IPv4 and IPv6 Internet and WAN Settings
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ProSafe Gigabit Quad WAN SSL VPN Firewall SRX5308
Figure 24.
The List of Secondary WAN addresses table displays the secondary LAN IP addresses
added for the selected WAN interface.
4. In the Add WAN Secondary Addresses section of the screen, enter the following settings:
• IP Address. Enter the secondary address that you want to assign to the WAN port.
• Subnet Mask. Enter the subnet mask for the secondary IP address.
5. Click the Add table button in the rightmost column to add the secondary IP address to the
List of Secondary WAN addresses table.
6. (Optional) Repeat Step 4 and Step 5 for each secondary IP address that you want to add to
the List of Secondary WAN addresses table.
To delete one or more secondary addresses:
1. In the List of Secondary WAN addresses table, select the check box to the left of the
address that you want to delete, or click the Select All table button to select all
addresses.
2. Click the Delete table button.
Configure Dynamic DNS
Dynamic DNS (DDNS) is an Internet service that allows devices with varying public IPv4
addresses to be located using Internet domain names. To use DDNS, you need to set up an
account with a DDNS provider such as DynDNS.org, TZO.com, Oray.net, or 3322.org. (Links
to DynDNS, TZO, Oray, and 3322 are provided for your convenience as option arrows on the
DDNS configuration screens.) The VPN firewall firmware includes software that notifies
DDNS servers of changes in the WAN IP address so that the services running on this
network can be accessed by others on the Internet.
If your network has a permanently assigned IP address, you can register a domain name and
have that name linked with your IP address by public Domain Name Servers (DNS).
However, if your Internet account uses a dynamically assigned IP address, you will not know
in advance what your IP address will be, and the address can change frequently—hence, the
need for a commercial DDNS service, which allows you to register an extension to its