Comcast enables 6to4 relays

John Jason Brzozowski john_brzozowski at cable.comcast.com
Sun Aug 29 08:28:42 CDT 2010


Mikael,

I agree with your points and echoed them in my earlier reply.  6to4 is out
there and is likely not to go away any time soon.  Folks should definitely
see what 6to4 relay they default to, you might be surprised (or not).

FWIW - I updated ARIN's wiki for 6to4 relay deployment with some generic
updates.  I will add some more text shortly that folks may find useful if
they decide to deploy their own 6to4 relays.

John 


On 8/29/10 3:19 AM, "Mikael Abrahamsson" <swmike at swm.pp.se> wrote:

> On Sat, 28 Aug 2010, John Jason Brzozowski wrote:
> 
>> In most cases, we observed that 6to4-enabled operating systems and devices
>> were attempting to use a 6to4 relay infrastructure hosted by a midwestern
>> university.
> 
> Before that they used our (Tele2) 6to4 relays in Amsterdam and Paris. I
> think this was discussed here 1-2 years back.
> 
> I couldn't find it, but
> <http://gpshead.blogspot.com/2009/01/consumer-router-ipv6-firewall-fail.html>
> says the same thing.
> 
> I urge more people to look up what 6to4 relays you're using and set up
> your own if needed. People *are* using it and you not doing it is making
> things worse for your customers. Yes, 6to4 is generally bad but it's out
> there. Everybody needs to think about it.

=========================================
John Jason Brzozowski
Comcast Cable
e) mailto:john_brzozowski at cable.comcast.com
o) 609-377-6594
m) 484-962-0060
w) http://www.comcast6.net
=========================================





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