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Module 2: Configuring Domain Name Service for Active Directory ® Domain Services

Module 2: Configuring Domain Name Service for Active Directory ® Domain Services. Module Overview . Overview of Active Directory Domain Services and DNS Integration Configuring Active Directory Integrated Zones Configuring Read-Only DNS.

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Module 2: Configuring Domain Name Service for Active Directory ® Domain Services

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  1. Module 2: Configuring Domain Name Service for Active Directory® Domain Services

  2. Module Overview • Overview of Active Directory Domain Services and DNS Integration • Configuring Active Directory Integrated Zones • Configuring Read-Only DNS

  3. Lesson 1: Overview of Active Directory Domain Services and DNS Integration • Active Directory Domain Services and DNS Namespace Integration • What Are Service Resource Locator Records? • Demonstration: SRV Locator Records Registered by AD DS Domain Controllers • How Service Resource Locator Records Are Used • Integration of Service Resource Locator Records and Active Directory Sites

  4. Active Directory Domain Services and DNS Namespace Integration WoodgroveBank.com WoodgroveBank.com Corp.WoodgroveBank.com Woodgrovecorp.com Active Directory domain names must use DNS names

  5. What Are Service Locator Records? SRV resource records allow DNS clients to locate TCP/IP-based Services. SRV resource records are used when: • A domain controller needs to replicate changes • A client computer logs on to Active Directory • A user attempts to change his or her password • An Exchange 2003 server performs a directory lookup • An administrator modifies Active Directory SRV record syntax: protocol.service.name TTL class type priority weight port target Example of an SRV record _ldap._tcp.contoso.msft 600 IN SRV 0 100 389 den-dc1.contoso.msft

  6. Demonstration: SRV Resource Records Registered by AD DS Domain Controllers In this demonstration, you will see how to view and manage the SRV resource records registered by domain controllers

  7. How Service Resource Locator Records Are Used Locator initiates a call to Net Logon service 1 Locator collects information about the client 2 Net Logon uses the information and queries DNS for SRV resource records 3 Net Logon tests connectivity to target servers 4 Domain controllers respond, indicating that they are operational 5 Net Logon returns the information to clients 6

  8. Integration of Service Locator Records and Active Directory Sites 1. Queries DNS for DC 2. Responds with multiple records 5. Queries DNS for DC in NYC site Local DNS Server 6. Responds with DC in NYC site 3. Contacts MIA-DC1 by using LDAP 4. MIA-DC1 returns site info NYC MIA-DC1 NYC-DC1 NYC Site Miami Site

  9. Lesson 2: Configuring Active Directory Integrated Zones • What Are Active Directory Integrated Zones? • What Are Application Partitions in AD DS? • Options for Configuring Application Partitions for DNS • How Dynamic Updates Work • How Secure Dynamic DNS Updates Work • Demonstration: Configuring AD DS Integrated Zones • How Background Zone Loading Works

  10. What Are Active Directory Integrated Zones? Active Directory integrated zones store DNS zone data in the Active Directory database Benefits of using Active Directory integrated zones: • Replicates DNS zone information using Active Directory replication • Supports multiple master DNS servers • Enhances security • Supports record aging and scavenging

  11. What Are Application Partitions in AD DS? The Active Directory database is divided into directory partitions, with each directory partition replicated to specific domain controllers • A DNS zone can be stored in the domain partition or in an application partition • Administrators can define the replication scope of customapplication partitions • DomainDNSzones and forestDNSzones are default application partitions that store DNS-specific data Domain Domain Config Config Domain Schema Schema Config App1 App1 Schema App2

  12. Options for Configuring Application Partitions for DNS Domain Config Schema DomainDNSZone ForestDNSZones CustomApp DNS information can be stored in a variety of application partitions To all domain controllers in the Active Directory domain To all domain controllers that are DNS servers in the Active Directory domain To all domain controllers that are DNS servers in the Active Directory forest To all domain controllers in the replication scope for the application partition

  13. How Dynamic Updates Work Client sends SOA query 1 DNS server sends zone name and server IP address DNSServer Resource Records 2 Client verifies existing registration 3 1 2 3 4 5 DNS server responds by stating that registration does not exist 4 Client sends dynamic update to DNS server 5 Windows Server 2008 Windows Vista Windows XP

  14. How Secure Dynamic DNS Updates Work Find authoritative server A secure dynamic update is accepted only if the client has the proper credentials to make the update Local DNS Server WindowsVista DNS Client Result Find authoritative server Result Attempt nonsecure update Refused Domain Controller with Active Directory Integrated DNS Zone Secure update negotiation Accepted

  15. Demonstration: Configuring AD DS Integrated Zones In this demonstration, you will see how to configure: • A DNS zone as AD DS integrated • Dynamic updates on DNS zones • Dynamic update settings on a network connection • Secure dynamic updates

  16. How Background Zone Loading Works When a domain controller with Active Directory integrated DNS zones starts, it: • Enumerates all zones to be loaded • Loads root hints from files or AD DS servers • Loads all zones that are stored in files rather than in AD DS • Begins responding to queries and RPCs • Starts one or more threads to load the zones that are stored in AD DS

  17. Lesson 3: Configuring Read-Only DNS • What Is Read-Only DNS? • How Read-Only DNS Works • Discussion: Comparing DNS Options for Branch Offices

  18. What Is Read-Only DNS? • A feature supported on Read-Only Domain Controllers • All application partitions containing DNS information are replicated to the RODC Benefits: • DNS information required for Active Directory name resolution is available for clients in the same site as the RODC • Changes are not allowed on the read-only DNS zone, which increases security

  19. How Read-Only DNS Works Read-only DNS is installed on an RODC when AD DS is installed and the DNS option is selected • Read-only DNS zone data can be viewed, but cannot be updated • Dynamic DNS updated clients using the RODC are referred to a DNS server with a writeable copy of the zones • Records cannot be manually added to the read-only zone 1 2 3

  20. Discussion: Comparing DNS Options for Branch Offices • What options other than read-only DNS are available for implementing DNS in the branch office? • What are the advantages and disadvantages of each option?

  21. Lab: Configuring AD DS and DNS Integration • Exercise 1: Configuring Active Directory Integrated Zones • Exercise 2: Configuring Read-Only DNS Zones Logon information Estimated time: 45 minutes

  22. Lab Review • What would be the advantage to storing the Active Directory integrated DNS zones in a custom application partition instead of the default partitions? • What steps could you take to recover the SRV resource records if they were deleted or corrupted? • Who can create Active Directory integrated zones?

  23. Module Review and Takeaways • Review questions • Module key points

  24. Beta Feedback Tool • Beta feedback tool helps: • Collect student roster information, module feedback, and course evaluations. • Identify and sort the changes that students request, thereby facilitating a quick team triage. • Save data to a database in SQL Server that you can later query. • Walkthrough of the tool

  25. Beta Feedback • Overall flow of module: • Which topics did you think flowed smoothly from topic to topic? • Was something taught out of order? • Pacing: • Were you able to keep up? Are there any places where the pace felt too slow? • Were you able to process what the instructor said before moving on to next topic? • Did you have ample time to reflect on what you learned? Did you have time to formulate and ask questions? • Learner activities: • Which demos helped you learn the most? Why do you think that is? • Did the lab help you synthesize the content in the module? Did it help you to understand how you can use this knowledge in your work environment? • Were there any discussion questions or reflection questions that really made you think? Were there questions you thought weren’t helpful?

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