commit c09bbe991728cfc012f2f6d689eb9348e91b6cd6 Author: teor teor@torproject.org Date: Wed Feb 5 13:10:26 2020 +1000

Prop 312: Update IPv6 Privacy Extensions

As suggested by s7r.

Part of 33073. --- proposals/312-relay-auto-ipv6-addr.txt | 7 +++++++ 1 file changed, 7 insertions(+)

diff --git a/proposals/312-relay-auto-ipv6-addr.txt b/proposals/312-relay-auto-ipv6-addr.txt index cff3c77..ad7e7f4 100644 --- a/proposals/312-relay-auto-ipv6-addr.txt +++ b/proposals/312-relay-auto-ipv6-addr.txt @@ -1286,6 +1286,13 @@ Ticket: #33073 applications if a particular address is using privacy extensions. So implementing this change may be difficult.

+ On operating systems that provide IPv6 address privacy extension state, + IPv6 addresses may be: + * "public" - these addresses do not change + * "temporary" - these addresses change due to IPv6 privacy extensions. + Therefore, tor should prefer "public" IPv6 addresses, when they are + available. + However, even if we do not make this change, tor should be compatible with the RFC 4941 defaults: * a new IPv6 address is generated each day