Bridge mit dummy interface

Muss in die /etc/network/interfaces

auto dummy0
iface dummy0 inet manual
pre-up modprobe dummy numdummies=1

auto vmbr0
iface vmbr0 inet static
    address 10.0.12.1
    netmask 255.255.255.0
    bridge_ports dummy0
    bridge_fd 5
    bridge_stp no
    post-up iptables -t nat -A POSTROUTING -s 10.0.12.0/24 -j MASQUERADE 
    post-up echo 1 > /proc/sys/net/ipv4/ip_forward

Danach

• ifup -v vmbr0