bug#74907: 31.0.50; nsm-check-local-subnet-ipv4 test fails on macOS with VPN enabled

[Robert Pluim]

>>>>> On Tue, 17 Dec 2024 08:11:36 -0500, Ship Mints <shipmints@gmail.com> said:

    Ship> Good catch. Bug could be either or both Apple or vendor +/- the VPN
    Ship> implementation and if it also uses Network Extension Framework 
filters or
    Ship> whatever. The BSD-derived source code in question in netinet hasn't 
really
    Ship> changed appreciably in ages. Could also be an implied "6to4" bridge 
that
    Ship> the VPN sets up that screws things up. With the VPN running, go go 
System
    Ship> Preferences...Network...and you should be able to visually identify if
    Ship> there's a virtual "port" or relay.

I suspect vendor more than Apple, since I donʼt see such behaviour
with either of the two VPN clients I have on my macOS machine.

Robert
--