Lock your computer when others try to guess your password

Saturday, 2 October 2010 by nkoknki | 0 comments

it91- As a user and computer management, you're sure to think the worst case occurs, for example when someone tries to probe a password based on your personal information. Here, network management will present some tips to help you fix and improve the situation.

Here, we will apply methods of Windows security to lock all user accounts within 30 minutes when a password is entered incorrectly three times that. This process makes the curious "penguin inspired" does not detect when the password repeatedly, or if more patience, they will take a long time.

Important Note: This setting can also be a "knife blade 2" when someone knowingly signed false and that the computer is locked for 30 minutes. So to really secure, you should create and use more than one parallel to the administrator account. However, you must be very careful when using this method.

Preliminary Note: others can still access the computer using interventions such as use Ubuntu Live CD, System Rescure CD or Ultimate Boot CD to reset all passwords, unless you apply to encrypt entire hard drive data with TrueCrypt or BitLocker.

Change the Local Security Policy settings

To change properties related to the password, use the Local Security Policy (note that this feature is only available on Windows Vista or 7 of the Business, Professional, Enterprise, and Ultimate. If you use the Starter, Home Basic, Home Premium or the need to use the Command Prompt below). To use the Local Security Policy, open the Start Menu and type the relevant keywords into the search box as follows:

Choose to Account Policies section at the left window and the Account Lockout Policy:

In default mode, your account will not be locked when the password entered incorrectly. To change this attribute, double-click Account lockout threshold:

In this dialog box, enter the password was limited. For example here is 3, click OK to save changes:

Windows will notify you if you want to change the time taken to lock the account - Account lockout duration and exact time - Reset account lockout counter. The default is 30 minutes, if you want you can change at will:

When you close the Local Security Policy, the command will take effect immediately. When you enter your password incorrectly three times that, the system will automatically lock all accounts within 30 minutes. If you want to redefine the parameters, you simply repeat the operation on:

Done with the Command Prompt

As mentioned above, if you are using Windows Home edition will not feature Local Security Policy, so must replace feature - Command Prompt. In the Start Menu, select Command Prompt and right click> Run as Administrator:

And type the following:

net accounts

This command will list the password policies to manage the current parameters Lockout threshold: Never means the account will not be locked when the password is incorrect:

Please change this parameter for the system to automatically lock the account when the password entered is correct:

net accounts /lockoutthreshold:3

As above, the account will be locked when you enter the wrong password three times in succession:

The next period is applicable, here we choose the 30 minutes:

net accounts /lockoutduration:30

And the waiting period to accurately account can log into the system, you should note the exact time to mold the above:

net accounts /lockoutwindow:30

When finished, you type the command net accounts to review the settings. And this is the result after setting up the command above:

Here, let us check that the system is working as expected or not. Enter any password (of course not exactly) to login:

Windows will display a message incorrect password, and re-entry:

And this is the result after we enter the password incorrectly three consecutive times:

If you want to log into Windows, you will have to wait for 30 minutes under the right set up inside. With the change of password management and flexibility, you will be much safer if no one can access or open a password on your computer in a short time. Wish you success!

According HowToGeek

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Lock your computer when others try to guess your password

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