Several security vulnerabilities and cyber threats can disrupt a server’s functionality, resulting in downtimes and breaches. One of such most common vulnerabilities is SSH Brute Force Attacks.
Cybercriminals attempt these attacks to gain unauthorised access to your server by continuously guessing usernames and passwords until they get access.
So, how can one prevent themselves from such attacks?
In this article, we will discuss some essential measures and effective strategies which can be utilised for Brute Force Attack prevention.
Ways To Prevent SSH Brute Force Login Online Attacks On Your Website
- Use Strong Authentication Methods
It is necessary to employ strong authentication techniques to enhance the security against SSH Brute Force Attacks. Thus, consider incorporating Multi-Factor Authentication (MFA).
MFA requires users to provide two or more identification forms before granting access. It will help to protect your website from unauthorised access.
- Change the Default SSH Port
Another effective Brute Force Attack prevention technique is to modify the default SSH port, which attackers commonly target.
You can use a standard port, which discourages automated scanners from focusing on your server. However, don’t forget to inform your authorised users about the change while avoiding confusion.
- Use SSH Keys Instead of Passwords
Using SSH keys for passwords provides a more secure authentication method, as SSH keys can virtually eliminate the risk of Brute Force Attacks when properly configured and managed.
However, users must have their unique SSH keys, and the private keys should be stored securely on their local machines.
- Implement IP Whitelisting
You can also consider Implementing IP Whitelisting, as it limits SSH access to IP addresses or IP ranges you trust.
By doing so, you will effectively be able to block access from unauthorised sources and reduce potential vulnerabilities.
- Install and Configure Fail2Ban
Fail2Ban is a tool for preventing access as it monitors system logs and automatically blocks IP addresses that display suspicious activity, like multiple failed login attempts.
Thus, install and set up Fail2Ban to enhance security and configure it to monitor SSH login failures, which will help you to protect against SSH brute-force attacks effectively.
- Set Rate Limits
Setting up rate limiting for SSH login attempts will help you limit the number of login attempts from an IP address within a timeframe.
If the attempts exceed the limit, temporary access blockage will be imposed on that IP address.
- Update Your SSH Software
Make sure to keep your SSH software updated for security purposes. Developers regularly release updates that include fixes for vulnerabilities and overall security improvements.
Always use the version of SSH, and remember to check for updates regularly.
- Monitor SSH logs
Consistently monitor your SSH logs, as it will allow you to identify and respond to Brute Force Attacks promptly.
Pay attention to repeated login failure patterns and investigate such activities immediately.
Preventing SSH Brute Force Attacks requires ongoing monitoring, action and a layered security approach.
Thus, by following the practice mentioned above and investing in reliable Web Hosting services, you can significantly minimise SSH Brute Force Attacks and successfully secure your online presence and digital assets.