Well I’ve encountered another strange issue I’m not sure what to do about. I 
can successfully bring up my tunnel from my client to the server with 
leftsubnet 192.168.1.0/24 and rightsubnet 0.0.0.0/0. I have a bypass in place 
so I can still get to the local LAN. That all works great. The local lan does 
not have working IPv6 so the client only has the fe80:: link-local IPv6 
address. If the tunnel is down, ‘apt-get update’ works as expected and connects 
via IPv4. When the tunnel is up, ‘apt-get update’ uses IPv6 exclusively which 
fails of course and doesn’t attempt to use IPv4 at all. I have no IPv6 related 
configuration in my ipsec.conf on either side so I’m at a loss as to why 
apt-get is behaving this way. I can’t find any change in the IPv6 configuration 
in the routing table or interfaces when the tunnel comes up so I’m not sure 
what exactly is causing apt-get to change it’s behavior. I’m not even sure 
where to start looking. Any ideas would be appreciated. Thanks,

-David Mitchell

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