Mikrotik 4 WAN Load Balance

Mikrotik 4 WAN Load Balancing Full Script

Some time You need a script to merage four line of same/different ISP. Is to get single output like

4 WAN Loadbalancing

wan1+wan2+wan3+wan4.

follow the instruction below. Set the name and ip address like that each interface.

WAN1 IP 192.168.1.2/24

WAN2 IP 192.168.2.2/24

WAN3 IP 192.168.3.2/24

WAN4 IP 192.168.4.2/24

Local IP 192.168.0.1/24

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/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 add address=192.168.4.2/24 network=192.168.4.0 broadcast=192.168.4.255 interface=WAN4 /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=192.168.1.0/24 action=accept in-interface=Local add chain=prerouting dst-address=192.168.2.0/24 action=accept in-interface=Local add chain=prerouting dst-address=192.168.3.0/24 action=accept in-interface=Local add chain=prerouting dst-address=192.168.4.0/24 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=192.168.1.1 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=192.168.4.1 routing-mark=to_WAN4 check-gateway=ping add dst-address=0.0.0.0/0 gateway=192.168.1.1 distance=1 check-gateway=ping add dst-address=0.0.0.0/0 gateway=192.168.2.1 distance=2 check-gateway=ping add dst-address=0.0.0.0/0 gateway=192.168.3.1 distance=3 check-gateway=ping add dst-address=0.0.0.0/0 gateway=192.168.4.1 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

Now Configure DNS server so users can resolve hostnames,

1	/ip dns set allow-remote-requests=yes cache-max-ttl=1w cache-size=5000KiB max-udp-packet-size=512 servers=221.132.112.8,8.8.8.8

All Done ! Now Test the link by putting user load, the more multiple users load you put on it, the better Load Balance result you will get

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PCC WITH UN-EQUAL WAN LINKS

If you have Un-Equal WAN Links, for example WAN,1,2,3 are of 4MB and WAN,4 is of 8 Mb, and you want to force MT to use WAN4 link more then other because of its capacity, Then you have to Add more PCC rules assigning the same two marks to a specific link i.e WAN4 , something like

Code:

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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 dst-address-type=!local in-interface=Local per-connection-classifier=both-addresses-and-ports:4/4 action=mark-connection new-connection-mark=WAN4_conn passthrough=yes

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