Opened 4 months ago

#33819 new task

Make clients and bridges send IPv6 extends by default in Tor 0.4.5

Reported by: teor Owned by:
Priority: Medium Milestone: Tor: 0.4.5.x-final
Component: Core Tor/Tor Version:
Severity: Normal Keywords: ipv6, prop311, 045-should
Cc: Actual Points:
Parent ID: #33220 Points: 1
Reviewer: Sponsor: Sponsor55-can


If #33818 is included in Tor 0.4.4, the relays will send IPv6 extends by default. But clients and bridges won't, for anonymity reasons.

By the time 0.4.5 is released, a large number of clients and bridges will be on 0.4.4. So it will be safe for clients and bridge to send IPv6 extends.

Here's what we need to do to change the default:

  • set ExtendByIPv6ORPort=1 in the consensus, and
  • set ExtendByIPv6ORPort 1 as the default in Tor.

To avoid confusion, clients and bridges will send IPv6 extends, but they won't initiate outbound IPv6 connections to relays. For more details, see #33818 and ExtendAllowIPv6Addresses.

Child Tickets

#33818assignedAdd options for clients and relays to enable IPv6 extendsCore Tor/Tor
#33826assignedAdd a testing-only option that turns off IPv4 extendsCore Tor/Tor

Change History (0)

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