We at 1&1 IONOS take account security very seriously. In order to protect the login to your 1&1 IONOS account, we react immediately to suspicious activities such as brute force attacks.
In a brute force attack, attackers attempt to crack a password by using software that executes as many character combinations as possible in rapid succession. Using a high-performance computer, the algorithm used tests a very large number of combinations in the shortest possible time.
A brute force attack is mainly successful with short passwords consisting only of letters, because then there are only a small number of combinations. This makes it much easier to guess the password.
1&1 IONOS Protects Your Account Against Brute Force Attacks
If several unsuccessful login attempts are made in a short period of time, we will check your identity to ensure that they are not illegal. You can either log in using a captcha or confirm your identity by email.
In the event of an extremely high or unusual number of login attempts, we will block your 1&1 IONOS account for a certain period of time. You can unblock your 1&1 IONOS account at any time by email. You can then log in again immediately.
These precautions on our part do not mean that the password for your 1&1 IONOS account has been compromised or hacked.
However, now is a good time to think about the security of your passwords. With a complex password, you make it considerably more difficult for attackers and thus make an important contribution to the security of your 1&1 IONOS account. The article "How to create a secure password" provides help for a secure password.