/etc/network/interfaces:
auto lo eth0 br0
iface lo inet loopback
allow-hotplug eth0
iface eth0 inet dhcp
/etc/dhcp/dhclient.conf:
option rfc3442-classless-static-routes code 249 = array of unsigned integer 8;
supersede dhcp-server-identifier 255.255.255.255;
request subnet-mask, broadcast-address, time-offset, routers, static-routes,
domain-name-servers, netbios-name-servers, ntp-servers,
netbios-scope, interface-mtu, rfc3442-classless-static-routes;
timeout 60;
В iptables указано разрешать весь трафик + прописан NAT во внутреннюю сеть и port-forward для торрента.