Application Layer Gateway And Port Forwarding; Dmz Hosting; Firewall - ActionTec GT724-WG User Manual

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Note: Before Remote Management can be activated, the administrator password must be
set. To do this, go to the Setup screen and select Change Admin Password. Follow the
instructions in the subsequent screens.
47 Chapter 4 Using Advanced Setup

Application Layer Gateway and Port Forwarding

Selecting Application Layer Gateway in the "Configuring the Advanced Settings" screen generates the
"Application-Level Gateway (
to bypass the Gateway's built-in firewall, allowing access to parts of the network (for hosting a Web or ftp
server, for example). To use, select the host name of a computer on the network from the "
drop-down list (click the down arrow), then click Add. Next, select a "Category" by clicking the
appropriate radio button. In the "Available Rules" list box, select a game, application, server, etc., then
click Add>>. The selected item appears in the "Applied Rules" list box. Repeat for each item neededTo
remove an item from the Applied Rules list, highlight it, then click Remove.To view an item's rules
(forwarded ports, etc.), highlight it, then click View Rule.
To create a custom set of rules, click the "User" radio button, then click New. The "Rule Management"
screen appears.
48 Actiontec 54 Mbps Wireless DSL Gateway User Manual
In this screen, the user can create a custom set of rules for a game or application not listed in the
Application Level Gateway screen. Enter the "Rule Name," "Protocol," "Port Start," "Port End," and "Port
Map" in the appropriate text boxes, then click Apply. The rules are summarized at the bottom of the screen,
and the rule set will appear in the Application Level Gateway screen after clicking Back.

DMZ Hosting

Selecting Hosting in the "Configuring the Advanced Settings" screen generates the "
DMZ
screen. To use hosting, enter the
DMZ
in the " Host Address" text box, then click On.
DMZ IP
hosting is used to support online gaming and Internet conferencing services. These programs usually
DMZ
require multiple open ports, making the network accessible from the Internet.
places the host computer outside of the Gateway's network. Actiontec recommends activating
DMZ
hosting only as long as necessary.
M
Warning: The
Internet while in
49 Chapter 4 Using Advanced Setup

Firewall

Selecting Firewall in the "Configuring the Advanced Settings" screen generates the "Firewall Security
Level" screen. Select the level of security needed for the network.
High
If High is selected in the "Firewall Security Level" screen, the services listed at the bottom of the screen
( , , ,
HTTP FTP POP3 SMTP
ones allowed to pass through the firewall. All other services will be blocked.
50 Actiontec 54 Mbps Wireless DSL Gateway User Manual
) and Port Forwarding" screen. Port forwarding allows certain programs
ALG
address of the computer on the network to be used as a
IP
Host computer will be vulnerable to computer hackers on the
DMZ
mode.
DMZ
, , v , ,
IMAP IMAP 3 DNS IPSEC IKE
DMZ
, , , and
IPSEC ESP HTTPS
Device"
LAN
Hosting"
DMZ
host
DMZ
hosting symbolically
DMZ
) are the only
NNTP
18