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Asked On2019-08-02 06:45:52 by:Gaganpreet-Gandhi

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Take a second and answer this seemingly straightforward question – how many passwords do you have? Not so easy, is it?

Approximately 81% of confirmed data breaches are due to weak or stolen passwords. Make sure your password is strong and unique!

In this article, we dive into brute force attacks — what they are, how hackers are using them, and prevention techniques.

tutorial on preventing brute force attacks
What is a Brute Force Attack
A brute force attack is among the simplest and least sophisticated hacking method. As the name implies, brute force attacks are far from subtle. The theory behind such an attack is that if you take an infinite number of attempts to guess a password, you are bound to be right eventually.

The attacker aims to forcefully gain access to a user account by attempting to guess the username/email and password. Usually, the motive behind it is to use the breached account to execute a large-scale attack, steal sensitive data, shut down the system, or a combination of the three.

Creating code that executes this type of attack doesn’t take much imagination or knowledge, and there are even widely available automated tools that submit several thousand password attempts per second.

How to Identify Brute Force Attacks
A brute force attack is easy to identify and investigate. You can detect them by looking into your Apache access log or Linux log files. The attack will leave a series of unsuccessful login attempts, as seen below:

Sep 21 20:10:10 host proftpd[25197]: yourserver (usersip[usersip]) - USER theusername (Login failed): Incorrect password.

Does Locking-Out Accounts Work?
Locking out accounts after a certain number of incorrect password attempts is a common practice of dealing with brute force attempts. Unfortunately, that alone is not always sufficient.

Hackers can launch wide-scale attacks by trying a single password on several thousand servers. As opposed to attempting many passwords on a single server, this method does not trigger the account lockout, and it cleverly bypasses this defensive mechanism.

For example, if a server were under attack frequently, several hundred user accounts could be locked-out constantly. Your server would be easy prey for denial-of-service. Be proactive to detect and stop DDoS attacks.

Answerd on:2019-08-05 Answerd By:Ak

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