Owner's Manual

Security
78
N750 Wireless Dual Band Gigabit ADSL Modem Router DGND4000
The Firewall Rules screen lists all firewall rules that have been changed from their default
settings. The default rules allow all outgoing traffic and block all incoming traffic.
• T
o change the firewall rules for outbound traffic, you need to edit them from the
Outbound Services screen as described in Step 2.
• T
o change the firewall rules for inbound traffic, you need to edit them from the Port
Forwarding/Port Triggering screen as described in Port Forwarding and Triggering on
page 109.
The Outbound Services and Inbound Services screens
list the available services you can
allow or block. You can also define your own custom services to allow or block with the
Add Service screen as described in Add Custom Services to Allow or Block on p
age 79.
Once you add your own custom services, they are available
on the Outbound Services
and Inbound Services screens.
You can also specify whether these services are a
lways allowed or blocked, or allowed or
blocked per schedule as described in Schedule for Firewall Rules on
page 81.
2. Outbound
Services. To allow or block an outbound service, click Add.
Use the Outbound Services screen to define a new outbound firewall rule, or edit an
existing rule. The outbound firewall rules are used to block or allow access by computers
on your network to services or applications on the Internet.
a. Service. Se
lect the service or application to be covered by this rule. If the service or
application you want does not appear in the list, you have to define it as described in
Add Custom Services to Allow or Block on
page 79.
b. Action. Select the
action you want for traffic covered by this rule:
• BLOCK always.
Always block the traffic covered by this rule.