Netgear XSM4324FS Software Administration Manual Software Version 12.x - Page 386
IPv6 Stateless RA Guard
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M4300 Series and M4300-96X Fully Managed Switches 7. Disconnect the user from the DAC. [root@localhost raddb]# cat /usr/local/etc/raddb/test.txt | radclient -x 172.26.2.145:3799 disconnect 12345678 IPv6 Stateless RA Guard Spoof attacks can occur on routed protocols. When you operate an IPv6 network in a shared Layer 2 network segment, the network can receive and process rogue router advertisement (RA) messages that are generated with malicious intent or are caused by an incorrect configuration of routers that are connected to the segment. If the IPv6 network segments are part of one or more managed switches and all traffic between the IPv6 end devices traverses through the managed switches, the IPv6 RA Guard feature can provide protection against rogue RA messages. The IPv6 RA Guard feature lets you block or reject rogue RA messages that are received on a port. The IPv6 RA Guard feature analyzes the RA messages and compares the configuration on the switch with the information in the RA message. If the frame is validated, the RA message is forwarded to the unicast or multicast destination. If the RA message is not validated, the RA message is dropped by the switch. The IPv6 RA Guard feature can operate in the following two modes: • Stateless. The switch does not maintain any state and simply validates the RA messages as they are received against the configured match criteria. • Stateful. The switch dynamically learns about valid RA senders and stores this information to allow subsequent RA messages. The switch listens to the RA messages that are received over a short period that you can configure manually. The switch then allows RA messages that are received only on the ports on which valid RA messages were received during the listening period. Note: On a managed switch, the IPv6 RA Guard feature supports only the stateless mode. To configure the IPv6 RA Guard feature, display the configuration, and display the dropped messages: 1. Configure the IPv6 RA Guard feature on port 1. (Netgear Switch) (Config)#interface 1/0/1 (Netgear Switch) (Interface 1/0/1)#ipv6 nd raguard attach-policy (Netgear Switch) (Interface 1/0/1)#exit (Netgear Switch) (Config)#exit Security Management 386 Software Administration Manual
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