How to protect your VPS server from SSH bot intrusions

There are several ways to secure your VPS server from SSH bot attacks:

• Set a strong password for the root account or administrator user.
• Changing the SSH port to something other than the default value (e.g. 22), which will make it more difficult for bots to attempt to log in automatically.
• Limiting the number of login attempts within a certain time period (e.g. by setting a limit on login attempts in the file /etc/ssh/sshd_config).
• Enabling two-factor authentication verification (e.g. by using Google Authenticator).
• Installing and configuring a firewall and anti-bot software such as Fail2ban which will limit unwanted connections.
• Regularly monitoring server logs for unauthorised login attempts.
• Backing up relevant data and regularly updating software.