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Configuring Your Gateway
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SMCD3GN2 Wireless Cable Modem User Manual
Figure 40. Customer Defined Service Menu
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SMCD3GN2 Wireless Cable Modem User Manual
Table 17. Customer Defined Service Page Options
Option
Description
Name
Name for identifying the custom service. The name is for reference purposes only.
Type
The type of protocol. Choices are TCP, UDP, and TCP/UDP. Default is TCP.
LAN Server IP
IP address of the LAN PC or server that is running the service.
Remote IPs
Forwards the service to any remote IP address, one remote IP address, or a range of remote IP
addresses.
If you select one remote IP address, enter the IP address in the
Start IP
field.
If you select a range of remote IP addresses, enter the starting IP address in the
Start IP
field and the
ending IP address in the
End IP
field.
Start IP
To specify:
A single remote IP address, enter the remote IP address.
A range of remote IP addresses, enter the starting IP address here and the ending IP address range in
the next field.
This field is unavailable if the Gateway is configured for any remote IP addresses.
End IP
Ending IP address in the remote IP address range. This field is unavailable if the Gateway is configured for
any remote IP addresses or a single remote IP address.
Public IP Ports
A single public IP port or a range of public IP ports on which the service is provided. If necessary, contact
the application vendor for this information.
If you select a single public port, enter the port number in the
Start Public Port
field.
If you select a range of public ports, enter the starting port number in the
Start Public Port
field and the
ending port number in the End Public Port field.
Start Public Port
Starting number of the port on which the service is provided.
End Public Port
Ending number of the port on which the service is provided. This field is unavailable if the Gateway is
configured for a single public IP port.
Private Ports
Numbers of the ports whose traffic the Gateway forwards to the LAN. If there is a range of ports, enter the
starting private port here and check
Enable Port Range
. The Gateway automatically calculates the end
private port. The LAN PC server listens for traffic/data on this port (or these ports).
Page 73 / 112
Configuring Your Gateway
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SMCD3GN2 Wireless Cable Modem User Manual
Security Settings (Firewall) Menu
The Security Settings (Firewall) menu lets you enable or disable the Gateway’s firewall.
If you enable the Gateway firewall module, the following submenus appear in the menu bar:
y
Configure access control settings
see page 74
y
Configure the Gateway for special applications
see page 76
y
Set up URL blocking
see page 90
y
Schedule rules
see page 92
y
Receive email or syslog alert notifications
see page 93
y
Configure a local client computer as a local DMZ for unrestricted two-way Internet
access
see page 97
Enabling or Disabling Firewall
The Security Settings (Firewall) menu provides an option for enabling or disabling the
Gateway’s firewall setting. To access the Security Settings (Firewall) menu, click
Firewall
in
the menu bar. Figure 41 shows an example of the menu.
By default, the Gateway’s firewall settings are enabled. To disable the firewall, uncheck
Enable Firewall Module
and click
Apply
. Disabling the firewall hides the submenus below
the
Firewall
menu.
Figure 41. Security Settings (Firewall) Menu
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Configuring Your Gateway
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SMCD3GN2 Wireless Cable Modem User Manual
Configuring Access Control
The Access Control menu lets you enable access control to block traffic at the Gateway's
LAN interfaces from accessing the Internet.
To access the Access Control menu, click
Firewall
in the menu bar and then click the
Access Control
submenu in the menu bar.
Note:
The
Access Control
submenu is not available in the menu bar if
Enable Firewall
Module
is disabled in the Security Settings (Firewall) menu (see page 73).
By default, the Gateway does not block attempts to access the LAN from the Internet. To
enable access control, check
Enable Access Control
if it is unchecked and click
Apply
.
When Access Control is enabled, you can configure up to 35 predefined and customer-
defined filtering tables.
Page 75 / 112
Configuring Your Gateway
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SMCD3GN2 Wireless Cable Modem User Manual
Figure 42. Access Control Menu

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