nope. tor uses both IPv4 and IPv6 if one of them is not prohibited explicitly

UPDATE:

To reject IPv6 on all levels add this to your torrc:

• ExitPolicy reject6 *:* - it will disableany exit traffic for exit relay, seeExitPolicy description
• ClientUseIPv6 0 - it will prohibit Torclient functionality that serves your requests through Tor network to use IPv6. Docs arehere
• PreferIPv6Automap Off - it will prohibit in hosts auto-mapping(via AutomapHostsOnResolve) functionality to use IPv6, docs arehere
• In yourSocksPort directives make sureno IPv6 is explicitly enabled/preferred, IPv4 is the default for SOCKS proxy Tor backend
• setClientPreferIPv6DirPort 0 andClientPreferIPv6ORPort 0 - it will disable an IPv6 preference for ORPort and DirPort connections
• IPv6Exit 0 to disable using your exit as IPv6 one
• in ORPort flags addIPv4Only

and right - you usereject for IPv4 andreject6 for IPv6

• But if it is going to use IPv6 because there is no Exit Policy Summary defined, why do you say "nope" then? And how can I reject IPv6? I tried something with ExitPolicy reject6: but I think I must use ExitPolicy reject6: instead, right?

  Binary

  – Binary

  2017-02-11 02:27:02 +00:00

  CommentedFeb 11, 2017 at 2:27
• updated my answer

  Alexey Vesnin

  – Alexey Vesnin♦

  2017-02-11 02:43:33 +00:00

  CommentedFeb 11, 2017 at 2:43
• @Binary Is your IPv6 broken, or are you trying to prevent some people from using Tor?

  Michael Hampton

  – Michael Hampton

  2017-02-11 08:53:56 +00:00

  CommentedFeb 11, 2017 at 8:53
• 1
  @MichaelHampton you're asking in such a provocative way, like if I owe you to run it...

  Binary

  – Binary

  2017-02-11 13:05:34 +00:00

  CommentedFeb 11, 2017 at 13:05
• @Binary You don't owe anybody to run Tor. But it seems strange to run it if you only want to block people from using it! So it's a little confusing.

  Michael Hampton

  – Michael Hampton

  2017-02-11 17:06:06 +00:00

  CommentedFeb 11, 2017 at 17:06

• exit-relays
• exit-policies
• ipv6