With IPv4 my ISP has to shuffle IPs with every reconnect. With IPv6 you could get one IP for lifetime?
While ISP that hand out a static IPv4 can exist, it's much more unlikely, whereas with IPv6 it will become the norm.
no. If an ISP assigns you a dynamic prefix and the various machines in your network use any one of the various privacy features like temporary addresses then the only additional information you leak is some information about how many devices are in your LAN, but as the devices make up additional addresses, it's very fuzzy.
> With IPv4 my ISP has to shuffle IPs with every reconnect. With IPv6 you could get one IP for lifetime?
Your ISP can hand out a new prefix whenever you connect, or even while you are connected. Most of them do this by default.
>While ISP that hand out a static IPv4 can exist, it's much more unlikely, whereas with IPv6 it will become the norm.
it doesn't look like it - at least here in Switzerland, all providers that do provide v6 addresses hand out dynamic prefixes by default and most don't even offer the option of getting a static prefix.
oppressive regimes will assign people static IPv6 prefixes tied with their legal identities.
a) IP pool logging, requires a known IP address and time.
b) NAT logging, requires a known IP address, outgoing port number, and time.
It means the cost of tracking users is moderate to ISPs and authorities, also, for a random observer without access to internal records, a IPv4 user is effectively pseudonymous to the city-level until enough information is revealed.
But if the oppressive regimes really assign assign people static IPv6 prefixes tied with their legal identities intentionally, without any type of privacy extension, it would mean after I use my network connection for a while...
__everyone on the Internet, not just ISPs, can track my activity, possibility tied with my legal identity.__
I'm well aware of the existence of mass surveillance on IPv4, and I'm not advocating IPv4 for a false sense of security, I'm all for IPv6. But this is a true issue for consideration. Using a VPN, or Tor for day-to-day web browsing is the only practical solution to this problem I can think of...
On the other hand, IPv6 will bring end-to-end communications back to the Internet and revive P2P. To that day, perhaps a P2P-based, full mesh, optionally anonymous network will become practical. To this extent, IPv6 does more good than harm.
With my provider green.ch it is not possible to get a static IPv6.
source: I'm fiber7 customer since 2014 and they offered me to do the delegation when I asked them for the static prefix.
The static prefix is nice and they will also basically give you static IPv4 even without paying.
Some devices like cable modems rarely 'reconnect'. As long as your router and cable modem stay powered you can keep your IP for months.
Allocation of IPv4 address by your ISP is not a secure process; if your privacy depends on it your privacy is already compromised. And address allocation policy is independent of which protocol you're using anyway.
The forward DNS still exists, and is useful (I have a CNAME pointing to it), but the reverse DNS was probably just a convenient but privacy-leaking configuration that was noticed while preparing for GDPR.
Morevover, there is the privacy extension for IPv6 that change the local part of the IPv6 at regular interval to avoid tracing.
v6 isn't easier to track. Some of the trackability from v4 remains, some goes away. As an example of the latter, if you go to a café with a wlan and stay for an hour, your laptop may use three different v6 addresses in that time.
Most ISPs give you a new prefix occasionally, such as every night. They don't need to, but so many do it anyway that a tracker cannot assume that 2001:a61:2574:a00/64 is the same customer as yesterday. It may be the same, usually isn't, so tracking is very imprecise.
Often, in order to allow customers to use multiple subnets, ISPs will allocate a /56 (256 subnets) to customers.
For privacy purposes these have the same behavior as IPv4 addresses, in that they in theory can be rotated between users but in practice have lifetimes on the order of months.
I'm not sure if it's the IPv4 shortage or copyright infringement/government surveillance pressure to maintain tight linkage between IP address, account, and legally liable person or address to raid.
There are better tools for tracking, like cookies, session IDs, anything that client software voluntarily sends with some request of any kind. Nowadays even with least trackable protocol possible, DNS, as of DNS-over-HTTPS...
The thing that remains static is the prefix you got from your ISP but that works in exactly the same way as your v4 address you get when you connect.
In theory, yes; in practice, most ISPs will give you a new prefix via DHCPv6-PD anytime your DUID changes (plus sometimes when it doesn't!).
Your web browser is more liable to erode your privacy than IPv6 is (any more than IPv4, anyway).
My question is, without continued adoption of IPv6, could we get to the point where there are two Internets? One that is more accessible for companies that can still afford IPv4 addresses for their servers? Or will worrying about IPv4 users be such an edge case that it will be like designing for IE11?
We can't have it both ways. Either we have flat connectivity and a global address space like IPv6 and have static IPs, or we have to host all services in the cloud. I'd rather have static IPs.