D-Link DMS-3130 User Manual - Page 359

DMS-3130 Series Multi-Gigabit L3 Stackable Managed Switch Web UI Reference Guide The fields that can be configured are described below: Parameter IPv4 TACACS Source Interface Name Description Enter the name of the source IPv4 TACACS+ interface here. Click the Apply button to accept the changes made. Click the Delete button to remove the specified entry. Click the Back button to return to the previous window. TACACS Statistic This window is used to view and clear the TACACS+ statistic information. To view the following window, click Security > TACACS > TACACS Statistic, as shown below: Figure 9-39 TACACS Statistic Window The fields that can be configured are described below: Parameter Group Server Name Description Select the TACACS+ group server name from this list here. Click the first Clear button to clear the information based on the group selected. Click the Clear All button to clear all the information in this table. Click the second Clear button to clear all the information for the specific entry. IMPB The IP network layer uses a four-byte address. The Ethernet link-layer uses a six-byte MAC address. Binding these two address types together allows the transmission of data between the layers. The primary purpose of IP-MAC-Port Binding (IMPB) is to restrict the access to a Switch to a number of authorized users. Authorized clients can access a Switch's port by either checking the pair of IP-MAC addresses with the pre-configured database or if DHCP snooping has been enabled in which case the Switch will automatically learn the IP/MAC pairs by snooping DHCP packets and saving them to the IMPB white list. If an unauthorized user tries to access an IP-MAC binding enabled port, the system will block the access by dropping its packet. Active and inactive entries use the same database. The function is port-based, meaning a user can enable or disable the function on the individual port. 348