GlobalProtect IPv6 findings

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GlobalProtect IPv6 findings

L3 Networker

With the IPv6 sinkholing feature not enabled, Mac and Windows users used to be able to successfully connect to IPv6 resources--seemingly completely bypassing GlobalProtect.  Then some Mac users reported not being able to connect to those IPv6 resources anymore.


The wisdom of allowing this IPv6 connectivity is of course debatable and it probably should be (will be eventually) sinkholed.


Anyways, we tested some things and found that the connections worked on MacOS 13.0.1, but not on 13.2.  We did not test versions in between to figure out exactly where it broke.


By adding a static route on the Mac the user was able to regain their IPv6 connectivity.  This static route was for ::/0 and pointed to the IPv6 gateway address of their Internet router.  This will break when they move networks but is a suitable workaround.

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