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LAN Configuration
71
ProSafe Wireless-N 8-Port Gigabit VPN Firewall FVS318N
Stateless DHCPv6 Server With Prefix Delegation
As an option for a stateless DHCPv6 server, you can enable prefix delegation. The ISP’s
stateful
DHCPv6 server assigns a prefix that is used by the wireless VPN firewall’s
stateless
DHCPv6 server to assign to its IPv6 LAN clients.
Prefix delegation functions in the following way:
1.
The wireless VPN firewall’s DHCPv6 client requests prefix delegation from the ISP.
You need to select the Prefix Delegation check box on the ISP Broadband Settings
screen for IPv6 (see
Use a DHCPv6 Server to Configure an IPv6 Internet Connection
on
page 37).
2.
The ISP allocates a prefix to the wireless VPN firewall.
This prefix is automatically added to the List of Prefixes for Prefix Delegation table on the
LAN Setup screen for IPv6 (see
IPv6 LAN Prefixes for Prefix Delegation
on page 76).
3.
The stateless DHCPv6 server allocates the prefix to the IPv6 LAN clients through the
RADVD. When prefix delegation is enabled, the RADVD advertises the following prefixes:
•
The prefix that was added through prefix delegation.
•
Prefixes that you manually added to the List of Prefixes for Prefix Delegation table on
the LAN Setup screen for IPv6.
•
Prefixes that you manually added to the List of Prefixes to Advertise table on the
RADVD screen.
You need to perform the following tasks:
•
Select the Prefix Delegation check box on the LAN Setup screen for IPv6 (see
Configure the IPv6 LAN
on page 72).
•
Configure the RADVD (see
Configure the IPv6 Router Advertisement Daemon and
Advertisement Prefixes for the LAN
on page 77).
•
Optionally, manually add prefixes to the List of Prefixes for Prefix Delegation table on
the LAN Setup screen for IPv6 (see
IPv6 LAN Prefixes for Prefix Delegation
on
page 76).
•
Optionally, manually add prefixes to List of Prefixes to Advertise table on the RADVD
screen (see
Advertisement Prefixes for the LAN
on page 79).
Stateful DHCPv6 Server
The IPv6 clients in the LAN obtain an interface IP address, configuration information such as
DNS server information, and other parameters from the DHCPv6 server. The IP address is a
dynamic address. For stateful DHCPv6, you need to configure IPv6 address pools (see
IPv6
LAN Address Pools
on page 74).
Page 72 / 414
LAN Configuration
72
ProSafe Wireless-N 8-Port Gigabit VPN Firewall FVS318N
Configure the IPv6 LAN
To configure the IPv6 LAN settings:
1.
Select
Network Configuration > LAN Setup
.
2.
In the upper right of the screen, select the
IPv6
radio button. The LAN Setup screen displays
the IPv6 settings. (The following figure contains some examples.)
Figure 36.
Page 73 / 414
LAN Configuration
73
ProSafe Wireless-N 8-Port Gigabit VPN Firewall FVS318N
3.
Enter the settings as explained in the following table. The IPv6 address pools and prefixes
for prefix delegation are explained in the sections following the table.
Table 12.
LAN Setup screen settings for IPv6
Setting
Description
IPv6 LAN Setup
IPv6 Address
Enter the LAN IPv6 address. The default address is FEC0::1.(For more information,
see the introduction to this section,
Manage the IPv6 LAN
.)
IPv6 Prefix Length
Enter the IPv6 prefix length, for example, 10 or 64. The default prefix length is 64.
DHCPv6
DHCP Status
Specify the status of the DHCPv6 server:
•
Disable DHCPv6 Server
. This is the default setting, and the DHCPv6 fields are
masked out.
•
Enable the DHCPv6 Server
. If you enable the server, you need to complete the
DHCPv6 fields.
DHCP Mode
Select one of the DHCPv6 modes from the drop-down list:
•
Stateless
. The IPv6 clients generate their own IP address by
using a combination of locally available information and router
advertisements, but receive DNS server information from the
DHCPv6 server. For stateless DHCPv6, you need to configure
the RADVD and advertisement prefixes (see
Configure the
IPv6 Router Advertisement Daemon and Advertisement
Prefixes for the LAN
on page 77). As an option, you can
enable prefix delegation (see the explanation further down in
this table).
•
Stateful
. The IPv6 clients obtain an interface IP address,
configuration information such as DNS server information, and
other parameters from the DHCPv6 server. The IP address is a
dynamic address. You need to add IPv6 address pools to the
List of IPv6 Address Pools table on the LAN Setup screen (see
IPv6 LAN Address Pools
on page 74).
Prefix Delegation
If you have selected the
stateless
DHCPv6 mode, you can select
the Prefix Delegation check box:
•
Prefix delegation check box is selected
. The stateless
DHCPv6 server assigns prefixes to its IPv6 LAN clients. Make
sure that the Prefix Delegation check box on the ISP
Broadband Settings screen for IPv6 is also selected (see
Use
a DHCPv6 Server to Configure an IPv6 Internet Connection
on
page 37) to enable the wireless VPN firewall to acquire a prefix
from the ISP through prefix delegation. In this configuration, a
prefix is automatically added to the List of Prefixes for Prefix
Delegation table at the bottom of the LAN Setup screen (see
IPv6 LAN Prefixes for Prefix Delegation
on page 76).
•
Prefix delegation check box is cleared
. Prefix delegation is
disabled in the LAN. This is the default setting.
Domain Name
Enter the domain name of the DHCP server.
Page 74 / 414
LAN Configuration
74
ProSafe Wireless-N 8-Port Gigabit VPN Firewall FVS318N
4.
Click
Apply
to save your changes.
IPv6 LAN Address Pools
If you configure a
stateful
DHCPv6 server for the LAN, you need to add local DHCP IPv6
address pools so the DHCPv6 server can control the allocation of IPv6 addresses in the LAN.
To add an IPv6 LAN address pool:
1.
On the LAN Setup screen for IPv6, under the List of IPv6 Address Pools table, click
Add
. The LAN IPv6 Config screen displays:
DHCP Status
(continued)
Server Preference
Enter the DHCP server preference value. The possible values
are 0–255, with 255 as the default setting.
This is an optional setting that specifies the server’s preference
value in a server advertise message. The client selects the
server with the highest preference value as the preferred server.
DNS Servers
Select one of the DNS server options from the drop-down lists:
•
Use DNS Proxy
. The wireless VPN firewall acts as a proxy for
all DNS requests and communicates with the ISP’s DNS
servers that you configured on the Broadband ISP Settings
(IPv6) screen (see
Configure a Static IPv6 Internet Connection
on page 39).
•
Use DNS from ISP
. The wireless VPN firewall uses the ISP’s
DNS servers that you configured on the Broadband ISP
Settings (IPv6) screen (see
Configure a Static IPv6 Internet
Connection
on page 39).
•
Use below
. When you select this option, the DNS server fields
become available for you to enter IP addresses.
Primary DNS Server
Enter the IP address of the primary
DNS server.
Secondary DNS Server
Enter the IP address of the secondary
DNS server.
Lease/Rebind Time
Enter the period after which the DHCP lease is renewed with the
original DHCP server or rebound with another DHCP server to
extend the existing DHCP lease. The default period is
86400 seconds (24 hours).
Table 12.
LAN Setup screen settings for IPv6 (continued)
Setting
Description
Page 75 / 414
LAN Configuration
75
ProSafe Wireless-N 8-Port Gigabit VPN Firewall FVS318N
Figure 37.
2.
Enter the settings as explained in the following table:
3.
Click
Apply
to save your changes and add the new IPv6 address pool to the List of IPv6
Address Pools table on the LAN Setup screen for IPv6.
To edit an IPv6 LAN address pool:
1.
On the LAN Setup screen for IPv6 (see
Figure 36
on page 72), click the
Edit
button in
the Action column for the address pool that you want to modify. The LAN IPv6 Config
screen displays.
2.
Modify the settings as explained in the previous table.
3.
Click
Apply
to save your settings.
To delete one or more IPv6 LAN address pools:
1.
On the LAN Setup screen for IPv6 (see
Figure 36
on page 72), select the check box to
the left of each address pool that you want to delete, or click the
Select All
table button
to select all address pools.
2.
Click the
Delete
table button.
Table 13.
LAN IPv6 Config screen settings
Setting
Description
Start IPv6 Address
Enter the start IP address. This address specifies the first of the contiguous
addresses in the IP address pool. Any new DHCPv6 client joining the LAN is
assigned an IP address between this address and the end IP address.
End IPv6 Address
Enter the end IP address. This address specifies the last of the contiguous
addresses in the IP address pool. Any new DHCPv6 client joining the LAN is
assigned an IP address between the start IP address and this IP address.
Prefix Length
Enter the IPv6 prefix length, for example, 10 or 64.

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