6 ms·
Nearly all modern operating systems use the IPv6 privacy extension, which creates random addresses periodically. Thus the tracking is randomized to the /64 (whi
by Faaak 6y ago
Nearly all modern operating systems use the IPv6 privacy extension, which creates random addresses periodically. Thus the tracking is randomized to the /64 (which is an end customer). This is more or less the same as with IPv4 (without CGNAT)
- jakeogh 6y agoIrrelevant. It's within your subnet, and it's nowhere near 32b. https://www.transtutors.com/questions/how-many-bits-are-needed--674414.htm https://www.transtutors.com/questions/how-many-bits-are-need...
- Faaak 6y agoyeah, like when you have a /32 IPv4 dedicated to your private subnet; it's the same.
- jakeogh 6y agoWhy use IPv6 if you are going to hand out IPv4 addresses? People know why. Even if a few really get 32's, it's PR. The endgame is the same. This is a critical path item for removing the ability to have 2 party value transfers. The power at stake is incalculably valuable.
- detaro 6y agoWhat do you mean by " Even if a few really get 32's, it's PR."? The vast majority of IPv4 connections get an IPv4 IP (= a /32), CGNAT is pretty much only used by providers that don't have another choice and has various downsides for users too.
- jakeogh 6y agoObviously, it's temporary. Handing every possible IPv4 user 2^32 IPv6 addresses is a worse than pointless gesture. It's an 10^9 scale changing of the subject. IPv4 not having enough addresses is why it's valuable. It's impossible to arm band every human with 32b. EDIT: I'm comment limited for the night. @efzx: Seeing "google" in the same sentience with "does not have anything with tracking" is pretty good stuff.
- lmm 6y agoYour subnet is no more uniquely identifying than a (non-CGNAT) IPv4 address; if 32 bits identifies which router you're using (whether that's your home, coffee shop or whatever) then a 64 bit identifier doesn't make that router any more identified.
- detaro 6y agoIn the typical IPv4 setup, your network gets an IPv4 address. Everything in your network is trivial to group. In the typical IPv6 setup, your network gets an IPv6 prefix from which client devices use randomized and rotating IPs. Everything in your network is trivial to group. How long the network-identifying address/prefix is stable is purely an ISP design choice - some keep them as long as possible, others force a change regularly.
- Arnt 6y agoIs a /64 really an end customer? How common is that? Both of my ISPs hand out new ISPs hand out new /64 prefixes every so often. One does it every half-hour, the other is comparable but I don't remember. I think they do it to encourage business customers to get more expensive connections, but the effect on my connections is that each device's IP address changes every few minutes, within the ISP's /32, and doesn't repeat in a year... and I do wonder how many IPSs do this.
- blibble 6y agomy residential isp hands out as many /48s as you want
- Dagger2 6y ago/64 is a subnet. End customers get /56 to /48 so that they can run multiple subnets. It is, unfortunately, more common than it should be for ISPs to not even give the minimum of that range though. Changing your prefix every half an hour would be... unusual, at least, although again I wouldn't put it past some ISPs to do that (possibly unintentionally)... but sounds like your prefix might be changing every time you do a DHCPv6-PD request, which makes me wonder if your DHCPv6 client might be generating a new DUID for every request rather than remembering it.
- Arnt 6y agoIt's a subnet, yes. GP declared it to be approximately the same as an end customer. How do you know that the ISP replacing it often is "unusual, to say the least"? Or is that something you know?
- Dagger2 6y agoThere's a fair few ISPs changing the prefix every day, but this is the first I've heard of anyone changing it every half an hour. If it was common I would've heard a lot of complaining about it by now.
- 6y ago