Configure The Ipv4 Internet Connection And Wan Settings; Configure The Ipv4 Wan Mode - NETGEAR ProSAFE SRX5308 Reference Manual

6. (Optional) Configure the WAN options. If necessary, change the factory default MTU size,
port speed, and MAC address of the VPN firewall. These are advanced features, and you
usually do not need to change the settings.
These tasks are described in
page 71.
Configure the IPv4 Internet Connection and WAN
Settings
•

Configure the IPv4 WAN Mode

• Let the VPN Firewall Automatically Detect and Configure an IPv4 Internet Connection
• Manually Configure an IPv4 Internet Connection
• Configure Load Balancing or Auto-Rollover for IPv4 Interfaces
• Configure Secondary WAN Addresses
• Configure Dynamic DNS
To set up your VPN firewall for secure IPv4 Internet connections, you need to determine the
IPv4 WAN mode (see the next section) and then configure the IPv4 Internet connection to
your ISP on the WAN port. The web management interface offers two connection
configuration options, described in the following sections:
• Let the VPN Firewall Automatically Detect and Configure an IPv4 Internet Connection
page 31
• Manually Configure an IPv4 Internet Connection
Configure the IPv4 WAN Mode
By default, IPv4 is supported and functions in NAT mode but can also function in classical
routing mode. IPv4 functions the same way in IPv4-only mode that it does in IPv4 / IPv6
mode. The latter mode adds IPv6 functionality (see
page 53).
Network Address Translation
Network Address Translation (NAT) allows all computers on your LAN to share a single public
Internet IP address. From the Internet, there is only a single device (the VPN firewall) and a
single IP address. Computers on your LAN can use any private IP address range, and these
IP addresses are not visible from the Internet.
Note the following about NAT:
• The VPN firewall uses NAT to select the correct computer (on your LAN) to receive any
incoming data.
• If you have only a single public Internet IP address, you need to use NAT (the default
setting).
ProSAFE Gigabit Quad WAN SSL VPN Firewall SRX5308
Configure Advanced WAN Options and Other Tasks
IPv4 and IPv6 Internet and WAN Settings
on page 34
Configure the IPv6 Routing Mode
29
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