D-Link DSL-1500G++ User Manual page 59

Traffic will be allowed or blocked depending on the validator configuration specified when
the policy was created. See Configuring Firewall policies Section. This section assumes
that you have previously followed the instructions in Configuring Firewall policies Section.
To configure a validator:
1. From the Current Firewall Policies table, click on the Host Validators link for the policy
that you want to configure. The Configure Validators page is displayed. Click on the Add
Host Validator link. The following page is displayed:
2. In the Host IP Address text box, type the IP address that you want to allow/block.
3. In the Host Subnet Mask text box, type the IP mask address. If you want to filter a range
of addresses, you can specify the mask, for example, 255.255.255.0. If you want to filter
a single IP address, use the specific IP mask address, for example, 255.255.255.255.
4. Click on the Direction drop-down list and select the direction of traffic that you want the
validator to filter.
5. Click on . The Configure Validators page is displayed, containing details of the
host validator that you have just added.
6. Each portfilter displayed in the Configure Validators page has a Delete Host Validator
hyperlink assigned to it. To delete a validator, click on this link, then at the confirmation
page, click on the Delete Host Validator button. The validator is removed from the
Firewall configuration.
Configuring triggers
A trigger allows an application to open a secondary port in order to transport packets. The
most common applications that require secondary ports are FTP and NetMeeting. This
section assumes that you have followed the instructions in Enabling Security Section.
To configure a trigger:
1. Go to the Policies, Triggers and Intrusion Detection section of the Security Interface
Configuration. Click on Trigger Configuration. The Firewall Trigger Configuration page is
displayed. There are no triggers defined at this time. Click on the New Trigger link. The
following page is displayed:
DSL-1500G++ User Manual
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