MacOS IPv6 not functioning without custom static route

[Hasan Berkay Çağır]

Are you sure that private IPs get routed through WG while AllowedIPs is 
"0.0.0.0/0, ::/1, 8000::/1"? I have just tried to ping my local router 
whilst connected to a tunnel with "0.0.0.0/0, ::/1, 8000::/1" and didn't 
have a problem.

I mean, the way which makes sense is that AllowedIPs should work with 
your configuration and we wouldn't even have this conversation, however 
there are some things awkwardly different on the MacOS version from the 
GNU/Linux versions of WG client(s), so I think it might help to try 
every variation.

Best,
Berkay

On 21.07.20 15:29, Adam Cooper wrote:
> Mmm. It looks like unticking "Exclude Private IPs" and entering
> "0.0.0.0/0, ::/1, 8000::/1" gives me a functional setup. Trouble is I
> don't want to route the private IPs and ticking the box (whilst
> retaining '::/1, 8000::/1') allows no traffic at all. There's
> something odd about the way the client is configuring routes but I've
> not got the expertise to figure it out :(
> 
> On Tue, 21 Jul 2020 at 14:12, Hasan Berkay Çağır <berkay at cagir.me> wrote:
>>
>> On 15/07/2020 14:14, Adam Cooper wrote:
>>> ...
>>> Probably worth mentioning that I tried to replace ::/0 with ::/1,
>>> 8000::/1 but that just results in completely broken connectivity in
>>> IPv6 and IPv4 - which may be another issue in and of itself.
>>
>> Did you try only having "::/1, 8000::/1" in the AllowedIPs option? I had
>> a default route creation issue myself where I'm only trying to tunnel
>> IPv6 through; and having this actually solved it.
>>
>> $ netstat -nr
>> Routing tables
>> Internet:
>> ...
>> Internet6:
>> Destination                             Gateway
>> Flags         Netif Expire
>> ::/1                                    link#14
>> UCS           utun2
>> default                                 fe80::%utun0
>> UGcI          utun0
>> default                                 fe80::%utun1
>> UGcI          utun1
>> default                                 fe80::%utun3
>> UGcI          utun3
>> default                                 [ public IPv6 ]
>> UGcI          utun2
>>
>> If just "::/1, 8000::/1" solves the IPv6 issue, I guess you can give it
>> a try with "0.0.0.0/0, ::/1, 8000::/1" to see if both routes are created
>> properly?
>>
>> Best,
>> Berkay