Anti Scanning Port pada Mikrotik

Scaning port pada server adalah salah satu teknik untuk mencari celah keamanan yang bisa dimanfaatkan oleh penyerang/intruder.

Di mikrotik kita bisa melakukan block terhadap serangan jenis ini dan sekaligus mengeblok ip asal penyerang , berikut scriptnya :

#---- script ---

/ip firewall filter add chain=input protocol=tcp psd=21,3s,3,1 action=add-src-to-address-list address-list="port scanners" address-list-timeout=2w comment="Port scanners to list " disabled=no
/ip firewall filter add chain=input protocol=tcp tcp-flags=fin,!syn,!rst,!psh,!ack,!urg action=add-src-to-address-list address-list="port scanners" address-list-timeout=2w comment="NMAP FIN Stealth scan"
/ip firewall filter add chain=input protocol=tcp tcp-flags=fin,syn action=add-src-to-address-list address-list="port scanners" address-list-timeout=2w comment="SYN/FIN scan"
/ip firewall filter add chain=input protocol=tcp tcp-flags=syn,rst action=add-src-to-address-list address-list="port scanners" address-list-timeout=2w comment="SYN/RST scan"
/ip firewall filter add chain=input protocol=tcp tcp-flags=fin,psh,urg,!syn,!rst,!ack action=add-src-to-address-list address-list="port scanners" address-list-timeout=2w comment="FIN/PSH/URG scan"
/ip firewall filter add chain=input protocol=tcp tcp-flags=fin,syn,rst,psh,ack,urg action=add-src-to-address-list address-list="port scanners" address-list-timeout=2w comment="ALL/ALL scan"
/ip firewall filter add chain=input protocol=tcp tcp-flags=!fin,!syn,!rst,!psh,!ack,!urg action=add-src-to-address-list address-list="port scanners" address-list-timeout=2w comment="NMAP NULL scan"

# block ip penyerang

/ip firewall filter add chain=input src-address-list="port scanners" action=drop comment="dropping port scanners" disabled=no

#---------- end

Selamat mencoba ;)

Read more »

Blokir Worm dan Virus di Mikrotik

Langsung aja, jalankan perintah berikut atau buat aja scriptnya ( t-x46 style ^_^ ).

============================================================

/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 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=3127-3128 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"


================================================================


good luck ;)

Read more »

Konfigurasi Mikrotik sebagai gateway Internet

Untuk menjadikan mikrotik sebagai gateway internet ikuti dan sesuaikan langkah-langkah berikut ;

========================================================
/interface set ether1 name=local
/interface set ether2 name=speedy1
/ip address add address add=192.168.1.1/24 interface=local
/ip address add address add=192.168.2.2/30 interface=speedy1
/ip dns set servers=203.134.193.74,202.134.0.155
/ip firewall nat add chain=srcnat out-interface=speedy1 action=masquerade

================================================================

oke untuk selanjutnya silahkan test koneksi internet anda dan pastikan IP di client sesuai dengan kelas di mikrotik (local)

good luck ;)

Read more »

Dial UP ADSL via Ubuntu

Untuk melakukan dial up ADSL via linux pastikan bahwa setting di modem sebagai bridge, untuk langkah-langkah perintah di linux sebagai berikut ;

1. sudo pppoeconf
selanjutnya ikuti perintah-perintah yang diberikan

2. masukkan username dan password speedy yang didapat dari isp

3. edit file sudo gedit /etc/ppp/options , dan ganti #mtu menjadi mtu 1460

4. jalankan perintah poff dsl-provider dan pon dsl-provider

ok good luck ;)

Read more »