What should you create to prevent spoofing of the internal network?

The correct answer is B. An ACL. ACLs can prevent spoofing by dropping traffic from external sources that claim to have an internal source address. Configuring ACLs on the perimeter firewall or router is a common countermeasure for IP spoofing.

Network Security Concepts

Question

Options

AA NAT rule
BAn ACL
CA record in the host file
DA DNS record

How the community answered

(42 responses)

A
2% (1)
B
90% (38)
C
5% (2)
D
2% (1)

Explanation

ACLs can prevent spoofing by dropping traffic from external sources that claim to have an internal source address. Configuring ACLs on the perimeter firewall or router is a common countermeasure for IP spoofing.

Topics

#IP spoofing#ACL#anti-spoofing#network access control

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