[ale] AT&T fiber and IPv6?

[Derek Atkins]

Just a small correction -- while AT&T does require their box to be online
for 802.1x authentication, you can absolutely design a network where the
AT&T box is not in the data path!  Indeed, I've done that here.  Basically
my network looks like:

--fiber-- [ONT] ---- [ ER-4 ] --- LAN
                         |
                    [AT&T Box]

Using EAP Proxy and some firewall rules allows this to work and -- viola
-- AT&T box is no longer involved in your day-to-day data usage.

-derek

On Sun, February 13, 2022 9:23 am, James Sumners \(ALE\) via Ale wrote:
> Sounding a lot like I’ll be hoping Comcast actually tries to compete now
> that AT&T has brought actual broadband to my area. 😔
>
>
> On February 12, 2022 at 19:17:58, Bryan L. Gay (ale at bryangay.com) wrote:
>
> I had both Comcast and AT&T Fiber for years in Kennesaw. I was never able
> to get IPv6 delegation working reliably on AT&T, even after they stopped
> doing 6rd. I have Comcast now at the new place, 1.2Gbps downlink, and have
> never had an issue with Comcast's IPv6. AT&T just never seemed to get
> their act together. While having 1Gbps symmetric over IPv4 was great, and
> it was less expensive, I'm happily on Comcast, now. AT&T requires you use
> their gateway, which introduces other recurring problems. On Comcast, I
> own my own DOCSIS dumb modem.
>
> On Fri, Feb 11, 2022, 17:06 James Sumners (ALE) via Ale <ale at ale.org>
> wrote:
>
>
> Earlier today AT&T attached some fiber to the pole directly across the
> street from my driveway. I’m sure it will take them another month or two
> to activate the line, but I want to go ahead and solicit some knowledge
> from you folks.
>
> Currently, I’m on Comcast (plain residential). I despise the business, but
> their network people are top notch and have rolled out a nice stable IPv6
> network. They assign my WAN interface a `/128` and allow network
> assignments via a `/64` or `/60` prefix delegation over DHCPv6. The `/60`
> allows me to create multiple VLANs in my house for things like IoT devices
> separate from my primary devices.
>
> Does anyone have experience with AT&T’s IPv6 implementation? Would
> switching to them be mostly transparent in this regard? Are there any
> “gotchas” that I should be aware of?
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-- 
       Derek Atkins                 617-623-3745
       derek at ihtfp.com             www.ihtfp.com
       Computer and Internet Security Consultant