Amigo mas em pcc puro nao tem problema do modem estar roteado ou bridge, pois nao da problema em https, nem precisa usar address list
Esse modo é mais rápido e fácil de configura para os iniciantes.
to precisado de um tutorial de balance 3 link iguais com modem em modo router...
DSL MODEM IPs
DSL MODEM 1 = 192.168.1.1
DSL MODEM 2 = 192.168.2.1
DSL MODEM 3 = 192.168.3.1
/ip address
add address=192.168.0.1/24 network=192.168.0.0 broadcast=192.168.0.255
interface=Local
add address=192.168.1.2/24 network=192.168.1.0 broadcast=192.168.1.255
interface=WAN1
add address=192.168.2.2/24 network=192.168.2.0 broadcast=192.168.2.255
interface=WAN2
add address=192.168.3.2/24 network=192.168.3.0 broadcast=192.168.3.255
interface=WAN3
/ip dns set allow-remote-requests=yes cache-max-ttl=1w cachesize=5000KiB max-udp-packet-size=512 servers=8.8.8.8,8.8.4.4
/ip firewall mangle
add chain=input in-interface=WAN1 action=mark-connection newconnection-mark=WAN1_conn
add chain=input in-interface=WAN2 action=mark-connection newconnection-mark=WAN2_conn
add chain=input in-interface=WAN3 action=mark-connection newconnection-mark=WAN3_conn
add chain=output connection-mark=WAN1_conn action=mark-routing newrouting-mark=to_WAN1
add chain=output connection-mark=WAN2_conn action=mark-routing newrouting-mark=to_WAN2
add chain=output connection-mark=WAN3_conn action=mark-routing newrouting-mark=to_WAN3
add chain=prerouting dst-address=192.168.1.0/24 action=accept ininterface=Local
add chain=prerouting dst-address=192.168.2.0/24 action=accept ininterface=Local
add chain=prerouting dst-address=192.168.3.0/24 action=accept ininterface=Local
add chain=prerouting dst-address-type=!local in-interface=Local perconnection-classifier=both-addresses-and-ports:2/0 action=markconnection new-connection-mark=WAN1_conn passthrough=yes
add chain=prerouting dst-address-type=!local in-interface=Local perconnection-classifier=both-addresses-and-ports:2/1 action=markconnection new-connection-mark=WAN2_conn passthrough=yes
add chain=prerouting dst-address-type=!local in-interface=Local perconnection-classifier=both-addresses-and-ports:2/2 action=markconnection new-connection-mark=WAN3_conn passthrough=yes
add chain=prerouting connection-mark=WAN1_conn in-interface=Local
action=mark-routing new-routing-mark=to_WAN1
add chain=prerouting connection-mark=WAN2_conn in-interface=Local
action=mark-routing new-routing-mark=to_WAN2
add chain=prerouting connection-mark=WAN3_conn in-interface=Local
action=mark-routing new-routing-mark=to_WAN3
/ip route
add dst-address=0.0.0.0/0 gateway=192.168.1.1 routing-mark=to_WAN1
check-gateway=ping
add dst-address=0.0.0.0/0 gateway=192.168.2.1 routing-mark=to_WAN2
check-gateway=ping
add dst-address=0.0.0.0/0 gateway=192.168.3.1 routing-mark=to_WAN3
check-gateway=ping
add dst-address=0.0.0.0/0 gateway=192.168.1.1 distance=1 checkgateway=ping
add dst-address=0.0.0.0/0 gateway=192.168.2.1 distance=2 checkgateway=ping
add dst-address=0.0.0.0/0 gateway=192.168.3.1 distance=3 checkgateway=ping
/ip firewall nat
add chain=srcnat out-interface=WAN1 action=masquerade
add chain=srcnat out-interface=WAN2 action=masquerade
add chain=srcnat out-interface=WAN3 action=masquerade