How to Customize SSH Settings For Maximum Security

How to Customize SSH Settings For Maximum Security

1. sudo nano /etc/ssh/ssh_config.
2. sudo chown root:root /etc/ssh/sshd_config sudo chmod og-rwx /etc/ssh/sshd_config.
3. ssh [email protected] -p 22222.
4. Host dev HostName dev.example.com Port 22222 User foobar IdentityFile ~/.ssh/dev.example.key.
5. ssh -i ~/.ssh/dev.example.key [email protected] -p 22222.

1. How do I make ssh more secure?
2. How do I change SSH settings?
3. How do I harden SSH server?
4. What is SSH strict mode?
5. Is SSH dangerous?
6. Is SSH hack possible?
7. How do I SSH to a specific port?
8. Should I change the default SSH port?
9. Can we change SSH port?
10. How do I harden SSH in Ubuntu?
11. How secure is OpenSSH?
12. How do I harden Ubuntu 18.04 Server?

How do I make ssh more secure?

10 Steps to Secure Open SSH

1. Strong Usernames and Passwords. ...
2. Configure Idle Timeout Interval. ...
3. Disable Empty Passwords. ...
4. Limit Users' SSH Access. ...
5. Only Use SSH Protocol 2. ...
6. Allow Only Specific Clients. ...
7. Enable Two-Factor Authentication. ...
8. Use Public/Private Keys for Authentication.

How do I change SSH settings?

Procedure to change the SSH Port for Linux or Unix Server

1. Open the terminal application and connect to your server via SSH.
2. Locate sshd_config file by typing the find command.
3. Edit the sshd server file and set Port option.
4. Save and close the file.
5. Restart the sshd service to change the ssh port in Linux.

How do I harden SSH server?

1. Set idle timeout interval. The idle timeout interval is is the amount of time in which an ssh session is allowed to sit idle. ...
2. Disable empty passwords. There are some system user accounts that are created without passwords. ...
3. Disable X11 forwarding. ...
4. Limit max authentication attempts. ...
5. Disable SSH on desktops.

What is SSH strict mode?

Enable Strict (Forced Security) Mode

Ssh key, configuration files ownership, permission checks are performed before ssh daemon starts. If one of them fails the ssh server daemon does not starts. Strict mode is enabled by default but generally closed by system administrators. For security reasons, it should be enabled.

Is SSH dangerous?

Careless Users: When users are authorized to use SSH public key authentication, they can be careless in their handling of their private keys, either placing them in insecure locations, copying them to multiple computers, and not protecting them with strong passwords.

Is SSH hack possible?

SSH is one of the most common protocols in use in modern IT infrastructures, and because of this, it can be a valuable attack vector for hackers. One of the most reliable ways to gain SSH access to servers is by brute-forcing credentials.

How do I SSH to a specific port?

Just use the option to the right of the address. Side note: if you're using the command line ssh client, you can specify the port as ssh -p <port> user@server . The port does not appear at the end of the address like it does in other URI schemes.

Should I change the default SSH port?

Changing the default SSH port adds an extra layer of security to your server by reducing the risk of automated attacks. This tutorial explains how to change the default SSH port in Linux. We will also show you how to configure your firewall to allow access to the new SSH port.

Can we change SSH port?

Changing the SSH port number

Log in to the server as root using SSH. Open the /etc/ssh/sshd_config file in your preferred text editor (nano, vi, etc.). ... Change 7822 to the new port number that you want to use. Save the changes to the /etc/ssh/sshd_config file, and then exit the text editor.

How do I harden SSH in Ubuntu?

Secure the SSH server on Ubuntu

1. Change the default SSH port.
2. Use SSH2.
3. Use a whitelist and a blacklist to limit user access.
4. Disable root login.
5. Hide last login.
6. Restrict SSH logins to specific IP addresses.
7. Disable password authentication.
8. Disable .rhosts.

How secure is OpenSSH?

Conclusion. OpenSSH is the standard for secure remote access to *Unix-like servers, replacing the unencrypted telnet protocol. SSH (and its file transfer sub-protocol SCP) ensures that the connection from your local computer to the server is encrypted and secure.

How do I harden Ubuntu 18.04 Server?

The following tips and tricks are some easy ways to quickly harden an Ubuntu server.

1. Keep System Up-To-Date. ...
2. Accounts. ...
3. Ensure Only root Has UID of 0. ...
4. Check for Accounts with Empty Passwords. ...
5. Lock Accounts. ...
6. Adding New User Accounts. ...
7. Sudo Configuration. ...
8. IpTables.