Learning Continuous Integration with Jenkins - Second Edition

Configuring the firewall on a Nginx server

We need to configure the firewall on our Nginx server to allow access to the Nginx service. Follow these steps:

1. Check the firewall status using the ufw command:

        sudo ufw status 

   You should see the following output:

        Status: inactive 

2. If it's enabled, move to step 3. But, if you find it disabled, then enable the firewall using the following command:

        sudo ufw enable  

   You should see the following output

        Command may disrupt existing ssh connections.        Proceed with operation (y|n)? y 
        Firewall is active and enabled on system startup 

3. List the available configurations using the following command. You should see three Nginx profiles and one OpenSSH profile:

        sudo ufw app list  

   You should ...