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Comment by nfriedly | Hacker News Reader

My ISP (Metronet) uses CGNAT and refuses to touch IPv6. In my case, when I complained that port forwarding didn't work, they gave me a static IPv4 for free, but I have to call back once a year or else they start billing me $10/month for it.

I don't need a static IP. I'd be completely fine with a dynamic IPv4 or even dynamic IPv6. But they don't offer that. Just static IPv4 or CGNAT IPv4. Oh well, some day...

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With most people leaving their router switched on all the time, the difference between a static and dynamic IPv4 address from the point of view of the ISP is probably marginal.

In Germany all bigger DSL providers still disconnect you once a day and issue new IPs.

Bad for at home hosting, good for privacy.

Is that so? At least Telekom doesn't do that for IPv4 anymore. They do have a 24h dynamic prefix for IPv6 though (which feels very weird, considering they stopped doing that for IPv4)

The ephemeral IPv6 addresses are just the IPv6 privacy extensions at work. They're just following RFCs

I guess their router stack provides this for free, while the "Zwangstrennung" (disconnect every 24h) was implemented somewhere on their side. So it's actually easier now for them

Partially. Telekom keeps up the line for months at a time. I guess that is due to telephony being done via VoIP, and they don't want to interrupt your late night calls.

Others, even Congstar (which is a cheap telekom brand), do 24h disconnects with a new v4 address, and no v6 at all.

The DSL I use gives me a fixed v4 and v6 range, but still needs to do the daily disconnects.

how do you know what ALL of the them do??

Yeah, that's true enough.

I guess the point I was trying to make is that I think IPv6 is a better solution to their problem of not having enough IPv4 addresses.

The difference is typically between a static _public_ IPv4 address or a dynamic _private_ IPv4 address, and CGNAT sharing public IPv4 addresses across subscribers.

For a long time I ran a HE tunnel to get me some sweet static IPv6, but now that my cable company has turned it on I no longer need that (probably should still have it as a backup).

https://www.tunnelbroker.net

Guess they are sticking with their old equipment, because IPv6 is free in any modern industrial ISP router.

I also have Metronet, but haven’t found any compelling reason for a static IP. I use Tailscale for remote access, and though I don’t host anything from home currently, Cloudflare Tunnel should work.

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