Working iax configuration, using vpn

Work instance
[general]
autokill=yes
register => foo2:<password>@10.0.0.1  <--- I don't think this is necessary if both ips are known
[bar2]
type=friend
secret=<same password as above>
auth=plaintext
host=10.0.0.1
context=fromiax
trunk=yes
qualify=yes

Cloud instance
[general]
autokill=yes
[foo2]
type=friend
secret=<same pasword as above>
auth=plaintext
host=10.0.0.100
context=twig
trunk=yes
qualify=yes
deny=0.0.0.0/0.0.0.0
permit=10.0.0.1/255.255.255.255