[tor-relays] Tor and missing IPv6

David Goulet dgoulet at torproject.org
Wed Mar 24 12:18:04 UTC 2021

On 11 Mar (19:16:50), s7r wrote:
> On 3/10/2021 5:31 PM, William Kane wrote:
> > Hi,
> > 
> > manually specify IP and port, and set the IPv4Only flag for both
> > ORPort and DirPort.
> > 
> > Reference: https://2019.www.torproject.org/docs/tor-manual.html.en
> > 
> > William
> > 
> I think he has a dynamic IP address which is why, according to pasted torrc,
> the used config is:
> `Address Address my.dynamic.dns.url`
> This is a perfectly normal and accepted use-case. I think this is why it
> complained about not being able to find an IPv6 address, because it was
> resolving a hostname instead of parsing an IP address and most probably it
> did not find any AAAA record.
> Anyway, IPv4Only in the ORPort line is the right config for this use-case
> (where you don't have any IPv6 thus don't want to use IPv6 auto-discovery),
> as David said, most annoying bugs regarding IPv6 auto-discovery were fixed.
> So the suggestion to use IPv4Only in torrc line is not a workaround a bug or
> misbehavior or something, it is a corrected configuration parameter (as per
> manual instructs) and should stay like this even in of course.
> I only find this log message unclear:
> [notice] Unable to find IPv6 address for ORPort 9001. You might want to
> specify IPv6Only to it or set an explicit address or set Address.
> I think it means "... You might want to specify *IPv4Only* to it or set it
> to an explicit address or set configure Address."

Oops.. this fell off my radar, mis-placed in my Inbox :(

Yes but also this was fixed in where we flip the "IPv*Only" option so
in that case it should have read "IPv4Only".


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