Yes, there are several technologies that can permanently disable Internet access to a computer without damaging the hardware. The following are feasible solutions, the specific choice depends on the usage scenario and technical authority： --- ### **1. Network layer control (recommended)** -**Router/firewall blocked** Prohibit devices from connecting to the Internet through **MAC address filtering** or **IP address blacklist** on routers or firewalls. Even if the device changes its IP or tries other network settings, as long as the MAC address is blocked, it will not be able to connect to the Internet. **Advantages**: No need to touch the target device, suitable for enterprise or home networks. **Requirements**: Administrative rights of network devices are required. -**Network access Control (NAC)** In an enterprise environment, devices can be prevented from accessing the network through **802.1 X authentication** or **certificate revocation**. The device needs to pass authentication to be connected to the Internet, and its certificate can be permanently disabled by revoking it. --- ### **2. Operating system-level restrictions** -**Local firewall rules** Configure a firewall (such as Windows firewall or Linux iptv) on the target computer to block all outbound/inbound connections. It is necessary to cooperate with the administrator permission lock setting to prevent users from modifying the rules. **Script example (Windows)**： ```powershell # Block all outbound traffic New-NetFirewallRule -DisplayName "Block Internet" -Direction Outbound -Action Block ``` -**Group policy/registry modification** In an enterprise domain environment, force the network adapter to be disabled or restrict network access through **Group policy (GPO)**, and restrict user modification permissions. -**Modify the Hosts file** Resolve all domain names to invalid IPS (such as `127.0.0.1`), but this method may be bypassed (such as using IP direct connection or VPN). --- ### **3. BIOS/UFI settings** -**Disable the network adapter** Enter the BIOS/UEFAI interface and disable the wired network card or wireless network card (such as a Wi-Fi/Ethernet controller). **Advantages**: System-level restrictions, BIOS password protection is required to prevent recovery. **Note**: Some devices may not be completely disabled, you need to confirm hardware support. --- ### **4. Physical method (non-destructive)** -**Remove/disable network card** For desktop computers, the wireless network card can be physically unplugged or the Ethernet port on the motherboard can be disabled (via BIOS or jumper settings). **Note**: It is necessary to ensure that the hardware is not damaged, and it is only achieved through software or reversible operation. --- ### **5. Equipment management system (MDM)** -**Enterprise equipment management** Use **Mobile Device Management (MDM)** or **Terminal management software** (such as Microsoft Intune) to enforce the push policy and disable network functions. You need to install the agent on the device in advance. --- ###**Key precautions** -**Permission requirements**: Most methods require administrator rights or network control. -**Persistence**: If the user reinstalls the system or resets the network settings, some restrictions may be invalid. It is recommended to combine multi-layer control (such as router blocking + local firewall). -**Law and ethics**: Ensure that operations comply with local laws and privacy policies and are only used for authorized equipment. --- Choose the appropriate solution according to your scenario. For example, **Home users**can block MAC addresses through routers, **Enterprise IT administrators**Recommend combining group policy and NAC to achieve more thorough control.