Accton Technology ES3528M-SFP manual IP Source Guard Port Configuration

IP Source Guard 3

IP Source Guard

IP Source Guard is a security feature that filters IP traffic on network interfaces based on manually configured entries in the IP Source Guard table, or static and dynamic entries in the DHCP Snooping table when enabled (see “DHCP Snooping” on page 3-232). IP source guard can be used to prevent traffic attacks caused when a host tries to use the IP address of a neighbor to access the network. This section describes commands used to configure IP Source Guard.

IP Source Guard Port Configuration

IP Source Guard is used to filter traffic on an unsecure port which receives messages from outside the network or firewall, and therefore may be subject to traffic attacks caused by a host trying to use the IP address of a neighbor.

When enabled, traffic is filtered based upon dynamic entries learned via DHCP snooping or static addresses configured in the source guard binding table. An inbound packet’s IP address (sip option) or both its IP address and corresponding MAC address (sip-mac option) are checked against the binding table. If no matching entry is found, the packet is dropped.

Command Attributes

•Filter Type – Configures the switch to filter inbound traffic based source IP address, or source IP address and corresponding MAC address. (Default: None)

•None – Disables IP source guard filtering on the port.

•SIP – Enables traffic filtering based on IP addresses stored in the binding table.

•SIP-MAC– Enables traffic filtering based on IP addresses and corresponding MAC addresses stored in the binding table.

Web – Click IP Source Guard, Port Configuration.

Figure 3-149 IP Source Guard Port Configuration

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