The below resolution is for customers using SonicOS 7.X firmware. This release includes significant user interface changes and many new features that are different from the SonicOS 6.5 and earlier firmware. This would serve two purposes, blocking unauthorized access, and allow only listed Mac addresses in the network. This article explains the use of Static ARP (Address Resolution Protocol) by Binding an IP to a MAC address and ensuring only IP's with static ARP entries are allowed on the network and rest will be blocked. DHCP relay-based leases (SonicWall's - IP Helper).DHCP Server-based leases (SonicWall's - DHCP Server).The MAC-IP Anti-Spoof cache is built through one or more of the following sub-systems: If they are found, the packet is allowed through. An incoming packet's source MAC and IP addresses are looked up in this cache. The MAC-IP Anti-Spoof cache validates incoming packets and determines whether they are to be allowed inside the network. The MAC-IP Anti-Spoof feature lowers the risk of these attacks by providing administrators different ways to control access to a network, and by eliminating spoofing attacks at OSI Layer 2/3.
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This article explains how to restrict traffic initiated from internal network, based on MAC addresses, using MAC-IP Anti-spoof protection.
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