This three-day hands on DNS training course studies both the UNIX BIND and the Microsoft (MS DNS) implementations. The course starts with the big picture of how DNS works, then client configuration. Primary and secondary servers are then configured, progressing to DDNS, subdomains and security issues. Hands on sessions follow all sections ensuring that troubleshooting techniques are used throughout the course. Students choose whether to use Windows or UNIX for the hands on sessions.

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TCP/IP foundation for engineers

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Delegates will learn how to

By the end of the course delegates will be able to:

  • Describe the architecture of DNS.
  • Explain how DNS works.
  • Install, configure, maintain and troubleshoot DNS
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What is DNS?

Hostnames, Name resolution, host files, host file problems, What is DNS? The DNS namespace, TLDs, gTLDs, registering domains, Nameservers, how DNS works.

Hands on Testing DNS servers on the Internet.

DNS clients

Ways to use DNS, dynamic and static configuration, multiple nameservers, domain name, searchlist, resolution issues, testing the configuration.

Hands on Client configuration.

DNS server software

Implementations, Microsoft, BIND, daemons and services, installation, starting and stopping servers.

Hands on Setting up a DNS server.

DNS zone files

What is a zone, Zone file overview, Forward zones, Reverse zones, Resource records, A records, PTR, CNAME, Root hints, local zone file. BIND and Microsoft configuration.

Hands on Server configuration files.

NS and applications

MX records, Mail server load balancing, SPF, SRV records, VoIP and SRV, Microsoft and SRV, NAPTR.

Hands on Testing records with dig and nslookup.

DNS slaves and other servers

DNS server types, Server resilience, Slaves, Zone transfers, SOA records, Serial numbers, recommendations, polling based zone transfers, NOTIFY, AD integration, DNS caching, Negative caching, TTL, Caching only servers.

Hands on Masters, slaves and zone transfers.

The DNS protocol

The DNS stack, DNS port numbers, DNS queries, The DNS header, header section format, question format, other section format.

Hands on Troubleshooting DNS with Wireshark.

Dynamic DNS

DHCP, DDNS, IXFR, WINS integration.

Hands on Dynamic DNS.


Root servers, root server selection, Authority, delegation, NS records, subdomain with and without delegation, reverse delegation.

Hands on Delegation, setting up a subdomain server.

DNS security

Restricting queries, DNS and firewalls, Split DNS, forwarders, internal root servers, the use of proxy servers, DNSSEC, TSIG.

Hands on Hardening a DNS server.

DNS and IPv6

What is IPv6, IPv6 addressing, IPv6 DNS issues, AAAA, IPv6 reverse delegation.

Troubleshooting DNS

Problem solving, DNS troubleshooting, Zone file checking, Some common errors, Log files, tools, nslookup, dig, host, DNS design, performance, load balancing.

Hands on Putting it all together.


Useful books, Internet sites, RFCs.

Appendix: ENUM

What is ENUM, How ENUM works, NAPTR.

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Why choose QA

Dates & Locations

Need to know

Frequently asked questions

How can I create an account on myQA.com?

There are a number of ways to create an account. If you are a self-funder, simply select the "Create account" option on the login page.

If you have been booked onto a course by your company, you will receive a confirmation email. From this email, select "Sign into myQA" and you will be taken to the "Create account" page. Complete all of the details and select "Create account".

If you have the booking number you can also go here and select the "I have a booking number" option. Enter the booking reference and your surname. If the details match, you will be taken to the "Create account" page from where you can enter your details and confirm your account.

Find more answers to frequently asked questions in our FAQs: Bookings & Cancellations page.

How do QA’s virtual classroom courses work?

Our virtual classroom courses allow you to access award-winning classroom training, without leaving your home or office. Our learning professionals are specially trained on how to interact with remote attendees and our remote labs ensure all participants can take part in hands-on exercises wherever they are.

We use the WebEx video conferencing platform by Cisco. Before you book, check that you meet the WebEx system requirements and run a test meeting (more details in the link below) to ensure the software is compatible with your firewall settings. If it doesn’t work, try adjusting your settings or contact your IT department about permitting the website.

How do QA’s online courses work?

QA online courses, also commonly known as distance learning courses or elearning courses, take the form of interactive software designed for individual learning, but you will also have access to full support from our subject-matter experts for the duration of your course. When you book a QA online learning course you will receive immediate access to it through our e-learning platform and you can start to learn straight away, from any compatible device. Access to the online learning platform is valid for one year from the booking date.

All courses are built around case studies and presented in an engaging format, which includes storytelling elements, video, audio and humour. Every case study is supported by sample documents and a collection of Knowledge Nuggets that provide more in-depth detail on the wider processes.

When will I receive my joining instructions?

Joining instructions for QA courses are sent two weeks prior to the course start date, or immediately if the booking is confirmed within this timeframe. For course bookings made via QA but delivered by a third-party supplier, joining instructions are sent to attendees prior to the training course, but timescales vary depending on each supplier’s terms. Read more FAQs.

When will I receive my certificate?

Certificates of Achievement are issued at the end the course, either as a hard copy or via email. Read more here.

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