System information

Configuring the Network
Application Settings (SPA122 Only)
Cisco SPA100 Series Phone Adapters Administration Guide 33
3
DMZ (SPA122 Only)
Use the Network Setup > Application > DMZ page if you need to allow a local
device to be exposed to the Internet for a special-purpose service.
The specified network device must have its DHCP client function disabled and
must have a static IP address to it to ensure that it is reachable at the specified IP
address. To reserve an IP address for a device, see Network Settings for the
LAN and DHCP Server (SPA122 Only), page 20.
NOTE A Demilitarized Zone (DMZ) is similar to Port Range Forwarding; both features allow
Internet traffic to access a resource on your private network. However, Port Range
Forwarding is more secure because it only opens the ports that you specify for an
application. DMZ hosting opens all the ports of one device, exposing it to the
Internet.
To open this page: Click Network Setup on the menu bar, and then click
Application > DMZ in the navigation tree.
Enter the settings as described below. After making changes, click Submit to save
your settings, or click Cancel to abandon any unsaved entries.
Field Description
Status Click Enabled to enable this feature, or click Disabled to
disable it. The default setting is Enabled.
Private IP Specify the local IP address of the device that can be
accessed through the DMZ.