QEMU using bridge

Edit:

/etc/network/interfaces

and add:

auto br0 
iface br0 inet static
        address 10.18.44.26
        netmask 255.255.255.192
        broadcast 10.18.44.63
        dns-nameservers 10.0.80.11 10.0.80.12
    post-up route add -net 10.0.0.0 netmask 255.0.0.0 gw 10.18.44.1
    post-up route add -net 161.26.0.0 netmask 255.255.0.0 gw 10.18.44.1
        bridge_ports enp5s0
        bridge_stp off 
        bridge_fd 0
        bridge_maxwait 0

auto br0 
iface br0 inet dhcp
        bridge_ports enp5s0
        bridge_stp off 
        bridge_fd 0
        bridge_maxwait 0

where enp5s0 is eth0 interface. 

Edit:

/etc/qemu/bridge.conf

and add:

allow br0

QEMU:

qemu-system-i386 -net nic -net bridge,br=br0