Web Management Guide-R01

Table Of Contents
Chapter 12
| Security Measures
IPv4 Source Guard
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Valid-Time – The amount of time that the specified IPv6 prefix is advertised as
being valid.
Expire – The time before this prefix entry will be removed.
VLAN – The VLAN associated with the prefix entry.
Interface – The port or trunk interface associated with the prefix entry.
Web Interface
To display the ND Snooping prefix list:
1. Click Security, ND Snooping.
2. Select Show Information from the Step list.
3. Click Prefix.
Figure 234: Displaying the Prefix List for ND Snooping
IPv4 Source Guard
IPv4 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 dynamic
entries in the DHCP Snooping table when enabled (see “DHCP Snooping” on
page 351). IP source guard can be used to prevent traffic attacks caused when a
host tries to use the IPv4 address of a neighbor to access the network. This section
describes how to configure IPv4 Source Guard.
Configuring Ports
for IPv4 Source Guard
Use the Security > IP Source Guard > General page to set the filtering type based on
source IP address, or source IP address and MAC address pairs. It also specifies
lookup within the ACL binding table or the MAC address binding table, as well as
the maximum number of allowed binding entries for the lookup tables.
IP Source Guard is used to filter traffic on an insecure port which receives messages
from outside the network or fire wall, and therefore may be subject to traffic attacks
caused by a host trying to use the IP address of a neighbor.