes) (Status: INFORMATIONAL)

https://tools.ietf.org/html/rfc6145
6145 IP/ICMP Translation Algorithm. X. Li, C. Bao, F. Baker. April
     2011. (Format: TXT=76484 bytes) (Obsoletes RFC2765) (Status: PROPOSED
     STANDARD)

https://tools.ietf.org/html/rfc6146
6146 Stateful NAT64: Network Address and Protocol Translation from
     IPv6 Clients to IPv4 Servers. M. Bagnulo, P. Matthews, I. van
     Beijnum. April 2011. (Format: TXT=107954 bytes) (Status: PROPOSED
     STANDARD)

https://tools.ietf.org/html/rfc6147
6147 DNS64: DNS Extensions for Network Address Translation from IPv6
     Clients to IPv4 Servers. M. Bagnulo, A. Sullivan, P. Matthews, I. van
     Beijnum. April 2011. (Format: TXT=75103 bytes) (Status: PROPOSED
     STANDARD)

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