What action regarding private IP addresses should you take?

• A. Publicize private IP addresses for coordination
• B. Share private IP addresses with vendors under NDA
• C. Publish private IP addresses in external docs
• D. Do not disclose private IP addresses and routing information to unauthorized parties

Answer: (D)

Keeping internal network details private helps prevent attackers from learning the layout of your environment. Private IP addresses and their routing information reveal which hosts exist and how traffic moves inside the network, creating a valuable map for someone attempting to breach systems or pivot between hosts. Therefore, the safest approach is to avoid disclosing private IP addresses and routing data to anyone who isn’t authorized. This reduces the attack surface and aligns with standard security practice of limiting sensitive information to need-to-know personnel and secure channels.

Exposing these details publicly, sharing them with vendors under an NDA, or publishing them in external documents would unnecessarily reveal internal structure, making it easier for someone to plan targeted attacks or misuse the information.