What is the best way to secure SSH Server Connections on Linux ?

What is the best way to secure SSH Server Connections on Linux ?

All SSH traffic is encrypted and secured. SSH provides password or public-key based authentication and encrypts connections between two network endpoints.

To make it more secure do the followings:
1. Disable "Root Login"
2. Use TCP port 33001 instead of port 22
3. disable all kinds of SSH tunneling
4. Always update all public and private key authentication

The best and recommended ways to secured it is always check and update the public and private key authentication. And use SSH key login

Few best practices Securing Linux SSH Server Connections

• Disable Root User Logins.
• Modifying the Default Port...
• Access is denied to users with blank passwords.
• Limit the number of login attempts.
• Using SSH Version 2. ...
• Disabling TCP Port Forwarding and X11 Port Forwarding.
• Connecting With an SSH Key...
• IP Limitations for SSH Connections
  
  

also we need to configure access key that will help to secure connection in the best possible way

You can secure your SSH server connections on Linux.
1. Disabling Root User Logins
2. Changing the Default Port
3. Block Access for Users With Blank Passwords
4. Limit Login/Access Attempts
5. Use SSH Version 2
6. Turning Off TCP Port Forwarding and X11 Forwarding
7. Connect with an SSH Key
8. SSH Connections (IP Restrictions)

disabling root user login
user ssh version 2
limit loging and access attemps

The best way to secure SSH Server connections on Linux is to use public/private key authentication and disable password authentication. Additionally, you should use strong passwords, limit root access, and limit the number of connection attempts. Configure the SSH server to use a non-standard port, and use a firewall to restrict access to only authorized IPs. Lastly, use two-factor authentication and regularly monitor the system for any suspicious activity.

The best advice is "Disabling Root User Logins"

Recommended to check the followings:
1. Disable the Root Login
2. Use SSH key on login
3. Changing the default port

1. Open the SSH configuration file. /etc/ssh/sshd_config.
2. Add the TCP/33001 SSH port and close TCP/22.
3. Disable non-admin SSH tunneling.
4. Update authentication methods.
5. Disable root login.
6. Restart the SSH server to apply new settings.
7. Review your logs periodically for attacks.