Zhone 1752 shdsl ユーザーズマニュアル

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 a mask (for example, 255.255.255.0). If you want to filter a single 
IP address, use the specific IP address mask (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 port filter 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. 

A trigger allows an application to open a secondary port in order to transport packets. Two 
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, at first with no triggers defined. Click on the New Trigger link. The following page is 
displayed: 

 

2. Configure the trigger as follows: 

60                                                                              June 2005                                                              1752-A2-GB20-00