Overview
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.
Prerequisites
TCP/IP foundation for engineers
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
Outline
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.
Subdomains
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.
Summary
Useful books, Internet sites, RFCs.
Appendix: ENUM
What is ENUM, How ENUM works, NAPTR.
Frequently asked questions
How can I create an account on myQA.com?
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Find more answers to frequently asked questions in our FAQs: Bookings & Cancellations page.
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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?
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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.