#Host networking
auto enp5s0
iface enp5s0 inet static
        address 69.420.99.2/28
        gateway 69.420.99.1
        post-up  ip -6 route add default via fe80::1 dev enp5s0

#Bridge networking is routed to the internet
auto vmbr0
iface vmbr0 inet static
        address 10.199.88.1/24
        bridge-ports none
        bridge-stp off
        bridge-fd 0
        post-up   echo 1 > /proc/sys/net/ipv4/conf/all/forwarding
        post-up   echo 1 > /proc/sys/net/ipv6/conf/all/forwarding
        #Masquarade on IPv4, normal forwarding on v6
        post-up   iptables -t nat -A POSTROUTING -s '10.199.88.0/24' -o enp5s0 -j MASQUERADE
        post-down iptables -t nat -D POSTROUTING -s '10.199.88.0/24' -o enp5s0 -j MASQUERADE

iface vmbr0 inet6 static
        address 2001:x:y:z:::1/64

#Bridge networking is bridged to the internet
auto vmbr0
iface vmbr0 inet static
        address 193.a.b.c/27
        gateway 193.a.b.c
        bridge-ports enp6s0
        bridge-stp off
        bridge-fd 0

iface vmbr0 inet static
        address 10.0.0.2/24

iface vmbr0 inet6 static
        address 2001:a:b:c::2/64
        gateway 2001:a:b:c::1