Suppose the device cannot access the Internet, but a LAN server serves as a proxy to access the Internet. In that case, you can set a proxy server, allowing the device to access the Internet using the LAN proxy server and update the patch.

After the proxy server is configured and the device can use it to access the WAN normally, the device can obtain a patch by following the same steps as those in the preceding two scenarios. This section only describes how to configure a proxy server.

Step 1.Go to System > Maintenance > Service Packs and click Settings, as shown in the following figure.

Step 2.Select Enable proxy server and enter the IP Address and Port of the proxy server. If the username and password are required when the device connects to the proxy server, select Authentication required and enter the Username and Password to be verified by the proxy server. Users provide the username and password.