You can find the Admin Username and Password printed on the sticker attached to the side, back or bottom of the modem.
CAUTION!Do not remove your modem sticker. It includes your default Admin Username and Admin Password, which cannot be retrieved if lost. Your modem could become unusable without them.
4. Select Advanced Setup in the main menu.
5. Select IPv6 Firewall in the left sidebar.
6. Follow the steps to set up the IPv6 firewall.
Step 1: Enable/Disable stealth mode. Do not enable stealth mode unless you fully understand the impact.
Step 2: Enable the firewall.
Step 3: Choose to allow/block incoming and outgoing traffic on the network.
Step 4: Click "Apply" to save your changes.
About "Stealth Mode": Stealth mode prevents the router from responding to probing requests. The router will still answer incoming requests for authorized apps. Unexpected requests, such as ICMP (ping) are ignored. Do not enable Stealth Mode unless you understand the technical impacts.