Cursus inhoud

• DNS operation
• nomenclature
• hierarchy
• types of DNS servers
• forward and reverse mapping
• classless reverse mapping
• types of data in DNS and their usage
• DNS architecture
• types of DNS servers and their location
• Robustness – built-in fail-over
• Troubleshooting DNS problems
• Querying DNS
• Error compromising the DNS hierarchy
• Errors with respect to DNS content
• More hard to catch error conditions
• credibility of DNS servers
• TTL troubles
• Security aspects of DNS
• intrinsic dangers of the DNS protocol
• TSIG and DNSSEC
• DNS and high availability
• ISP and server load balancing

DEMO’S

• The theory is illustrated with plenty of examples based on publicly available DNS information on the internet.

Doelgroep

This course is of great interest for all network users, administrators of DNS servers but also network administrator and architects will get plenty of practical and directly usable information. Internet security advisors will find a lot of interesting and usable information in this course.

Voorkennis

Basic knowledge of TCP/IP protocols is sufficient to attend this course. Mainly concept and methods will be explained. As such, knowledge of a specific type of DNS server implementation is not explicitly required.