How do I set up the "Access an app from another private network" functionality regarding the default network?

How do I run this command so that it exposes an app to the default network, and ONLY to the default network? When I run

fly ips allocate-v6 -a APPNAME --private --network default, I get Error: Could not find Network.

Could just running fly ips allocate-v6 -a APPNAME --private do what I need?

Yes, this does work, although I’m somewhat surprised that the explicit --network default failed. (Maybe it internally thinks of that as nil.)

Like before, you can verify by comparing the first 3 :-delimited blocks of hex digits in the IP address—with the corresponding part of the address of a machine within the default network…

fdaa:3:2210:0:1::20                ←  flycast
fdaa:3:2210:a7b:119:7654:6543:2    ←  machine (client)
^^^^^^^^^^^
   equal

Conversely, machines that differ there will not be able to use it.

(There isn’t really a “nesting” structure among the 6PNs, even though it might sound that way at first…)

Hope this helps!

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