Tag Archives: computer security

Changing MAC address of your network cards on Linux

See the current MAC values

erogol@erogol-G50V ~ $ ifconfig -a | grep Ethernet
eth0      Link encap:Ethernet  HWaddr 00:22:15:3a:36:93
wlan0     Link encap:Ethernet  HWaddr 00:15:af:dd:94:91

Stop running of the card

<pre ">erogol@erogol-G50V ~ $sudo ifconfig eth0 down

Change the MAC address

erogol@erogol-G50V ~ $ sudo ifconfig hw ether 00:22:15:3a:36:83

Start the card running again

erogol@erogol-G50V ~ $ sudo ifconfig eth0 up

That's all. You might see the new MAC address for check.

Why I need to change the MAC address. Continue reading Changing MAC address of your network cards on Linux

Firefox add-ons for your secure internet

Albeit internet is a one of the most influential data resource with smiling face,  it is also a whirlpool that tries to catch all your data from your computer to benefit some companies, hackers and others. Thus it is really a big need to keep your computer and the browser with secure setup as a gate to the cyberworld. For this aim, I try to point some extensions to your Firefox browser. Some will stop the hackers and some will stop the companies watching your private data for having more money sourcing by you. Continue reading Firefox add-ons for your secure internet

Hacker's first target file /etc/passwrd on Linux ! Why?

At Linux /etc/passwrd file includes information about the user accounts on the operating system.  Permissions and password (if not encrypted) related with specific user account are stored here with some extra information. Here is the general structure of the file with the needed explanation to interpret it: Continue reading Hacker's first target file /etc/passwrd on Linux ! Why?