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Definitive DNS for engineers

A 3 day
training course
**Due to the current COVID-19 isolation rules all our courses are being delivered via virtual instructor led learning until further notice**

DNS training course description

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.

Key outcomes from this course

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

DNS training course details

Who will benefit:
Technical staff wanting to learn DNS including:
Network personnel
System administrators.
UNIX Fundamentals (or Windows knowledge).
TCP/IP foundation for engineers.
3 days

Training approach

This structured training course seeks to build upon workbook learning through the use of group exercises, dynamic discussion and individual tasks in order to deliver an engaging and interactive module that will ensure all candidates are able to transfer their new skills into the workplace.

Overall ratings for this course:

Course review

"Able to customise course which was excellent. "
M. H. Bovis Homes
"Material was interchanged well with live demo. "
M. T. Ernst & Young

DNS training course contents

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.

DNS 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.

Why Choose Us

SNT trainers score an average of over 90% on the three main areas of:
  • Ability to teach
  • Technical knowledge
  • Answering questions
“Excellently presented by a very knowledgeable and enthusiastic trainer.” P.D. General Dynamics

We limit our maximum class size to 8 delegates; often we have less than this. This ensures optimal interactivity between delegates and instructor.
"Excellent course. The small class size was a great benefit…" M.B. IBM

We write our own courses; courseware does not just consist of slides and our slides are diagrams not bullet point text. A typical chapter provides clearly defined objectives with a chapter overview, slides with text underneath, a quiz at the end to check the learning of the students. Hands on exercises are at the end and are used to reinforce the theory.

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