Cpu Interface Filtering; Cpu Interface Filtering State Settings; Cpu Interface Filtering Profile Table - D-Link xStack DGS-3600 User Manual

xStack DGS-3600 Series Layer 3 Gigabit Ethernet Managed Switch

CPU Interface Filtering

Due to a chipset limitation and the need for extra switch security, the xStack DGS-3600 switch series incorporates CPU Interface
filtering. This added feature increases the running security of the Switch by enabling the user to create a list of access rules for
packets destined for the Switch's CPU interface. Employed similarly to the Access Profile feature previously mentioned, CPU
interface filtering examines Ethernet, IP and Packet Content Mask packet headers destined for the CPU and will either forward
them or filter them, based on the user's implementation. As an added feature for the CPU Filtering, the Switch allows the CPU
filtering mechanism to be enabled or disabled globally, permitting the user to create various lists of rules without immediately
enabling them.
Creating an access profile for the CPU is divided into two basic parts. The first is to specify which part or parts of a frame the
Switch will examine, such as the MAC source address or the IP destination address. The second part is entering the criteria the
Switch will use to determine what to do with the frame. The entire process is described below.

CPU Interface Filtering State Settings

In the following window, the user may globally enable or disable the CPU Interface Filtering mechanism by using the pull-down
menu to change the running state. To access this window, click ACL > CPU Interface Filtering > CPU Interface Filtering
State. Choose Enabled to enable CPU packets to be scrutinized by the Switch and Disabled to disallow this scrutiny.
Figure 10- 16. CPU Interface Filtering State Settings window

CPU Interface Filtering Profile Table

Click ACL > CPU Interface Filtering > CPU Interface Filtering Table to display the CPU Access Profile Table entries created
on the Switch. To view the configurations for an entry, click the hyperlinked Profile ID number.
Figure 10- 17. CPU Interface Filtering Table
To add an entry to the CPU Interface Filtering Profile Table, click the Add Profile button. This will open the CPU Interface
Filtering Profile Configuration page, as shown below. There are three CPU Access Profile Configuration pages; one for
Ethernet (or MAC address-based) profile configuration, one for IP address-based profile configuration and one for the Packet
Content Mask. Users can switch between the three CPU Access Profile Configuration pages by using the Type drop-down
menu. The page shown below is the Ethernet CPU Interface Filtering Configuration page.
189