Cara Blok Virus, Spam dan Worm di Jaringan dengan Mikrotik

Salah satu cara virus untuk masuk ke jaringan adalah lewat port-port tertentu. Agar terhindar dari berbagai macam serangannya, kita harus mengawasi atau kalau diperlukan. kita mesti menutup port tersebut. Salah satu cara yang terbukti paling aman adalah menggunakan mikrotik.

Caranya :

1. Buka mikrotik anda dengan winbox atau bagi yang belum punya winbox dapat download disini

2. Klik New Terminal
3. Copy paste script dibawah ini

/ ip firewall filter 

add chain=input connection-state=releated action=accept comment=”Allow releated connections”
add chain=input connection-state=established action=accept comment=”Allow established connections”

add chain=forward connection-state=releated action=accept comment=”Allow releated connections”
add chain=forward connection-state=established action=accept comment=”Allow established connections” 
add chain=forward connection-state=invalid action=drop comment=”Drop invalid connections”

4. Setting untuk port  dengan action drop semua port yang biasa dilewati oleh virus.

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 Conficker Worm”
add chain=virus protocol=tcp dst-port=593 action=drop comment=”Drop Kido Worm”
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 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”

5. Agar setting firewall  mikrotik kita di atas bisa berjalan dan bekerja memblokir virus, worm atau spam, maka di paling akhir perlu kita tambahkan setting dibawah ini.

add chain=forward action=jump jump-target=virus comment=”jump to the virus chain”

Perhatikan apakah setting anda berhasil atau tidak dengan melihat ada paket yang keluar masuk atau tidak. Jika ada berarti settingan kita berhasil, jika tidak silahkan cek lagi. 
Semoga bermanfaat.