Mikrotik Firewall Script for Your Internet Security

FIREWALL STANDAR
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/ip firewall filter
add chain=forward connection-state=established comment=”allow established connections”
add chain=forward connection-state=related comment=”allow related connections”
add chain=forward connection-state=invalid action=drop comment=”drop invalid connections”
add chain=virus protocol=tcp dst-port=135-139 action=drop comment=”Drop Blaster Worm”
add chain=virus protocol=udp dst-port=135-139 action=drop comment=”Drop Messenger Worm”
add chain=virus protocol=tcp dst-port=445 action=drop comment=”Drop Blaster Worm”
add chain=virus protocol=udp dst-port=445 action=drop comment=”Drop Blaster Worm”
add chain=virus protocol=tcp dst-port=593 action=drop comment=”________”
add chain=virus protocol=tcp dst-port=1024-1030 action=drop comment=”________”
add chain=virus protocol=tcp dst-port=1080 action=drop comment=”Drop MyDoom”
add chain=virus protocol=tcp dst-port=1214 action=drop comment=”________”
add chain=virus protocol=tcp dst-port=1363 action=drop comment=”ndm requester”
add chain=virus protocol=tcp dst-port=1364 action=drop comment=”ndm server”
add chain=virus protocol=tcp dst-port=1368 action=drop comment=”screen cast”
add chain=virus protocol=tcp dst-port=1373 action=drop comment=”hromgrafx”
add chain=virus protocol=tcp dst-port=1377 action=drop comment=”cichlid”
add chain=virus protocol=tcp dst-port=1433-1434 action=drop comment=”Worm”
add chain=virus protocol=tcp dst-port=2745 action=drop comment=”Bagle Virus”
add chain=virus protocol=tcp dst-port=2283 action=drop comment=”Drop Dumaru.Y”
add chain=virus protocol=tcp dst-port=2535 action=drop comment=”Drop Beagle”
add chain=virus protocol=tcp dst-port=2745 action=drop comment=”Drop Beagle.C-K”
add chain=virus protocol=tcp dst-port=3127-3128 action=drop comment=”Drop MyDoom”
add chain=virus protocol=tcp dst-port=3410 action=drop comment=”Drop Backdoor OptixPro”
add chain=virus protocol=tcp dst-port=4444 action=drop comment=”Worm”
add chain=virus protocol=udp dst-port=4444 action=drop comment=”Worm”
add chain=virus protocol=tcp dst-port=5554 action=drop comment=”Drop Sasser”
add chain=virus protocol=tcp dst-port=8866 action=drop comment=”Drop Beagle.B”
add chain=virus protocol=tcp dst-port=9898 action=drop comment=”Drop Dabber.A-B”
add chain=virus protocol=tcp dst-port=10000 action=drop comment=”Drop Dumaru.Y”
add chain=virus protocol=tcp dst-port=10080 action=drop comment=”Drop MyDoom.B”
add chain=virus protocol=tcp dst-port=12345 action=drop comment=”Drop NetBus”
add chain=virus protocol=tcp dst-port=17300 action=drop comment=”Drop Kuang2″
add chain=virus protocol=tcp dst-port=27374 action=drop comment=”Drop SubSeven”
add chain=virus protocol=tcp dst-port=65506 action=drop comment=”Drop PhatBot, Agobot, Gaobot”
add chain=forward action=jump jump-target=virus comment=”jump to the virus chain”
add chain=forward action=accept protocol=tcp dst-port=80 comment=”Allow HTTP”
add chain=forward action=accept protocol=tcp dst-port=25 comment=”Allow SMTP”
add chain=forward protocol=tcp comment=”allow TCP”
add chain=forward protocol=icmp comment=”allow ping”
add chain=forward protocol=udp comment=”allow udp”
add chain=forward action=drop comment=”drop everything else”
add chain=input src-address-list=”port scanners” action=drop comment=”dropping port scanners” disabled=no

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Bypass traceroute traffic
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/ip firewall filter add chain=forward protocol=icmp icmp-options=11:0 action=drop comment=”Drop Traceroute”
/ip firewall filter add chain=forward protocol=icmp icmp-options=3:3 action=drop comment=”Drop Traceroute”

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LIMITED PING
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/ip firewall filter add chain=input action=drop protocol=icmp limit=50/5s,2