Interlogix NS3500-28T-4S User Manual - Manual (Page 276)

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4.9.9.1 Port Settings
IP Source Guard is a secure feature used to restrict IP traffic on DHCP snooping untrusted ports by filtering traffic
based on the DHCP Snooping Table or manually configured IP Source Bindings. It helps prevent IP spoofing attacks
when a host tries to spoof and use the IP address of another host.
The IP Source Guard Port Setting and Information screens in Figure 4-9-60 & Figure 4-9-61 appear.
Figure 4-9-60 IP Source Guard Port Setting Page Screenshot