= Сообщение: 1209 из 7440 ============================================= IPV6 = От : Michiel van der Vlist 2:280/5555 09 Jan 15 01:22:29 Кому : Markus Reschke 09 Jan 15 01:22:29 Тема : binkd completed... FGHI : area://IPV6?msgid=2:280/5555+54af2185 На : area://IPV6?msgid=2:240/1661+549aa643 = Кодировка сообщения определена как: CP850 ================================== Ответ: area://IPV6?msgid=2:240/1661+549aa647 ============================================================================== Hello Markus,
On Thursday January 08 2015 13:49, you wrote to me:
MvdV>> With IPv6 you get a RANGE of addresses. Large enough to give MvdV>> every device on your LAN its own globally routable IPv6 MvdV>> address. The first 64 bits of the range is called the prefix. MvdV>> Actually the range is larger than that, but we will ignore that MvdV>> for the moment. The ISP communicates the range to the MvdV>> customer's router by prefix delegation.
MR> Actually the user gets two prefixes, one for the WAN connection MR> (mostly a /64) and one for the LAN (/48, /56 or just a /64).
I didn't want to make it too complicated, so I ignored that as it wasn't relevant for the issue at hand: his changing IPv6 address. And I am still puzzled about it as it is obviously not an ISP related issue, the prefix does not change...
MvdV>> Dynamic addresses were used with IPv4 to conserve addresses. An MvdV>> IP address could be assigned to another user when the previous MvdV>> one logged out. This made sense in the age of dial up IP. It MvdV>> does not make sense with IPv6 with (semi) permanent connections MvdV>> and no shortage of addresses.
MR> Let's say, it's not necessary for technical reasons. But if you take MR> privacy issues into account things change ;)
Dynamic addresses are a nuisance when running servers and they are of very little help for preserving privacy. It is of no use against governments or the NSA. It is also of little help against Google et al. There are so many other ways to identify a user than just the IP number.
MR> My provider assigns a new IPv4 address when re-connecting. But there MR> seems to be a time window for the IPv6 LAN prefix.
Any idea how long?
MR> In theory I should get new addresses every 6 months, if there would be MR> no outages or maintenance windows :)
Why a new prefix every six month? For privacy that is far too long a period to be of use. Cheers, Michiel
