Which actions can help secure a BIND server? (Select 3 correct answers)

Which actions can help secure a BIND server? (Select 3 correct answers)

• A. Run the BIND daemon as a non-root user
• B. Configure ACLs
• C. Require password authentication for clients
• D. Run the BIND daemon in a chroot jail

Answer: (A)

Running the BIND daemon as a non-root user is an essential security measure for several reasons. By executing the BIND service with reduced privileges, the potential impact of a security breach is minimised. If an attacker gains control over a process running as a non-root user, they will have limited access to the system compared to if the process was run with root privileges. This layer of defense mitigates risks associated with vulnerabilities within the BIND software, ensuring that even if an attack occurs, the potential for damage is significantly reduced. In addition to running the daemon as a non-root user, configuring Access Control Lists (ACLs) and requiring password authentication for clients also significantly bolster the security of a BIND server. ACLs help to restrict which IP addresses or subnet ranges can query or update the DNS server, further limiting exposure to external threats. Meanwhile, password authentication enhances security by ensuring that only authorized clients can make specific requests, preventing unauthorized access to sensitive DNS configurations. Running the service in a chroot jail provides a sandbox environment, isolating the BIND process and its resources from the rest of the system, which is another effective way to enhance security. Together, these measures create a robust defense strategy for securing a BIND server against various

Running the BIND daemon as a non-root user is an essential security measure for several reasons. By executing the BIND service with reduced privileges, the potential impact of a security breach is minimised. If an attacker gains control over a process running as a non-root user, they will have limited access to the system compared to if the process was run with root privileges. This layer of defense mitigates risks associated with vulnerabilities within the BIND software, ensuring that even if an attack occurs, the potential for damage is significantly reduced.

In addition to running the daemon as a non-root user, configuring Access Control Lists (ACLs) and requiring password authentication for clients also significantly bolster the security of a BIND server. ACLs help to restrict which IP addresses or subnet ranges can query or update the DNS server, further limiting exposure to external threats. Meanwhile, password authentication enhances security by ensuring that only authorized clients can make specific requests, preventing unauthorized access to sensitive DNS configurations. Running the service in a chroot jail provides a sandbox environment, isolating the BIND process and its resources from the rest of the system, which is another effective way to enhance security.

Together, these measures create a robust defense strategy for securing a BIND server against various