Re: Catalog of IPv4 literals
Cameron Byrne <cb.list6@gmail.com> Sun, 25 July 2010 21:06 UTC
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In-Reply-To: <20100725200845.GA19483@vacation.karoshi.com.>
References: <AANLkTi=fpJ9LvS=do+JFZOmgpomZUwQmCLOq0MPpwwDL@mail.gmail.com> <20100725200845.GA19483@vacation.karoshi.com.>
Date: Sun, 25 Jul 2010 14:02:59 -0700
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Subject: Re: Catalog of IPv4 literals
From: Cameron Byrne <cb.list6@gmail.com>
To: bmanning@vacation.karoshi.com
Cc: v6ops@ops.ietf.org
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On Sun, Jul 25, 2010 at 1:08 PM, <bmanning@vacation.karoshi.com> wrote: > > if an application "breaks" becuase someone uses an address literal instead > of a domain name, then that application is itself broken. the DNS translates > the name into an address and the address is used... so whether a name or > a literal is handed to the app should be immaterial. > Please think of the scope as limited to draft-ietf-behave-v6v4-framework scenario #1, IPv6 network to an IPv4 internet. If an IPv4 literal is passed at the application layer (HTML, XML, ...) to a host with only IPv6 connectivity, the service is broken to an IPv6-only user as where it works for an IPv4-only user. Pedantry aside, this is the customer experience for some common internet services. DNS names solve this problem since they allow DNS64 to function. This draft draft-wing-behave-http-ip-address-literals attempts to work around the problem of IPv4 literals passed to hosts in IPv6-only networks, but the work around is only relevant for HTTP and will not work for smartphones or dumbphones that don't have this proxy logic. > so your "catalog" of address literals is really the full set of all IP addresses. > No. Cameron > --bill > > > On Sun, Jul 25, 2010 at 09:01:12AM -0700, Cameron Byrne wrote: >> Folks, >> >> It has been suggest several times to me that IPv4 literals be >> cataloged in a central location so that those working to develop >> IPv6-only networks and services can know the impact of IPv4 addresses >> that are hard-coded into content and protocols. So, i created this >> Google Groups http://groups.google.com/group/ipv4literals and provided >> an example template for reporting found IPv4 literals. Right now, the >> threat of IPv4 literals on IPv6-only networks is small from the >> network operator perspective, it is not a blocking issue. But, for >> the content owners who knowingly or unknowingly have IPv4 literals as >> part of their service, this is major breakage. That said, they have a >> right to know how their service will break so that they can accept the >> risk of having their content unavailable on major networks or work to >> use DNS names that will function correctly. Extra bonus points if >> they resolve this issue of inter-operating with IPv6-only networks by >> producing native IPv6 content! >> >> In my own efforts, i have found content owners very happy to receive >> this proactive notification. Explicitly, myspace and Yahoo! have been >> very good partners in finding and resolving issues of this nature and >> removing IPv4 literals from their production services. Also, over the >> course of my work I have seen Hulu.com independently move to using DNS >> names. The issue is most commonly found with streaming services on >> the Internet, especially ones involving CDNs. >> >> >> Best regards, >> >> Cameron >
- Catalog of IPv4 literals Cameron Byrne
- Re: Catalog of IPv4 literals bmanning
- Re: Catalog of IPv4 literals Cameron Byrne
- Re: Catalog of IPv4 literals bmanning