[tor-relays] Tor relay failed to start after upgrade (0.4.4.6 --> 0.4.5.5) [solved]

[David Goulet]

On 09 Feb (11:55:12), tschador at posteo.de wrote:
> Tonight my Tor relay on Raspberry Pi (buster) was upgraded from
> 0.4.4.6-1~bpo10+1 to 0.4.5.5-rc-1~bpo10+1 automaticly, but failed to start:
> 
> ---
> [notice] Opening OR listener on 0.0.0.0:587
> [notice] Opened OR listener connection (ready) on 0.0.0.0:587
> [notice] Opening OR listener on [::]:587
> [warn] Socket creation failed: Address family not supported by protocol
> [notice] Opening Directory listener on 0.0.0.0:995
> [notice] Closing partially-constructed OR listener connection (ready) on
> 0.0.0.0:587
> [notice] Closing partially-constructed Directory listener connection (ready)
> on 0.0.0.0:995
> ---
> 
> Until then there was no change in my torrc:
> 
>   ORPort 587
>   DIRPORT 995

Oh wow, interesting, so your Pi doesn't support IPv6 for some reasons and it
failed to start with this config.

I have opened: https://gitlab.torproject.org/tpo/core/tor/-/issues/40283

In 0.4.5.x tor, things have changed where tor will try to auto discover an
IPv6 and automatically bind to it if only "ORPort <PORT>" is used.

In other words, it now binds to 0.0.0.0 and [::] by default. It then publish
any discovered _usable_ and _reachable_ IPv4/IPv6. If it doesn't find any
IPv6, it will still listen but won't publish any IPv6.

> 
> It seems the value [address:] is no longer optional if you're not IPv6 ready
> [1]:
> 
>   ORPort [address:]PORT|auto [flags]
>   DirPort [address:]PORT|auto [flags]
> 
> So I have to change my torrc to:
> 
>   ORPort 0.0.0.0:587
>   DIRPORT 0.0.0.0:995

Another option would have been to add the "IPv4Only" flag to the ORPort line
and should have done it for you.

Cheers!
David

-- 
YrY9JHvSOJpDfyKS5AyL8h/BjZ/SQEkh00q9ek+1BXk=
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 488 bytes
Desc: not available
URL: <http://lists.torproject.org/pipermail/tor-relays/attachments/20210209/2694f982/attachment.sig>