This tutorial will guide you to set up a new user and to configure the firewall with UFW on Ubuntu 18.04.
First, log into your Ubuntu as root user and then go to your SSH or Ubuntu terminal.
Adding a new user
Add the user by using
adduser command as shown below. Use any preferred name you like after
adduser command and you will be asked to create and verify a password for the user.
Next you’ll be asked to fill in some information about the new user.
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Changing the user information for bishrulhaq Enter the new value, or press ENTER for the default Full Name : bishrulhaq Room Number : Work Phone : Home Phone : Other : Is the information correct? [Y/n]
Next use the
usermod command to add the user to the sudo group. On Ubuntu, all members of the sudo group have full
usermod -aG sudo bishrulhaq
Enabling SSH access for newly added User
If you’re using SSH to access the server and password authentication is enabled then you need to copy your local public key to the new user’s
~/.ssh/authorized_keys file to log in successfully.
To copy the files with the correct permissions is by using the
rsync command. This helps to copy the root user’s
.ssh directory and to copy the permissions, modify the file owners with a single command.
rsync --archive --chown=bishrulhaq:bishrulhaq ~/.ssh /home/bishrulhaq
Setting Up a Firewall with UFW
Uncomplicated Firewall (UFW) is an interface to iptables that is designed to simplify the process of configuring a firewall and it is used to allow connections to specified services.
Type the following command to check the list of profiles registered with UFW.
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ufw app list
It will return with the list of available applications and I’m going to allow OpenSSH by typing the following command.
ufw allow OpenSSH
Then, You can enable the firewall by typing the command.
Check the status of allowed connections by typing:
The firewall will block all the connections except the one you have allowed. If you install any new services you need to allow the connection in order to use it.
Hope this article helped you 😊. If you like this please share with others and drop your ideas and suggestions at the comment section.