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5. From the Internet Connection Type menu, select 6to4 Tunnel.
The modem router automatically detects the information in the Router’s IPv6 Address On LAN field. This field
shows the IPv6 address that is acquired for the modem router’s LAN interface. The number after the slash (/)
is the length of the prefix, which is also indicated by the underline (_) under the IPv6 address.
6. Select a Remote 6to4 Relay Router radio button:
• Auto.Your modem router uses any remote relay modem router that is available on the Internet. This is the
default setting.
• Static IP Address. Enter the static IPv4 (not IPv6) address of the remote relay modem router.Your IPv6
ISP usually provides this address.
7. Select an IP Address Assignment radio button:
• Use DHCP Server. The modem router assigns IPv6 addresses to the devices on your home network (the
LAN) through a DHCP server.This method passes more information to LAN devices, but some IPv6 systems
might not support the DHCPv6 client function. This is the default setting.
• Auto Config. The modem router automatically configures its IPv6 address based on the IPv6 protocol.
8. To specify the interface ID for the IPv6 address of the modem router’s LAN interface, select the Use This
Interface ID check box, and enter the interface ID.
If you do not specify an ID here, the modem router generates one automatically from its MAC address.
9. Select the IPv6 filtering mode:
• Secured. In secured mode, which is the default mode, the modem router inspects both TCP and UDP packets.
• Open. In open mode, the modem router inspects UDP packets only.
10. Click the Apply button.
Manage the Internet Settings Manually
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Nighthawk X4S AC2600 WiFi VDSL/ADSL Modem Router Model D7800