User's Manual

Internet and Broadband Settings

ProSafe Wireless-N 8-Port Gigabit VPN Firewall FVS318N

enabling and configuring Intra-Site Automatic Tunnel Addressing Protocol (ISATAP)

tunneling.

ISATAP is a LAN tunnel mechanism in which the IPv4 network functions as a virtual IPv6

local link. Each IPv4 address is mapped to a link-local IPv6 address, that is, the IPv4 address

is used in the interface portion of the IPv6 address. ISATAP tunneling is used intra-site, that

is, between addresses in the LAN. For more information about link-local addresses, see

Manage the IPv6 LAN on page 70.

Note: If you do not use a stateful DHCPv6 server in your LAN, you need to

configure the Router Advertisement Daemon (RADVD), and set up

ISATAP advertisement prefixes (which are referred to as

Global/Local/ISATAP prefixes) for ISATAP tunneling to function

correctly. For more information, see

Manage the IPv6 LAN on

page 70.

The wireless VPN firewall determines the link-local addr

ess by concatenating the IPv6

address with the 32 bits of the IPv4 host address:

• F

or a unique global address:

fe80:0000:0000:0000:0000:5efe (or fe80::5efe) is concatenated with the IPv4 address.

or example, fe80::5efe with 10.29.33.4 becomes fe80::5efe:10.29.33.4, or in

hexadecimal format, fe80::5efe:a1d:2104.

• F

or a private address:

fe80:0000:0000:0000:0200:5efe (or fe80::200:5efe) is concatenated with the IPv4

ddress. For example, fe80::200:5efe with 192.168.1.1 becomes

fe80::200:5efe:192.168.1.1, or in hexadecimal format, fe80::200:5efe:c0a8:101.

 To configure an ISATAP tunnel:

1. Select Network Configuratio

n > WAN Settings > ISATAP Tunnels. The ISATAP

Tunnels screen displays. (The following figure shows some examples.)

Figure 22.