To integrate ntopng with Proxmox in Ubuntu using the CLI, follow these steps:

1. First, ensure your Ubuntu system is up-to-date:

2. Install ntopng and its dependencies:

3. After installation, stop the ntopng service:

4. Now, we need to configure ntopng to work with Proxmox. Edit the ntopng configuration file:

5. In the configuration file, add or modify the following lines:

This configuration assumes that vmbr0 is your Proxmox bridge interface. Adjust if necessary.

6. Save and exit the editor (in nano, press Ctrl+X, then Y, then Enter).
7. Next, we need to ensure ntopng can access the Proxmox network interface. Edit the ntopng systemd service file:

8. Add the following line under the [Service] section:

9. Save and exit the editor.
10. Reload the systemd daemon to apply changes:

11. Start ntopng and enable it to start on boot:

12. Check if ntopng is running correctly:

13. If everything is set up correctly, you should be able to access the ntopng web interface by opening a web browser and navigating to:

Replace your_proxmox_ip with the actual IP address of your Proxmox server.

14. To ensure ntopng can monitor all traffic on the Proxmox host, you may need to configure Proxmox to use a bridge for VM networking if it's not already set up. This is typically done during Proxmox installation, but if you need to do it manually, you can edit the /etc/network/interfaces file on the Proxmox host.

Remember to replace any interface names or IP addresses in these instructions with the appropriate values for your specific Proxmox setup.

This integration will allow ntopng to monitor network traffic on your Proxmox host, providing valuable insights into your virtualized environment's network usage and performance.

To monitor all the hosts in your Proxmox cluster using ntopng, you don't need to add each host manually. Instead, you can configure ntopng to monitor the main network interface of your Proxmox cluster. This approach will allow you to see traffic from all VMs and containers running on the Proxmox hosts. Here's how you can set this up:

1. Identify the main network interface: Usually, this is the bridge interface that Proxmox uses for VM traffic. It's often named vmbr0, but you should verify this on your system.

   You can check your network interfaces by running:

   ip a

   Look for the bridge interface, which is likely to be vmbr0.

2. Update ntopng configuration: Edit the ntopng configuration file:

   sudo nano /etc/ntopng/ntopng.conf

   Modify or add these lines:

   -i=vmbr0 --interface-name-map="vmbr0=Proxmox Cluster Traffic" -w=3000 -d=/var/lib/ntopng

   Replace vmbr0 with your actual bridge interface name if it's different.

3. If you have multiple Proxmox nodes in your cluster, you'll need to install and configure ntopng on each node. However, you only need to monitor the main bridge interface on each node.

4. For a more comprehensive view of your entire Proxmox cluster, you might want to consider using ntopng's NetFlow/sFlow capabilities:

   a. Configure your Proxmox nodes to send NetFlow or sFlow data to a central ntopng instance.

   b. On each Proxmox node, install a NetFlow or sFlow exporter. For example, you can use nprobe for NetFlow:

   sudo apt install nprobe

   c. Configure the exporter to send data to your central ntopng instance. Edit the nprobe configuration:

   sudo nano /etc/nprobe.conf

   Add a line like this:

   -n=192.168.1.100:2055

   Replace 192.168.1.100 with the IP of your central ntopng server.

   d. On your central ntopng server, configure it to receive NetFlow data:

   In /etc/ntopng/ntopng.conf, add:

   -i=tcp://127.0.0.1:2055

5. Restart ntopng on all nodes where you made changes:

   sudo systemctl restart ntopng

By following these steps, ntopng will monitor all traffic passing through the main network interface of each Proxmox node. This includes traffic from all VMs and containers, giving you a comprehensive view of your entire Proxmox cluster's network activity without having to add each host manually.

Remember to adjust firewall rules if necessary to allow NetFlow/sFlow traffic between your Proxmox nodes and the central ntopng instance.

This setup will provide you with a centralized view of all network traffic in your Proxmox cluster, making it easier to monitor and analyze the network usage of all your hosts and VMs.