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Secure apache port.

How to secure Apache’s port (8085) using iptables on the app hosts while allowing access only from a single server.

Step 1: Install iptables and Dependencies

  1. Update the system: bash sudo yum update -y
  2. Install iptables: bash sudo yum install -y iptables-services

Step 2: Configure Firewall Rules

  1. Check the LBR host’s IP (Replace LBR_IP with actual IP): bash sudo iptables -A INPUT -p tcp --dport 8085 -s LBR_IP -j ACCEPT
  2. Block Everyone Else: bash sudo iptables -A INPUT -p tcp --dport 8085 -j DROP

Step 3: Save and Persist Rules

  1. Save the rules: bash sudo service iptables save
  2. Enable and Start iptables to persist across reboots: bash sudo systemctl enable iptables sudo systemctl start iptables

Step 4: Verify Firewall Rules

  1. List active rules: bash sudo iptables -L -n
  2. Test the firewall by accessing port 8085.

Now, port 8085 is secured, allowing only the LBR host, and rules persist across reboots! 🚀 Let me know if you need any refinements.