Setting Firewall Untuk Router Mikrotik

Pengamanan router mikrotik dari traffic virus dan excess ping dapat digunakan skrip firewall berikut :

Pertama buat address-list "ournetwork" yang berisi alamat IP radio, IP LAN dan IP WAN atau IP lainnya yang dapat dipercaya

Dalam contoh berikut alamat IP radio adalah = 10.0.0.0/16, IP LAN = 192.168.2.0/24 dan IP WAN = 203.89.24.0/21 dan IP lainnya yang dapat dipercaya = 202.67.33.7

Untuk membuat address-list dapat menggunakan contoh skrip seperti berikut ini tinggal disesuaikan dengan konfigurasi jaringan sobat.

Buat script berikut menggunakan notepad kemudian copy-paste ke console mikrotik

/ ip firewall address-list

add list=ournetwork address=203.89.24.0/21 comment="Datautama Network"

disabled=no

add list=ournetwork address=10.0.0.0/16 comment="IP Radio" disabled=no

add list=ournetwork address=192.168.2.0/24 comment="LAN Network" disabled=no

Selanjutnya copy-paste skrip berikut pada console mikrotik

/ 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, sebaiknya di didisable karena juga sering digunakan utk vpn atau

webmin" 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

Efek dari script di atas adalah:

 

1. Router mikrotik hanya dapat diakses FTP, SSH, Web dan Winbox dari IP yang didefinisikan dalam address-list "ournetwork" sehingga tidak bisa diakses dari sembarang tempat.

2. Port-port yang sering dimanfaatkan virus di blok sehingga traffic virus tidak dapat dilewatkan, tetapi perlu diperhatikan jika ada user yang kesulitan mengakses service tertentu harus dicek pada chain="virus" apakah port yang dibutuhkan user tersebut terblok oleh firewall.

3. Packet ping dibatasi untuk menghindari excess ping.

Selain itu yang perlu diperhatikan adalah: sebaiknya buat user baru dan password dengan group full kemudian disable user admin, hal ini untuk meminimasi resiko mikrotik sobat di hack orang.

wekeke.. dah ah..