[186508] in North American Network Operators' Group
Re: Nat
daemon@ATHENA.MIT.EDU (Matt Palmer)
Sun Dec 20 22:29:10 2015
X-Original-To: nanog@nanog.org
Date: Mon, 21 Dec 2015 14:28:33 +1100
From: Matt Palmer <mpalmer@hezmatt.org>
To: nanog@nanog.org
In-Reply-To: <00e801d13b96$873e1120$95ba3360$@gmail.com>
Errors-To: nanog-bounces@nanog.org
On Sun, Dec 20, 2015 at 09:23:04PM -0500, Chuck Church wrote:
> I agree that a /48 or /56 being reserved for business
> customers/sites is reasonable. But for residential use, I'm having a hard
> time believing multi-subnet home networks are even remotely common outside
> of networking folk such as the NANOG members. A lot of recent IPv4 devices
> such as smart TVs have the ability to auto-discover things they can talk to
> on the network. If we start segmenting our home networks to keep toasters
> from talking to thermostats, doesn't this end up meaning your average home
> user will need to be proficient in writing FW rules? Bridging an entire
> house network isn't that bad.
Depends on how many devices you have on it. Once you start filling your
home with Internet of Unpatchable Security Holes devices, having everything
on a single ethernet segment might start to get a little... noisy.
Thankfully, IPv6 has well-defined multicast scopes, which makes it trivially
easy to do cross-L2-segment service discovery without needing to resort to
manually berking around with firewall rules.
- Matt
