Zte F689 | Bridge Mode

Attempt to force bridge mode by submitting a POST request. Create a local HTML file with the following JavaScript (or use cURL in Linux/Mac):

List current WAN connections: sendcmd 1 DB p WANC

Open a new tab and directly access: http://192.168.1.1/cgi-bin/telnetenable.cgi – This may enable Telnet. Alternatively, navigate to Application > UPnP and inspect the page source or look for hidden WAN interface options. Zte F689 Bridge Mode

Create a new Bridge connection: sendcmd 1 DB set WANC 1 VLANID [Your_VLAN_ID] sendcmd 1 DB set WANC 1 ConnectType 2 (2 = Bridge, 1 = Route) sendcmd 1 DB set WANC 1 Enable 1 sendcmd 1 DB save reboot

Hidden menu: http://192.168.1.1/web_shell_cmd.gch If this page loads, type: sendcmd 1 DB set TelnetCfg 0 TS_Enable 1 and sendcmd 1 DB set TelnetCfg 0 Lan_Enable 1 . Then sendcmd 1 DB save . Attempt to force bridge mode by submitting a POST request

Disclaimer: Modifying your ZTE F689 may void your ISP's support agreement. Ensure you have physical backup access before executing commands.

Date: October 2023 Target Device: ZTE F689 (GPON/EPON ONT/ONU) Difficulty Level: Moderate Introduction: Why Bridge Mode? The ZTE F689 is a common Optical Network Terminal (ONT) deployed by Internet Service Providers (ISPs) worldwide, including Claro, Telmex, Tigo, and various Asian carriers. By default, this device acts as a "combo box"—a modem, router, switch, and Wi-Fi access point all in one. Create a new Bridge connection: sendcmd 1 DB

Press the reset button (pinhole) on the back for 30 seconds. This restores universal default credentials: admin / admin or root / Zte521 .