[thaumasiotes]

Comcast at some point stopped letting you administrate your own router. You can log in to it, but port forwarding is no longer available through the administration interface.

If you want port forwarding, they recommend that you do... something. It's not clear what; what you can find on the internet is mostly just people complaining that they insisted to customer support that they needed port forwarding, customer support said they'd do that, and port forwarding still doesn't work.

But, intriguingly, it turns out that a Comcast router will also assign every device on your network at least one public ipv6 address. They also firewall all incoming ipv6 traffic, but unlike the situation with port forwarding, you can disable that firewall on the router admin page. (You can't put up your own firewall.)

[lloeki]

> port forwarding is no longer available through the administration interface.

Sounds like the CGNAT experience, possibly blanket applied even if you have a globally routable public IPv4 in order to have consistent behaviour and reduce network management / support case complexity.

[BobbyTables2]

I’m also a CrapCast subscriber.

I bought my own (plain) modem and manage WiFi/routing myself.

I get the direct Internet-facing IPv4 and IPv6 addresses.

No monthly equipment fee!

[supertrope]

One cannot unplug the Comcast issued router, power cycle the modem, and plug in a customer owned router?

[StuffMaster]

All I see are combo units these days.

[iudqnolq]

You have to bring your own modem. Then you bring your own combo unit or bring your own modem that you can plug a router into.

[spookthesunset]

All the modems I see support bridge mode. When enabled the Comcast device doesn’t do any of the routing at all. Your own device gets to do that instead.

[to11mtm]

Yeah, even at my father's place (I've had different providers than Comcast for personal reasons, but FWIW same story) I've never had a problem just plugging in a router of my choice and using that instead. Makes it a lot easier to handle quirky setups between modem swaps anyway.