DNS – Domain Name Server

Course overview

This is a complete training course that deals with the DNS system and all its constituent parts. The training is aimed at system administrators or people with similar needs. It provides practical and theoretical knowledge of DNS and the BIND software.

During the course, a Linux-based operating system is used for the various laboratory exercises. Participants learn how to set up and configure BIND to provide functionality that is covered theoretically in the different chapters, such as delegation, redundancy and multiple views, etc.

Course Objective

The basic theory behind the domain name system, DNS.
The functions of the most common record types.
How to configure a DNS server in its different roles.
Setting up a DNS server based on BIND in different scenarios.
What choices and possibilities you have when designing and managing a DNS environment

Target Group

For those who want to be able to install, configure, troubleshoot and manage DNS services in different sets and environments.

Prerequisites

Basic knowledge of network communication with TCP/IP. For the laboratory sessions, it makes it easier to use UNIX, but it is not a necessary requirement.

Certification

This course does not have any associated certification. Each participant who completes the course receives a course certificate.

Trainer

This course is led by Jörgen Strandberg, who is one of Informator’s most experienced and appreciated trainers.

More about the course

1. structure

History
DNS construction and queries
Functions of the different posts
Domain versus zone
Recursive or Iterative requests
Connection between different levels
ROOT
Top Level Domain (TLD)
Domain name

2. basic configuration

Repetition of Linux commands
Configuration files
Setting up a zone
Tools to monitor/control/configure BIND
Verification of functionality and configuration

3. delegation of domains

Purpose and meaning of delegation
Interaction between upper/underlying servers
Glue records
Administrative interaction

4. Master and slave servers

Security, Redundancy
AXFR, IXFR
Zone Transfers
Interaction between Master and Slave
Zone files and synchronization control

5. DNS in detail

Basic package format
Recursion, Caching
Post types
Access rights
Forwarders

6. Delegation in practice

How does it work in Sweden, other countries and between operators?
Within your own organization?
RIR and IP addresses

7. Reverse lookup

Management of in-addr.arpa
Delegation of CIDR blocks

8. Security and DNS

Vulnerabilities, Security Holes and Updates
DNSSEC, TSIG
Securing our DNS environment
Attacks against DNS
DNS Cache Poisoning
D.O.S attacker
AXFR transfers

9. Advanced configuration of BIND

Address translation
Multiple Views / Split DNS
IPv6 lookup and configuration
ÅÄÖ in domain names (IDN)
DNS and DHCP, Dynamic updates
Interconnection with SPAM protection.

Exercises:

Installation and set-up of BIND.
Delegation of forward and reverse domains.
Communication with upper and lower domains.
Configuring the firewall with BIND
Setting up office networks with multiple views.
Testing and verification of BIND configuration
Securing BIND in a chrooted environment

Course overview

3 days

Advanced

Can’t find a (suitable) date, but are interested in the course? Send in an expression of interest and we will do what we can to get an opportunity that suits.

För samtliga utbildningar gäller våra
Allmänna Villkor.

Company-adapted course

The course can be adapted from several perspectives:

Content and focus area
Scope of application
Structure

In collaboration with the course leader, we make sure that the course meets your wishes