On 06/29/2017 08:41 PM, teor wrote:
On 30 Jun 2017, at 16:55, Scott Bennett bennett@sdf.org wrote:
<SNIP>
Also, is there a problem with having IPv6-only exit service where arelay is accessable via IPv4 for clients and other relays?
Most tor clients send a DNS name, and flags that say whether they allow IPv4 and IPv6, and which one they prefer. They rely on the Exit to resolve the IP address and connect to the site.
On the current network, an IPv6-only Exit won't get the Exit flag, and therefore won't get much client traffic.
OK, so exits need both IPv4 and IPv6.
And it probably shouldn't, until almost all internet sites are on IPv6. Otherwise clients will ask it to connect to IPv4-only sites, and it will fail them.
This confuses me a little. From another subthread:
On 06/29/2017 02:02 PM, teor wrote:
<SNIP>
Many Exit operators already enable IPv6Exit. Most Tor clients automatically Exit through IPv6 when it is available. (It is the default in recent versions of Tor.)
What happens for Tor clients without local IPv6 stacks, when they use a dual-stack exit to hit a dual-stack site? An IPv4 connection, right?
If the client is on a dual-stack machine, it would default to IPv6, right? So Tor circuits would be doing IPv6 over IPv4, yes?