Netgear GS418TPP User Manual - Page 103

ProSAFE 8-Port or 16-Port Gigabit Smart Managed Switch Model GS418TPP, GS510TLP, and GS510TPP The following table describes the nonconfigurable data that is displayed. Field Description Interface The interface from which the DHCP message is received. Untrusted Server Messages With Opt82 The number of DHCP message with option82 received from an untrusted server. Untrusted Client Messages With Opt82 The number of DHCP message with option82 received from an untrusted client. Trusted Server Messages The number of DHCP message without option82 received from a trusted server. Without Opt82 Trusted Client Messages The number of DHCP message without option82 received from a trusted client. Without Opt82 6. Click the Update button to refresh the page with the latest information about the switch. 7. Click the Clear button to reset the statistics. DHCP Snooping DHCP snooping is a useful feature that provides security by filtering untrusted DHCP messages and by building and maintaining a DHCP snooping binding table. An untrusted message is a message that is received from outside the network or firewall and that can cause traffic attacks within your network. The DHCP snooping binding table contains the MAC address, IP address, lease time, binding type, VLAN number, and interface information that corresponds to the local untrusted interfaces of a switch. An untrusted interface is an interface that is configured to receive messages from outside the network or firewall. A trusted interface is an interface that is configured to receive only messages from within the network. DHCP snooping acts like a firewall between untrusted hosts and DHCP servers. It also provides way to differentiate between untrusted interfaces connected to the end user and trusted interfaces connected to the DHCP server or another switch. Configure the Global DHCP Snooping Settings You can view and configure the global settings for DHCP snooping.  To configure the global DHCP snooping settings: 1. Connect your computer to the same network as the switch. You can use a WiFi or wired connection to connect your computer to the network, or connect directly to a switch that is off-network using an Ethernet cable. 2. Launch a web browser. 3. In the address field of your web browser, enter the IP address of the switch. If you do not know the IP address of the switch, see Change the Default IP Address of the Switch on page 11. Configure System Information 103