Chapter 13

Microsoft DNS ServerMicrosoft DNS ServerMicrosoft DNS ServerMicrosoft DNS Server

DNS server: A Microsoft service that DNS server: A Microsoft service that resolves computer names to IP resolves computer names to IP addresses, such as resolving the addresses, such as resolving the computer name Brown to IP address computer name Brown to IP address 129.77.1.10, and that resolves IP 129.77.1.10, and that resolves IP addresses to computer namesaddresses to computer names

Chapter 13

Design NoteDesign NoteDesign NoteDesign Note

When you install Active Directory, you When you install Active Directory, you must have at least one DNS servermust have at least one DNS server

A DNS server is also needed for an IIS A DNS server is also needed for an IIS serverserver

Chapter 13

Installing DNS ServerInstalling DNS Server Installing DNS ServerInstalling DNS Server

Install DNS as a Windows component Install DNS as a Windows component from the Control Panel Add/Remove from the Control Panel Add/Remove Programs iconPrograms icon

Double-click Double-click Networking ServicesNetworking Services in the in the Windows Components dialog box and Windows Components dialog box and select select Domain Name System (DNS)Domain Name System (DNS)

Chapter 13

Selecting DNSSelecting DNSSelecting DNSSelecting DNS

Figure 13-8 Installing Microsoft DNSFigure 13-8 Installing Microsoft DNS

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Design TipDesign TipDesign TipDesign Tip

Assign a static IP address to DNS Assign a static IP address to DNS serversservers

On medium and large sized networks, On medium and large sized networks, configure at least two DNS servers on configure at least two DNS servers on the same or different networks in case the same or different networks in case one failsone fails

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Configuring DNSConfiguring DNSConfiguring DNSConfiguring DNS

Configure a forward and reverse lookup zone Configure a forward and reverse lookup zone in the DNS server:in the DNS server: Forward lookup zone: A DNS server zone or table Forward lookup zone: A DNS server zone or table

that maps computer names to IP addressesthat maps computer names to IP addresses Reverse lookup zone: A DNS server zone or table Reverse lookup zone: A DNS server zone or table

that maps IP addresses to computer namesthat maps IP addresses to computer names Zones are created and managed by using the Zones are created and managed by using the

DNS tool in the Administrative Tools menuDNS tool in the Administrative Tools menu

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Viewing a Forward Viewing a Forward Lookup ZoneLookup Zone

Viewing a Forward Viewing a Forward Lookup ZoneLookup Zone

Figure 13-9 DNS Forward lookup zoneFigure 13-9 DNS Forward lookup zone

Chapter 13

Creating a Reverse Lookup ZoneCreating a Reverse Lookup ZoneCreating a Reverse Lookup ZoneCreating a Reverse Lookup Zone

Figure 13-10 Creating a reverse lookup zoneFigure 13-10 Creating a reverse lookup zone

Chapter 13

SubnetsSubnetsSubnetsSubnets

Folders can be created in a reverse lookup Folders can be created in a reverse lookup zone to reflect subnetszone to reflect subnets

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Reverse Lookup Zone Reverse Lookup Zone Subnet FoldersSubnet Folders

Reverse Lookup Zone Reverse Lookup Zone Subnet FoldersSubnet Folders

Figure 13-11 Reverse lookup zone subfolders for subnetsFigure 13-11 Reverse lookup zone subfolders for subnets

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Forward Lookup Zone RecordsForward Lookup Zone RecordsForward Lookup Zone RecordsForward Lookup Zone Records

A forward lookup zone typically contains a A forward lookup zone typically contains a host address (A) resource record: host address (A) resource record: Host address (A) resource record: A record in Host address (A) resource record: A record in

a DNS forward lookup zone that consists of a a DNS forward lookup zone that consists of a computer name correlated to an IP version 4 computer name correlated to an IP version 4 addressaddress

Chapter 13

Configuring a Host Address (A) Configuring a Host Address (A) Resource RecordResource Record

Configuring a Host Address (A) Configuring a Host Address (A) Resource RecordResource Record

Figure 13-12 Creating a host address (A) resource recordFigure 13-12 Creating a host address (A) resource record

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Reverse Lookup Zone RecordsReverse Lookup Zone RecordsReverse Lookup Zone RecordsReverse Lookup Zone Records

A reverse lookup zone typically contains a A reverse lookup zone typically contains a pointer (PTR) resource record:pointer (PTR) resource record: Pointer (PTR) resource record: A record in a Pointer (PTR) resource record: A record in a

DNS reverse lookup zone that consists of an DNS reverse lookup zone that consists of an IP (version 4 or 6) address correlated to a IP (version 4 or 6) address correlated to a computer namecomputer name

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Creating a PTR recordCreating a PTR record

Figure 13-13 Creating a PTR recordFigure 13-13 Creating a PTR record

Chapter 13

Troubleshooting DNSTroubleshooting DNSTroubleshooting DNSTroubleshooting DNS

If DNS is not working, make sure that If DNS is not working, make sure that the DNS Server and DNS Client the DNS Server and DNS Client services are started and set to start services are started and set to start automaticallyautomatically

Chapter 13

DNS TermsDNS Terms

Cache only ServerCache only Server A caching only name server is a DNS

Server that is not authoritative for any particular domain. Its only function is to look up names for clients and cache them.

Chapter 13

DNS TermsDNS Terms

DNS ForwarderDNS Forwarder DNS servers can be configured to send all

recursive queries to a selected list of servers, known as forwarders.

Forwarders are often desirable when access to remote DNS servers requires use of a slow link, such as a fast-speed internal network linked to the Internet over a relatively low-speed connection. Using forwarders in this situation can cut down on expensive traffic over the low-speed link.

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Describe how a DNS name gets resolved

Describe how a DNS name gets resolved

Chapter 13

Using Microsoft WINSUsing Microsoft WINSUsing Microsoft WINSUsing Microsoft WINS

Install and use Microsoft WINS to Install and use Microsoft WINS to resolve NetBIOS computer namesresolve NetBIOS computer names

WINS is installed as a Windows WINS is installed as a Windows component via the Control Panel component via the Control Panel Add/Remove Programs tool Add/Remove Programs tool WINS is a subcomponent of the WINS is a subcomponent of the

Networking Services Windows componentNetworking Services Windows component