It's actually harder to tell than that. If you say "connect to
www.kame.net" you'll issue some kind of DNS request. IPv6 addresses
are stored in AAAA records and IPv4 addresses in A records, so if you
ask for both you could end up connecting using either IPv6 or IPv4,
depending on how the socket code's written.

For instance you could write the socket connection logic to say
'resolve for AAAA and A, and iterate over the AAAA records trying to
connect to each IPv6 address in turn, falling back to the A records,
and bailing as a last resort'. I have no idea how Squeak's network
code will do this. Running strace would tell you the OS level calls
Squeak made, which should shed some light on the problem.

Just yesterday I ran into a problem at work where 'localhost' meant
127.0.0.1 on my machine, and ::1 on a build slave. That wasn't fun to
understand.

frank

On 24 September 2013 02:12, Chris Muller <asqueaker at gmail.com> wrote:
> Oops, just saw your second note Frank--
>     No, the turtle doesn't dance.
>
> But I'm back to using my old ISP again because GF started flaking out
> again with the same issues.
>
> So is it possible THAT is why it's "working" with my old ISP?  Because
> my connection with them is not even IPv6 "capable" and so Squeak was
> never attempting to use IPv6 even though the preference was enabled?
> (Whew!)
>
> On Sat, Sep 21, 2013 at 1:38 PM, Frank Shearar <frank.shearar at gmail.com> wrote:
>> Chris, if you go here - http://www.kame.net/ - do you see a dancing
>> turtle? (If you do, you have full IPv6 connectivity to that machine.)
>>
>> frank
>>
>> On 21 September 2013 18:48, tim Rowledge <tim at rowledge.org> wrote:
>>>
>>> On 21-09-2013, at 10:14 AM, Chris Muller <asqueaker at gmail.com> wrote:
>>>
>>>>   sqConnectToAddressSize: Address family not supported by protocol
>>>
>>> Googling the error message suggests it's a pretty common issue. The explanations seem to veer all over the place but the simplest one (ie one I can understand…) is
>>> http://help.directadmin.com/item.php?id=474
>>> It seems as if it is a widely caused library error, but we're well outside my OS comfort zone already.
>>>
>>> tim
>>> --
>>> tim Rowledge; tim at rowledge.org; http://www.rowledge.org/tim
>>> Quality assurance: A way to ensure you never deliver shoddy goods accidentally.
>>>
>>>
>>>
>>
>