Specifications

IPv4 and IPv6 Internet and WAN Settings

ProSAFE Gigabit Quad WAN SSL VPN Firewall SRX5308

Figure 25.

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 W

AN 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 do 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

domain, and restores DNS requests for the resulting fully qualified domain name (FQDN) to

your frequently changing IP address.