Setting Firewall Mikrotik

Jika pada bahasan sebelumnya kita telah mempelajari bagaimana cara setting mikrotik, maka dalam bahasan ini saya akan kembali membagi ilmu yang pernah saya dapatkan yaitu tentang bagaimana mengamankan mikrotik anda.
salah satunya adalah dengan cara men setting firewall yang ada di mikrotik tersebut, firewall berfungsi sebagai filter paket data dalam sebuah jaringan, apakah paket itu layak di terima atau di tolak. Fungsi firewall sangatlah penting dalam sebuah jaringan internet.

Berikut ini ada beberapa script yang bisa membantu keamanan pada jaringan komputer anda. Caranya adalah anda cukup membuka menu "New Terminal" pada mikrotik dan selanjutnya tinggal ketikan script tersebut, atau bisa juga langsung di copy-paste ke dalam terminal.

/ ip firewall filter
add chain=forward connection-state=established action=accept comment=”allow established connections” disabled=no
add chain=forward connection-state=related action=accept comment=”allow related connections” disabled=no
add chain=virus protocol=udp dst-port=135-139 action=drop comment=”Drop Messenger Worm” disabled=no
add chain=forward connection-state=invalid action=drop comment=”drop invalid connections” disabled=no
add chain=virus protocol=tcp dst-port=135-139 action=drop comment=”Drop Blaster Worm” disabled=no
add chain=virus protocol=tcp dst-port=1433-1434 action=drop comment=”Worm” disabled=no
add chain=virus protocol=tcp dst-port=445 action=drop comment=”Drop Blaster Worm” disabled=no
add chain=virus protocol=udp dst-port=445 action=drop comment=”Drop Blaster Worm” disabled=no
add chain=virus protocol=tcp dst-port=593 action=drop comment=” ” disabled=no
add chain=virus protocol=tcp dst-port=1024-1030 action=drop comment=” ” disabled=no
add chain=virus protocol=tcp dst-port=1080 action=drop comment=”Drop MyDoom” disabled=no
add chain=virus protocol=tcp dst-port=1214 action=drop comment=” ” disabled=no
add chain=virus protocol=tcp dst-port=1363 action=drop comment=”ndm requester” disabled=no
add chain=virus protocol=tcp dst-port=1364 action=drop comment=”ndm server” disabled=no
add chain=virus protocol=tcp dst-port=1368 action=drop comment=”screen cast” disabled=no
add chain=virus protocol=tcp dst-port=1373 action=drop comment=”hromgrafx” disabled=no
add chain=virus protocol=tcp dst-port=1377 action=drop comment=”cichlid” disabled=no
add chain=virus protocol=tcp dst-port=2745 action=drop comment=”Bagle Virus” disabled=no
add chain=virus protocol=tcp dst-port=2283 action=drop comment=”Drop Dumaru.Y” disabled=no
add chain=virus protocol=tcp dst-port=2535 action=drop comment=”Drop Beagle” disabled=no
add chain=virus protocol=tcp dst-port=2745 action=drop comment=”Drop Beagle.C-K” disabled=no
add chain=virus protocol=tcp dst-port=3127 action=drop comment=”Drop MyDoom” disabled=no
add chain=virus protocol=tcp dst-port=3410 action=drop comment=”Drop Backdoor OptixPro” disabled=no
add chain=virus protocol=tcp dst-port=4444 action=drop comment=”Worm” disabled=no
add chain=virus protocol=udp dst-port=4444 action=drop comment=”Worm” disabled=no
add chain=virus protocol=tcp dst-port=5554 action=drop comment=”Drop Sasser” disabled=no
add chain=virus protocol=tcp dst-port=8866 action=drop comment=”Drop Beagle.B” disabled=no
add chain=virus protocol=tcp dst-port=9898 action=drop comment=”Drop Dabber.A-B” disabled=no
add chain=virus protocol=tcp dst-port=10000 action=drop comment=”Drop Dumaru.Y” disabled=yes
add chain=virus protocol=tcp dst-port=10080 action=drop comment=”Drop MyDoom.B” disabled=no
add chain=virus protocol=tcp dst-port=12345 action=drop comment=”Drop NetBus” disabled=no
add chain=virus protocol=tcp dst-port=17300 action=drop comment=”Drop Kuang2" disabled=no
add chain=virus protocol=tcp dst-port=27374 action=drop comment=”Drop SubSeven” disabled=no
add chain=virus protocol=tcp dst-port=65506 action=drop comment=”Drop PhatBot, Agobot, Gaobot” disabled=no

add chain=forward action=jump jump-target=virus comment=”jump to the virus chain” disabled=no
add chain=input connection-state=established action=accept comment=”Accept established connections” disabled=no
add chain=input connection-state=related action=accept comment=”Accept related connections” disabled=no
add chain=input connection-state=invalid action=drop comment=”Drop invalid connections” disabled=no
add chain=input protocol=udp action=accept comment=”UDP” disabled=no
add chain=input protocol=icmp limit=50/5s,2 action=accept comment=”Allow limited pings” disabled=no
add chain=input protocol=icmp action=drop comment=”Drop excess pings” disabled=no
add chain=input protocol=tcp dst-port=21 src-address-list=ournetwork action=accept comment=”FTP” disabled=no
add chain=input protocol=tcp dst-port=22 src-address-list=ournetwork action=accept comment=”SSH for secure shell” disabled=no
add chain=input protocol=tcp dst-port=23 src-address-list=ournetwork action=accept comment=”Telnet” disabled=no
add chain=input protocol=tcp dst-port=80 src-address-list=ournetwork action=accept comment=”Web” disabled=no
add chain=input protocol=tcp dst-port=8291 src-address-list=ournetwork action=accept comment=”winbox” disabled=no
add chain=input protocol=tcp dst-port=1723 action=accept comment=”pptp-server” disabled=no
add chain=input src-address-list=ournetwork action=accept comment=”From Datautama network” disabled=no
add chain=input action=log log-prefix=”DROP INPUT” comment=”Log everything else” disabled=no
add chain=input action=drop comment=”Drop everything else” disabled=no

Fungsi - fungsi tersebut dapat berguna untuk menolak data paket yang dianggap berbahaya dari internet. Dan semoga berguna bagi kita semua, dan tentunya jangan lupa untuk membagi ilmu dengan yang lain ya, wassalam.