Windows Server 2003 System Administration Part 1

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Windows Server 2003 System Administration Part 1

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A recursive query is a query made to a DNS server, in which the DNS client asks the DNS server to provide a complete answer to the query

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Nội dung Text: Windows Server 2003 System Administration Part 1

  1. Windows Server 2003 DNS
  2. What Is a Domain Namespace? Root Domain Top-Level net com org Domain Second-Level nwtraders Domain Subdomains west south east FQDN: server1.sales.south.nwtrade sales Host: server1
  3. Overview of the DNS Query Process Query Types The DNS server returns the best answer that it can Iterative Query provide without help from other servers The DNS server returns a complete answer to the Recursive Query query, not a pointer to another DNS server Lookup Types Forward Lookup Requires name-to-address resolution Reverse Lookup Requires address-to-name resolution
  4. How Recursive Queries Work A recursive query is a query made to a DNS server, in which the DNS client asks the DNS server to provide a complete answer to the query DNS server checks the forward lookup zone and cache for an answer to the query Recursive query for mail1.nwtraders.c om Database Computer1 Local DNS Server
  5. How Iterative Queries Work An iterative query is a query made to a DNS server in which the DNS client requests the best answer that the DNS server can provide without seeking further help from other DNS servers. The result of an iterative query is often a referral to another DNS server lower in the DNS tree Iterative Query Local Ask Root Hint (.) DNS Server .com Iterati ve m .co r Query rad ry fo A .com nwtra sk ers nwt e que ders.c .11 o Iter m ativ ma ursiv .64 Auth eQ orita uery .16 il1. tive Rec Res 172 pon se Computer1
  6. How Root Hint Works Root hints are DNS resource records stored on a DNS server that list the IP addresses for the DNS root servers Corp. or ISP InterNIC DNS Servers Root (.) Servers Root Hints Local com DNS Server microso Computer1 ft
  7. How Forwarders Work A forwarder is a DNS server designated by other internal DNS servers to forward queries for resolving external or offsite DNS domain names Iterative Query Forwarder Root Hint (.) Ask Iterati .com ve Qu y ery er Qu Ask n .com 1 wtrad 4.1 ve m rsi 6.6 Iter cu ativ 2.1 Auth eQ Re orita uery 17 172 tive .16.6 Res Recu 4.11 pon rsive se mail 1.nw query trad fo Local ers.c r om Computer1 DNS Server
  8. What Is a DNS Zone? Nwtraders South West North Sales Support Training
  9. What Are DNS Zone Types? Zones Description Primary Read/write copy of a DNS database Read/Write Secondary Read-only copy of a DNS database Read-Only Stub Copy of a zone containing limited Copy of limited records records
  10. Selecting Zone Data Location Standard Zones Zone Transfer Change Primary Zone Secondary Zone Active Directory Integrated Zones Zone Transfer Change Change Change
  11. Configuring Standard Zones • You can configure a DNS server to host standard primary zones, standard secondary zones, or any combination of zones • You can designate a primary server or a secondary server as a master server for a standard secondary zone DNS Server A A Primary Zone Zone Informati DNS Server DNS Server B on C Secondary Zone Secondary Zone B (Master DNS Server = (Master DNS Server = C DNS Server A) DNS Server A)
  12. What Are Resource Records and Record Types? Record type Description A Resolves a host name to an IP address PTR Resolves an IP address to a host name SOA The first record in any zone file SRV Resolves names of servers providing services NS Identifies the DNS server for each zone MX The mail server CNAME Resolves from a host name to a host name
  13. Zone Transfer Process A Zone Transfer is Initiated When – A master DNS server sends notification of zone changes to the secondary server or servers – The secondary server queries a master DNS server for changes to the zone file DNS Serve DNS r Server (Maste r) Primary Zone nwtraders Secondary Zone Database File Database File support training Zone 1
  14. Configuring Zone Transfers • Zone Transfer Types – Full zone transfer (AXFR) – Incremental zone transfer (IXFR) • Configuring Zone Transfer Properties Serial number: 2 Increment Refresh interval: 15 minutes Retry interval: 10 minutes Expires after: 1 days Minimum (default) TTL: 0 :1 :0 :0 • Configuring DNS Notify
  15. Configuring Zone Transfers nwtraders.msft Properties WINS Zone Transfers Security nwtraders.msft Properties General Start of Authority (SOA) Name Servers General Start of Authority (SOA) Name Servers Serial number: Zone Transfers WINS Security 28 Increment A zone transfer sends a copy of the zone to requesting servers. Primary server: Allow zone transfers Browse… To any server Responsible person: Only to servers listed on the Name Servers tab Browse… Only to the following servers Refresh interval: 15 minutes IP address: Retry interval: 10 minutes Add Expires after: 1 days Remove Minimum [default] TTL: 0 :1 :0 :0 To specify secondary servers to be notified of zone TTL for this record: 0 :1 :0 :0 updates, click Notify. Notify… OK Cancel Apply OK Cancel Apply
  16. How DNS Notify Works A DNS notify is an update to the original DNS protocol specification that permits notification to secondary servers when zone changes occur Resource Destination Server 1 record is Source Server updated 2 SOA serial number is updated 3 DNS notify 4Zone transfer Secondary Server Primary and Master Server
  17. Configuring AD Integrated Zones • Active Directory Integrated Zone Data Is – Stored as an Active Directory object – Replicated as part of domain replication Active Directory Integrated Zone Active Directory m DNS Server
  18. What Are Directory Partitions? Contains: Definitions and rules for creating and manipulating objects and attributes Forest Schema Information about the Active Directory structure Configuration Information about Domain domain-specific objects Configurable Information about replication applications Active Directory Database
  19. Selecting a Partition Forest Application Domain Application Domain Partition
  20. Configuring Dynamic Updates • DNS Dynamic Update Protocol – Allows clients to automatically update DNS servers – Can be used in conjunction with DHCP 1 Request for IP address DHCP Server Assign IP address2 of updates reverse Windows client resource record for updates forward Windows 2000, XP and resource record 2003 clients and both on DNS server resource records for Computer1 other clients DNS Server Zone Database


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