Set up network filtering

Secure Web Gateway allows you to apply policies at the network level (Layers 3 and 4) to control which websites and non-HTTP applications users can access.

​​ 1. Connect to Gateway

​​ Connect devices

To filter network traffic from a device such as a laptop or phone:

1. Install the WARP client on your device.
2. In the WARP client Settings, log in to your organization’s Zero Trust instance.
3. (Optional) If you want to display a custom block page, install the Cloudflare root certificate on your device .
4. Enable the Gateway proxy:
   1. In the Zero Trust dashboard Open external link , navigate to Settings > Network.
   2. Enable Proxy for TCP.
   3. (Optional) Enable Proxy for UDP. All port 443 UDP traffic will be inspected by Gateway except when using QUIC. QUIC traffic will only be proxied.

​​ Connect private networks

To filter traffic from private networks, refer to the Cloudflare Tunnel guide.

​​ 2. Verify device connectivity

1. In the Zero Trust dashboard Open external link , navigate to Settings > Network.
2. Under Gateway logging, enable activity logging for all Network logs.
3. On your WARP-enabled device, open a browser and visit any website.
4. Determine the Source IP for your device:
   1. Open the WARP client settings.
   2. Navigate to Preferences > General.
   3. Note the Public IP.
5. In the Zero Trust dashboard, navigate to Logs > Gateway > Network. Before building Network policies, make sure you see Network logs from the Source IP assigned to your device.

​​ 3. Add policies

To create a new network policy, navigate to Gateway > Policies > Network in the Zero Trust dashboard. Refer to our list of common network policies for policies you may want to create.