To block ChatGPT from accessing your internet,follow these steps:

1. Determine Your Needs: Decide whether you want to use a public VPN (for accessing public networks) or a private VPN (for accessing private networks). A public VPN allows you to stay within your local network, while a private VPN lets you access the internet outside your local network.

2. Choose a VPN: Consider using a public VPN like Tor or NetNanny or a private VPN like NetNanny. Tor is recommended for staying within your local network, while a private VPN is suitable for accessing the internet outside your network.

3. Install the VPN: Install the chosen VPN on your computer. If using a public VPN, you may need to access it over the internet, especially if you're using a Wi-Fi connection.

4. Block Connections: Use the VPN to block connections to your local network. Tor and NetNanny are designed to allow blocking Tor, preventing access to your local network.

5. Use the VPN: Connect to ChatGPT using the VPN. This will block access to your local network and any public Tor connections.

6. Consider Security: Ensure you're using a secure VPN with strong encryption and features like adaptive routing and privacy filters to protect your account.

7. Evaluate Budget: Check if you need a subscription or can use a free VPN. Ensure it meets your security needs.

8. Avoid Non-Necessary Use: If not needed, consider whether using ChatGPT for accessing your account is necessary and secure.

By following these steps, you can effectively block ChatGPT from accessing your internet, ensuring your account is secure and protected.