Table of Contents

1. Challenge

   Create a New Directory for the Back End and Move `app.py` to the Newly-Created Directory

   mkdir /home/cloud_user/Backend
   

   sudo mv /home/cloud_user/HardeningApache-master/app.py /home/cloud_user/Backend/
   

   sudo chown cloud_user:cloud_user /home/cloud_user/Backend/app.py
   

2. Challenge

   Install Dependencies: python36.x86_64, python36-devel.x86_64, "Development Tools", python36-pip, Flask, flask-cors, psutil, and tcpdump, then Open Port 65535 with `firewalld`

   sudo yum install epel-release
   

   sudo yum update
   

   sudo yum install python36
   

   sudo yum install python36-devel
   

   sudo yum groupinstall "Development Tools"
   

   sudo yum install python36-pip
   

   ln -s /usr/local/bin/pip3 /usr/bin/pip3
   

   sudo pip3 install Flask
   

   sudo pip3 install flask-cors
   

   sudo pip3 install psutil
   

   sudo yum install tcpdump
   

   sudo firewall-cmd --permanent --add-port=65535/tcp
   

   sudo firewall-cmd --reload
   

3. Challenge

   Create a systemd File for Our Back End Called "flaskapp.service" in `/etc/systemd/system/`

   sudo vim /etc/systemd/system/flaskapp.service
   

   [Unit]
   Description=API_Backend
   After=network.target
   
   [Service]
   User=root
   Group=root
   WorkingDirectory=/home/cloud_user/Backend
   Environment=FLASK_ENV=development
   Environment=FLASK_APP=/home/cloud_user/Backend/app.py
   ExecStart=/usr/local/bin/flask run -h 0.0.0.0 -p 65535
   Restart=always
               
   [Install]
   WantedBy=multi-user.target
   

   Save and Close

   sudo systemctl daemon-reload
   

   sudo systemctl start flaskapp
   

   sudo systemctl enable flaskapp
   

4. Challenge

   Configure the Front End to Be Able to Access the Back End and Test If the Back End Works

   vim /var/www/html/index.html
   

   Insert the Server Public IP address here

   var base_url = 'http://<Server_Public_IP>:65535';
   

   Save and close

   ESC
   :wq
   ENTER
   

   Test if it works

   curl http://<Server_Public_IP>:65535/log_messages