xStack
®
DES-3500 Series Layer 2 Stackable Fast Ethernet Managed Switch User Manual
198
Filter
DHCP Server Screening Setting
Due to this function allow you not only to restrict all DHCP Server packets but also to receive any specified DHCP server packet
by any specified DHCP client, it is useful when one or more than one DHCP servers are present on the network and both provide
DHCP services to different distinct groups of clients. Enabling the DHCP filter in the first time will create both an access profile
and access rule per port, then creat other access rules following. These rules are used to block all DHCP server packets. Similarly,
addition of a permit DHCP entry will create one access profile and create one access rule only in the first time where DHCP client
MAC address is the client MAC address, and the Source IP address is the same as the DHCP server’s IP address (UDP port
number 67) that set in the DHCP Client Screening Setting window. These rules are used to permit the DHCP server packets with
specific fileds, which the user configured.
To view this window, click Security Management > Filter > DHCP Server Screening Settings.
When DHCP Server filter function is enabled in DHCP Server Screening Setting window, all DHCP Server packets will be
filtered from a specific port.
Figure 7- 60. DHCP Server Screening Setting window
To Next Page
Loading...
Need help?
General