62. Mikrotik 4 WANs(Static IPs) Load Balancing and Fail Over(PCC Method)

/interface ethernet
set 0 name=Local
set 1 name=WAN1
set 2 name=WAN2
set 3 name=WAN3
set 4 name=WAN4


/ip address
add address=192.168.22.2/24 interface=WAN1
add address=192.168.23.2/24 interface=WAN2
add address=192.168.24.2/24 interface=WAN3
add address=192.168.25.2/24 interface=WAN4
add address=192.168.2.1/24 interface=Local

/ip dns set allow-remote-requests=yes cache-max-ttl=1w cache-size=5000KiB max-udp-packet-size=512 servers=103.28.3.187,8.8.8.8

/ip firewall mangle
add chain=input in-interface=WAN1 action=mark-connection new-connection-mark=WAN1_conn
add chain=input in-interface=WAN2 action=mark-connection new-connection-mark=WAN2_conn
add chain=input in-interface=WAN3 action=mark-connection new-connection-mark=WAN3_conn
add chain=input in-interface=WAN4 action=mark-connection new-connection-mark=WAN4_conn

add chain=output connection-mark=WAN1_conn action=mark-routing new-routing-mark=to_WAN1
add chain=output connection-mark=WAN2_conn action=mark-routing new-routing-mark=to_WAN2
add chain=output connection-mark=WAN3_conn action=mark-routing new-routing-mark=to_WAN3
add chain=output connection-mark=WAN4_conn action=mark-routing new-routing-mark=to_WAN4

add chain=prerouting dst-address=192.168.22.0/24 action=accept in-interface=Local
add chain=prerouting dst-address=192.168.23.0/24 action=accept in-interface=Local
add chain=prerouting dst-address=192.168.24.0/24 action=accept in-interface=Local
add chain=prerouting dst-address=192.168.25.0/24 action=accept in-interface=Local

add chain=prerouting dst-address-type=!local in-interface=Local per-connection-classifier=both-addresses-and-ports:4/0 action=mark-connection new-connection-mark=WAN1_conn passthrough=yes
add chain=prerouting dst-address-type=!local in-interface=Local per-connection-classifier=both-addresses-and-ports:4/1 action=mark-connection new-connection-mark=WAN2_conn passthrough=yes
add chain=prerouting dst-address-type=!local in-interface=Local per-connection-classifier=both-addresses-and-ports:4/2 action=mark-connection new-connection-mark=WAN3_conn passthrough=yes
add chain=prerouting dst-address-type=!local in-interface=Local per-connection-classifier=both-addresses-and-ports:4/3 action=mark-connection new-connection-mark=WAN4_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
add chain=prerouting connection-mark=WAN4_conn in-interface=Local action=mark-routing new-routing-mark=to_WAN4

/ip route
add dst-address=0.0.0.0/0 gateway=192.168.22.1 routing-mark=to_WAN1 check-gateway=ping
add dst-address=0.0.0.0/0 gateway=192.168.23.1 routing-mark=to_WAN2 check-gateway=ping
add dst-address=0.0.0.0/0 gateway=192.168.24.1 routing-mark=to_WAN3 check-gateway=ping
add dst-address=0.0.0.0/0 gateway=192.168.25.1 routing-mark=to_WAN4 check-gateway=ping

add dst-address=0.0.0.0/0 gateway=192.168.22.1 distance=1 check-gateway=ping
add dst-address=0.0.0.0/0 gateway=192.168.23.1 distance=2 check-gateway=ping
add dst-address=0.0.0.0/0 gateway=192.168.24.1 distance=3 check-gateway=ping
add dst-address=0.0.0.0/0 gateway=192.168.25.1 distance=4 check-gateway=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
add chain=srcnat out-interface=WAN4 action=masquerade

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