•If your ISP did not provide details, use the 6to4 tunnel connection type (see Set Up an IPv6 6to4 Tunnel
Connection on page 57).
•If you are not sure what type of IPv6 connection the modem router uses, use the Auto Detect connection
type, which lets the modem router detect the IPv6 type that is in use (see Set Up an IPv6 Connection
Through Auto Detect on page 56).
•If your Internet connection does not use PPPoE, DHCP, a fixed IP address, or pass-through but is IPv6,
use the Auto Config connection type, which lets the modem router autoconfigure its IPv6 connection
(see Set Up an IPv6 Connection Through Auto Config on page 67).
When you enable IPv6 and select any connection type other than IPv6 pass-through, the modem router
starts the stateful packet inspection (SPI) firewall function on the WAN interface. The modem router creates
connection records and checks every inbound IPv6 packet. If the inbound packet is not destined to the
modem router itself and the modem router does not expect to receive such a packet, or the packet is not in
the connection record, the modem router blocks this packet. This function works in two modes: In secured
mode, the modem router inspects both TCP and UDP packets. In open mode, the modem router inspects
UDP packets only.
IPv6 addresses are denoted by eight groups of hexadecimal quartets that are separated by colons. You
can reduce any four-digit group of zeros within an IPv6 address to a single zero or omit it. The following
errors invalidate an IPv6 address:
•More than eight groups of hexadecimal quartets
•More than four hexadecimal characters in a quartet
•More than two colons in a row
Set Up an IPv6 Connection Through Auto Detect
If you are not sure what type of IPv6 connection the modem router uses, use the Auto Detect connection
type, which lets the modem router detect the IPv6 type that is in use.
To set up an IPv6 Internet connection through auto detection:
1. Launch a web browser from a computer or WiFi device that is connected to the network.
2. Enter http://www.routerlogin.net.
A login window opens.
3. Enter the modem router user name and password.
The user name is admin. The default password is password. The user name and password are
The BASIC Home page displays.
4. Select ADVANCED > Advanced Setup > IPv6.
The IPv6 page displays.
5. From the Internet Connection Type menu, select Auto Detect.
The page adjusts.
The modem router automatically detects the information in the following fields:
Manage the Internet Settings Manually
Nighthawk AC1900 WiFi VDSL/ADSL Modem Router Model D7000v2