What mitigation technique can prevent rogue servers from giving false IPv6 configuration parameters?

What mitigation technique can prevent rogue servers from giving false IPv6 configuration parameters?

• A. Disabling IPv6 on clients
• B. Implementing DHCPv6 guard
• C. Using a firewall to block multicast traffic
• D. Applying a network address translation workarounds

Answer: (B)

Implementing DHCPv6 guard is an effective mitigation technique to prevent rogue servers from providing false IPv6 configuration parameters. DHCPv6 guard functions by allowing only authorized DHCPv6 servers to respond to configuration requests on the network. When enabled, it inspects DHCPv6 messages on the network, and if it detects any unauthorized or rogue responses, it drops those packets, thus ensuring that devices only receive the correct configuration information from trusted sources. This mechanism is essential in maintaining network integrity and ensuring that clients receive valid IPv6 configurations, preventing attackers from hijacking or manipulating network settings. By controlling the DHCPv6 traffic, the network can significantly reduce the risk of configuration-related attacks, such as man-in-the-middle attacks or address spoofing, which rely on rogue servers to provide false information to clients. The other options mentioned do not offer the same level of targeted protection against rogue DHCPv6 servers. Disabling IPv6 on clients may eliminate exposure to rogue servers but at the cost of losing IPv6 functionality. Using a firewall to block multicast traffic does not specifically address the problem of rogue DHCPv6 servers, as legitimate DHCPv6 communications often rely on multicast. Network address translation (NAT) workarounds might help in some scenarios but would

Implementing DHCPv6 guard is an effective mitigation technique to prevent rogue servers from providing false IPv6 configuration parameters. DHCPv6 guard functions by allowing only authorized DHCPv6 servers to respond to configuration requests on the network. When enabled, it inspects DHCPv6 messages on the network, and if it detects any unauthorized or rogue responses, it drops those packets, thus ensuring that devices only receive the correct configuration information from trusted sources.

This mechanism is essential in maintaining network integrity and ensuring that clients receive valid IPv6 configurations, preventing attackers from hijacking or manipulating network settings. By controlling the DHCPv6 traffic, the network can significantly reduce the risk of configuration-related attacks, such as man-in-the-middle attacks or address spoofing, which rely on rogue servers to provide false information to clients.

The other options mentioned do not offer the same level of targeted protection against rogue DHCPv6 servers. Disabling IPv6 on clients may eliminate exposure to rogue servers but at the cost of losing IPv6 functionality. Using a firewall to block multicast traffic does not specifically address the problem of rogue DHCPv6 servers, as legitimate DHCPv6 communications often rely on multicast. Network address translation (NAT) workarounds might help in some scenarios but would