Mikrotik How To

This is my firewall mangle, Nat, and Routing Rules for Load Balance with NTH metod at mikrotik 3.x. With This Rules, we can optimize if we have more than one internet connection from ISP's. For Example, if i have 3 line source internet where each speed is 1Mbps, we can optimize to be 3Mbps in one time. To Test this setting, i use Internet Download Manager. Ok this is my rules:

To prevent our network from hacker attack, i use this Minimum Mikrotik Firewall Rules. This Rules is my minimum setting, you can expand it dpend on your network necessery. Here's the code :


/ip firewall filter

add action=drop chain=input comment="" disabled=no dst-port=20-21 protocol=\
tcp src-address-list=!allow
add action=drop chain=input comment="" disabled=no dst-port=22 protocol=tcp \
src-address-list=!allow
add action=drop chain=input comment="" disabled=no dst-port=23 protocol=tcp \
src-address-list=!allow
add action=drop chain=input comment="" disabled=no dst-port=80 protocol=tcp \
src-address-list=!allow

add action=drop chain=forward comment="" disabled=no dst-port=445 \
out-interface=public_interface protocol=tcp
add action=drop chain=forward comment="" disabled=no dst-port=137-139 \
out-interface=public_interface protocol=tcp
add action=drop chain=forward comment="" disabled=no dst-port=137-139 \
out-interface=public_interface protocol=udp
add action=drop chain=forward comment="block spammer or infected users" \
disabled=no dst-address=!xxx.xxx.xxx.xxx/xx dst-port=25 protocol=tcp \
src-address-list=spammer
add action=log chain=forward comment="trap spammers" connection-limit=30,32 \
disabled=no dst-address=!xxx.xxx.xxx.xxx/xx dst-port=25 limit=50,5 \
log-prefix=spammertrap protocol=tcp
add action=add-src-to-address-list address-list=spammer address-list-timeout=\
1d chain=forward comment="trap spammers" connection-limit=30,32 disabled=\
no dst-address=!xxx.xxx.xxx.xxx/xx dst-port=25 limit=50,5 protocol=tcp