- Price £1,295.00
- Duration 3 day(s)
DescriptionThis 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.
Who will benefit?
Technical staff wanting to learn DNS including:
Prerequisites UNIX Fundamentals (or Windows knowledge).
Skills By the end of the training course delegates will be able to:
Describe the architecture of DNS.
Explain how DNS works.
Install, configure, maintain and troubleshoot DNS.
Course Content 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.
Ways to use DNS, dynamic and static configuration, multiple nameservers, domain name, searchlist, resolution issues, testing the configuration.
DNS server software
DNS implementations, Microsoft (NT to 2003), BIND 4.x, 8.x, 9.x, daemons and services, installation, starting and stopping servers.
DNS zone files
What is a zone, Zone file overview, Forward zones, Reverse zones, Resource records, A records, PTR records, CNAME records, MX records, SRV records. Root hints, local zone file. BIND and Microsoft configuration.
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.
DHCP, DDNS, IXFR, WINS integration.
Root servers, root server selection, Authority, delegation, NS records, subdomain with and without delegation, reverse delegation.
The DNS protocol
The DNS stack, DNS port numbers, DNS queries, The DNS header, header section format, question format, other section format.DNS securityRestricting queries, DNS and firewalls, Split DNS, forwarders, internal root servers, the use of proxy servers, DNSSEC, TSIG.
DNS and IPv6
What is IPv6, IPv6 addressing, IPv6 DNS issues, two approaches (RFC 1886, RFC 2874), IPv6 reverse delegation.
Problem solving, some basic tools, DNS troubleshooting, Zone file checking, Some common errors, Log files, tools, nslookup, dig, host, DNS design and performance, load balancing.
Useful books, Internet sites, RFCs.