Ensure , PPTP Passthrough , and L2TP Passthrough are all set to Enable . Click Submit or Save to apply changes. Step 3: Configure the Integrated VPN Server (Advanced) If your specific firmware supports it, you can set up the as a VPN server to access your home network remotely: Go to the Advanced or Internet tab. Select VPN Server and then PPTP VPN . Check the box to Enable VPN Server . Configure the following:
: Open a web browser and enter the router’s IP address (typically 192.168.1.1 ). Log in using your credentials; default values are often admin / admin or user / user . Configure VPN on ZTE F680
The ZTE F680 is a capable fiber modem but a poor VPN client. By understanding its limitations—passthrough yes, client no—you can choose the right workaround: a secondary VPN router (best), a shared PC connection (budget), or per-device apps (simple). Avoid bridge mode unless you have experience, and never attempt to flash custom firmware. Ensure , PPTP Passthrough , and L2TP Passthrough
Set a range (e.g., 192.168.1.200 to 192.168.1.210 ) that does not conflict with existing devices. Select VPN Server and then PPTP VPN
