DNS Linux Engineer Jobs
DNS is fundamental infrastructure in every Linux environment, from enterprise on-premise deployments running BIND or PowerDNS to cloud-native Kubernetes clusters relying on CoreDNS for service discovery. Linux DNS engineers design and operate authoritative and recursive name servers, manage DNS security with DNSSEC, and troubleshoot resolution issues across complex hybrid network environments.
Frequently Asked Questions
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BIND (Berkeley Internet Name Domain) is the most widely deployed authoritative DNS server on Linux and has been the internet standard for decades. PowerDNS is popular in service provider and API-driven environments. Unbound is a high-performance recursive resolver. In Kubernetes, CoreDNS is the default DNS server for cluster service discovery, replacing kube-dns.
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Kubernetes runs CoreDNS as a deployment in the kube-system namespace, providing DNS-based service discovery for pods and services. Each pod is configured to use the cluster DNS resolver. CoreDNS is configured through a Corefile and supports plugins for caching, rewriting, forwarding, and custom zone hosting. DNS troubleshooting is a common SRE and platform engineering skill.
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DNSSEC (DNS Security Extensions) adds cryptographic signatures to DNS records, protecting against cache poisoning and spoofing attacks. It is required for government and regulated industry deployments and increasingly expected in security-conscious organisations. Linux DNS engineers working with BIND or PowerDNS need to understand key signing, zone signing, and trust anchor management.
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DNS engineering roles typically require broader Linux networking skills including DHCP administration, BGP and OSPF routing protocol knowledge, firewall rule management, and familiarity with network monitoring tools. In cloud environments, understanding Route 53 (AWS), Cloud DNS (GCP), and Azure DNS alongside on-premise DNS integration is expected.