Cisco SPA112 Administration Guide - Page 33

DMZ (SPA122 Only), Network Setup, Application > DMZ, Submit, Cancel, Enabled, Disabled

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Configuring the Network Application Settings (SPA122 Only) 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 Status Private IP Description Click Enabled to enable this feature, or click Disabled to disable it. The default setting is Enabled. Specify the local IP address of the device that can be accessed through the DMZ. Cisco SPA100 Series Phone Adapters Administration Guide 33

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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.