Being a server admin, it is a vital responsibility to protect the servers from different types of attacks. The most common one among them is the brute force attacks, where the attacker tries to login to the server or email or any password protected area using trial and error method. The most common form of a brute force attack is a dictionary attack. A person who is trying to get access to one of your accounts (web server, ftp, e-mail, ssh, etc.) uses a uses a list of common names and password combination with the help of an automated script.
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