How do I restrict root login?

Posted on by David Darling

How do I restrict root login?

Enable or disable remote root login

  1. To enable remote root login, enter the following command: /etc/ssh/sshd_config: PermitRootLogin yes #enabled.
  2. To disable remote root login, enter the following command: /etc/ssh/sshd_config: PermitRootLogin no #disabled.

How do I restrict the root login in Linux?

The simplest method to disable root user login is to change its shell from /bin/bash or /bin/bash (or any other shell that permits user login) to /sbin/nologin , in the /etc/passwd file, which you can open for editing using any of your favorite command line editors as shown. Save the file and close it.

What command will allow you to disable SSH login?

SSH to the server with the new admin user and ensure that the login works. Verify that you can su (switch user) to root with the admin user. To disable root SSH login, edit /etc/ssh/sshd_config with your favorite text editor.

Why is it not suggested to allow root to login on directly using SSH?

Everyone knows that Linux systems come with root user access and by default, root access is enabled for the outside world. For security reasons, it’s not a good idea to have ssh root access enabled for unauthorized users. Because any hacker can try to brute force your password and gain access to your system.

How do I block a specific user SSH?

Disable SSH Root Access Open the file ‘/etc/ssh/sshd_config’ in any text editor and search for the string ‘PermitRootLogin’. Uncomment the line and if it has any other value, set the value to ‘no’. Now try logging in to localhost with user ‘root’. It will also show the error ‘Permission Denied’.

How do I block a user in SSH?

Procedure for disabling SSH login for root user Log in to the Linux or Unix server using ssh: ssh user@your-server. Edit the /etc/ssh/sshd_config file using vi. Set PermitRootLogin no to disable SSH logins for root. Save and close the file.

Should you disable root SSH?

For security reasons, it’s not a good idea to have ssh root access enabled for unauthorized users. Because any hacker can try to brute force your password and gain access to your system.

What are two ways to block SSH access?

The two tools in question are Uncomplicated Firewall (UFW) and TCP Wrappers. I’ll be demonstrating on Ubuntu Server 16.04, but the process is the same on most distributions. NOTE: If your distribution doesn’t make use of UFW, you’ll need to adjust this process, based on the firewall used.

How do I restrict SSH access for users from a specific IP address?

Here is how to restrict SSH access to certain IP addresses on a machine.

  1. Edit the /etc/hosts. allow file to include these lines, assuming your machine is on the 192.168.
  2. Edit your /etc/hosts.deny file to include this line:
  3. These lines refuse SSH connections from anyone not in the IP address blocks listed.

How do I restrict root access in Linux?

How do I restrict users in SSH?

Restrict certain users log onto a system via SSH server

  1. Step # 1: Open sshd_config file. # vi /etc/ssh/sshd_config.
  2. Step # 2: Add a user. Only allow user vivek to login by adding following line: AllowUsers vivek.
  3. Step # 3: Restart sshd. Save and close the file.

How do I restrict access to SSH?

To do that, perform teh following steps:

  1. Open file /etc/hosts.deny by using a text editor: vi /etc/hosts.deny.
  2. Add the following line to deny all incoming SSH connections to the server: sshd: ALL.
  3. Save and close the file.

How do I restrict traffic in SSH?

Method 1: Block SSH and FTP Access Using IPTables/FirewallD

  1. Block or Disable SSH Access.
  2. Unblock or Enable SSH Access.
  3. Block or Disable FTP Access.
  4. Unblock or Enable FTP Access.

How do I disable SSH access?

Quick Steps:

  1. Login to the server via SSH.
  2. Open the file “/etc/ssh/sshd_config” in any of your favorite text editors.
  3. Find the section in the file containing the line with “#PermitRootLogin yes” in it.
  4. Uncomment and change it to “PermitRootLogin no”.
  5. Save the file and exit.
  6. Restart the sshd service.

Should I disable root account?

Therefore, it is advisable to disable the root access in your Linux server, instead, create an administrative account which should be configured to gain root user privileges using the sudo command, to perform critical tasks on the server.