Lynis Security Controls

NETW-2704 - Nameserver configuration


Nameservers, or DNS servers, are being used to do host resolving. They resolve a hostname like into an IP address like If one or more nameservers are not working as expected, it might influence the performance of the system and result in other unexpected issues.



How to solve

Add additional DNS servers to the resolving configuration, which is usually /etc/resolv.conf, or part of the networking scripts. See this file if the configuration or the networking script is the original source to be changed.

Perform daily health checks of your environment, learn in-depth system hardening, and protect your systems better.

Upgrade to Lynis Enterprise

Linux and Unix System Hardening

This information is provided as part of the Lynis community project. It is related to Lynis control NETW-2704. All information should be considered as-is, without guarantees. Any advice or snippets should be tested before implementing in production environments.


Lynis is a technical security audit tool for Unix flavors like Linux, macOS, AIX, Solaris, and *BSD. It is open source software and free to use. The project has an active community, including open development via GitHub.

Lynis Enterprise

Need more advanced features, like vulnerability scanning, or reporting installed software packages? Lynis Enterprise will collect more data and present it with an easy to use web interface.

Gain additional benefits: automating security audits, reporting, and the implementation of related security measures.

Lynis Enterprise includes
  • Centralized management
  • Prioritized plans
  • Reporting
  • Dashboards
  • Integration (API)
  • Improvement snippets for tools like Ansible, Chef, Cfengine, Puppet, and SaltStack

Take the Tour