#How to use config file for ssh on mac how to#
#How to use config file for ssh on mac password#

By default, these files reside in the /etc/ssh directory on the remote host. The SSH server has its own set of configuration files, including the SSH server system-wide configuration file named sshd_config. Step 3: To edit the config file, enter the command. Step 2: Then login to the Server using SSH. Step 1: Initially, open the ‘Terminal or Putty or Console’.

You can now log into your instance with the following command.įollow the below steps to edit the SSH config file.

Edit the file to add the following: Host: This is the shortcut name of your connection.

A second, user-specific ssh_config is found at “~/. Where is the SSH configuration file? On macOS systems, the configuration file is found at “/private/etc/ssh/ssh_config,” which is symlinked to “/etc/ssh/ssh_config” for compatibility.

Do you need to setup a SSH config file?.

#How to use config file for ssh on mac how to#

How to SSH on Mac with native SSH client?.

How do you create a config file on a Mac?.

How do you edit a config file on a Mac?.

You'll get denied, as none of our users are in group 'allowssh'. Locally, add a new Terminal tab ( DON'T LOG OUT OF YOUR CURRENT SESSION) and try to login again: ssh ssh-ex

Locally, log in as user 'fideloper' successfully: ssh -o 'User fideloper' ssh-exīack on the remote server, let's use the 'AllowGroups' directive instead: sudo vim /etc/ssh/sshd_configĪdd the 'AllowUsers' directive: # Comment out/remote 'AllowUsers' On the remote server, edit sshd_config and explicitly set which users can SSH into the server: sudo vim /etc/ssh/sshd_configĪdd the 'AllowUsers' directive: AllowUsers fideloper Locally, try to login as user 'root' again and see you get permission denied: ssh -o 'User root' ssh-ex Allow SSH login by user or group On the remote server, edit sshd_config and turn off the ability to login over SSH using password: sudo vim /etc/ssh/sshd_configĮdit the 'PasswordAuthentication' directive: # Uncomment and set to 'no'

#How to use config file for ssh on mac password#

This will ask for a password but tell is permission is denied, even if using the right password. Save that and restart SSH: sudo service ssh restartīack on our local computer, try to login as root again: ssh -o 'User root' ssh-ex sudo vim /etc/ssh/sshd_configĭisable the login of user root: # Change this to no Save that and then attempt to log into our server (again, from our local computer): ssh ssh-exĪnd we should get logged in as user 'fideloper'! Disable SSH login of user rootīack on the remote server, let's edit the sshd_config file some more and lock down who can login and how further. Then, once again locally, edit the ~/.ssh/config file to adjust user from 'root' to 'fideloper': # Edit local ssh config file: # On the remote server, edit authorized_keys To do so, we get our previously created id_sshex.pub (on our local computer) and paste it into the authorized_keys file of the new 'fideloper' user on the remote server. Next we want to make sure we can log into user 'fideloper'. Log in as user 'fideloper' # Chang into user fideloper: Then add user fideloper to group sudo, which allows that user to use 'sudo' commands: # Append secondary group 'sudo' # When done, check some items to see that user/group 'fideloper' exists: On the remote server, logged in as user root, we create a new user fideloper: adduser fideloper

We remove a vector of remote attack - root user cannot be logged into remotely.

This is missing when logged in as 'root' directly.

User then required to use their own password on top of that to run privileged commands via 'sudo'.

SSH key usually provides a first (separate) password needed, so attackers need both the SSH private key and knowledge of this password.

We don't want user root to be able to login over SSH, as that user has no limits in privileges.Ĭreating a new user, who can use 'sudo', but isn't the root user, adds security: I usually keep port on standard port 22 and use other security means to lock this down. We can then try to login from our local computer by adjusting the port to use: ssh -p 2222 ssh-ex Then restart SSH: sudo service ssh restart sudo vim /etc/ssh/sshd_configĬhange the Port option to something other than 22: # Formally 'Port 22' We can change the port users use to login away from port 22. SSH configuration is generally found in /etc/ssh/sshd_config. Let's now see some SSH options on the remote server, to see how we can affect who can log in and how. We'll log into a server and edit the /etc/ssh/sshd_config file, to change how users can use SSH to log into the server from remote locations.We previously have used our local ~/.ssh/config file to easily log into a server. Configure how SSH runs on the server for better security.