[GRLUG] AT&T Uverse TV + 6to4 = ?

[Mike Williams]

After more investigation, the situation is significantly better than I 
thought. The DMZ+ option actually does more than I thought. It's a weird 
hybrid of bridging and DMZ NAT. The "DMZ pinhole" device gets the 
outside IP address and a complete lack of firewalling, but the IGMP TV 
traffic somehow gets through the firewall to a Nat'd IP address on the 
set-top box.

Now I just need to get tunneling working.

On 07/09/2011 11:19 PM, Michael Mol wrote:
> I haven't done anything specific with IGMP routing, but my
> recommendation would be to switch away from using something like
> OpenWRT and use a low-end x86 PC with a couple cheap NICs in it. I'd
> bet you could throw together a sufficient machine out of spare parts,
> possibly with the aid of a couple $5-$15 NICs you can get from any of
> the local non-chain computer stores.
>
> Then load Linux on the box and go to town with firewall distros, or
> roll your own while learning the protocols in question.
>
> On Sat, Jul 9, 2011 at 10:17 PM, Mike Williams<knightperson at zuzax.com>  wrote:
>> After some fairly intensive research, I've determined that AT&T Uverse's TV
>> service is a smarter system than I thought. It uses IGMP version 3
>> multicasting so it can minimize the amount of data that has to be
>> transmitted down their backbone. Besides on-demand programming, each segment
>> of the network will be carrying, at most, a single copy of each video
>> stream.
>>
>> I want to run an IPv6 tunnel through Hurricane Electric, handled by an
>> OpenWRT router, and still have my TV work. There are three pieces of
>> equipment that have to work here, not counting a miscellaneous switch or
>> two. AT&T provided a "residential gateway", which is a 2Wire 3800 that
>> decodes the external DSL signal, handles the IGMP multicasting, and directs
>> it to wherever the set-top box (piece #2) is. Piece #3 is the OpenWRT
>> router, which I recently upgraded to speak IPv6.
>>
>> Here's the problem. I can't seem to get the OpenWRT to speak IGMP, so I
>> can't put the set-top box "inside" it or else the TV doesn't work.
>> Similarly, the 2Wire router can't be taught to route any protocols but UDP
>> or TCP (and 6to4 is none of the above) to specific IP's inside, so I can't
>> put the OpenWRT "inside" of it and direct tunnel traffic to its IP. I can
>> direct all traffic (DMZ Pinhole mode) to it, but that breaks TV again.
>>
>> Any suggestions? I might have to invest in a router that speaks IGMPv3 as
>> well as 6to4 tunneling.
>>
>>
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>


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