this post was submitted on 29 May 2025
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I wonder how often the assigned prefix changes with most of the regular ISPs. I'd have to look someone else's router since I'm still stuck on an old contract. But I believe what I saw with some of the regular consumer contracts: the prefixes stay the same for a long time. You could just slap a free DynDNS service on top and be done with it.
But yes, I think this used to be the promise... We'd all get IPv6 and a lot of gadgets like NAS systems, video cameras and a wifi kettle and they'd be accessible from outside. Instead of that we use big capitalist cloud services and all the data from the internet of things devices has some stopover in the China cloud.
My ISP seems to use just normal DHCP for assigning addresses and honors re-use requests. The only times my IP addresses have changed has been I've changed the MAC or UUID that connects. I've been off-line for a week, come back, and been given the same address. Both IPv4 and v6.
If one really wants their home systems to be publicly accessible, it's easy enough to get a cheap vanity domain and point it at whatever address. rDNS won't work, which would probably interfere with email, but most services don't really need it. It's a bit more complicated to detect when your IP changes and script a DNS update, but certainly do-able, if (like OP) one is hell bent on avoiding any off-site hardware.
Nah, I don't think there's a lot on IPv6 in that book. I think OP's concern is valid. Accessing devices at home isn't unheard of. The amount of smart home stuff, appliances and consumer products increases every day. And we all gladly pay our ISPs to connect us and our devices to the internet. They could as well do a good job while at it. I mean should it cost extra to manage a static prefix, so be it. But oftentimes they really make it hard to even give them money and obtain that "additional" service.
Personally, I find it hard to believe that just not changing somebody's prefix all the time would possibly cause so much technical extra effort that any additional fee is justified.