<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Hello Tor-Dev,<div class=""><br class=""></div><div class="">When opening Tor browser today, I opened <a href="http://check.torproject.org" class="">check.torproject.org</a> and <a href="https://www.fredericjacobs.com/blog/img/tor/ipv6TorCheck.png" class="">got a really confusing message</a>.</div><div class=""><br class=""></div><div class="">My assumption is that the circuit had an exit node that had (possibly multiple) IPv6-enabled, in addition to it’s IPv4. When the exit node connected to the exit node, it did so over IPv6 since <a href="http://check.torproject.org" class="">check.torproject.org</a> has IPv6 addresses.</div><div class=""><br class=""></div><div class="">~ ❯❯❯ host <a href="http://check.torproject.org" class="">check.torproject.org</a><br class=""><a href="http://check.torproject.org" class="">check.torproject.org</a> is an alias for <a href="http://chiwui.torproject.org" class="">chiwui.torproject.org</a>.<br class=""><a href="http://chiwui.torproject.org" class="">chiwui.torproject.org</a> has address 138.201.14.212<br class=""><a href="http://chiwui.torproject.org" class="">chiwui.torproject.org</a> has IPv6 address 2a01:4f8:172:1b46::abba:20:1</div><div class=""><br class=""></div><div class="">That’s a scary warning to get in Tor browser. Any reason <a href="http://chiwui.torproject.org" class="">chiwui.torproject.org</a> has an IPv6 address? Can it be disabled to avoid having people (unnecessarily) freaking out over this warning?</div><div class=""><br class=""></div><div class="">Thoughts?</div><div class=""><br class=""></div><div class="">Best,</div><div class=""><br class=""></div><div class="">Frederic </div></body></html>