MacOS IPv6 not functioning without custom static route

[Adam Cooper]

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