In addition to authoritative zones, the NIOS appliance allows you to configure delegated, forward, and stub zones. A delegated zone is a zone managed by (delegated to) another name server who owns the authority for the zone. A forward zone is where queries are sent before being forwarded to other remote name servers. A stub zone contains records that identify the authoritative name servers in another zone. This section covers the following topics:

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1. From the Data Management tab, select the DNS tab -> Zones tab.

2. Click the parent zone to open it.
   Grid Manager displays the Records and Subzones tabs of the zone.

3. From the Subzones tab, click the Add icon -> Zone -> Add Delegation.

4. In the Add Delegation wizard, specify the following:

   • Name: This field displays a dot followed by the domain name of the current zone. Enter one or more labels before the dot to specify the domain name of the subzone.

   • DNS View: This field displays only when there is more than one DNS view in the network view. Displays the DNS view of the current zone.

   • Comment: Optionally, enter additional text about the zone.

   • Disable: Click this checkbox to temporarily disable this zone. For information, see Enabling and Disabling Zones. Note that disabling a zone may take a longer time to complete depending on the size of the data.

   • Lock: Click this checkbox to lock the zone so that you can make changes to it, and also prevent others from making conflicting changes. For information, see Locking and Unlocking Zones.

5. Click Next to assign a delegation name server group or define the name servers for the zone. Select one of the following:

   • Use this nameserver group: Select this to assign a delegation NS group for the delegated zone. You can select the delegation NS group from the drop-down list.

   • Use this set of nameservers: Select this to define name servers for the delegated zone. In the Name Servers panel, click the Add icon and specify the following information:

     • Name: Enter the name of a remote name server to which you want the local server to redirect queries for zone data. This is a name server that is authoritative for the delegated zone.

     • Address: Enter the IP address of the delegated server.

   For information about delegation NS group, see Using Delegation Name Server Groups.

6. Save the configuration and click Restart if it appears at the top of the screen, or click Next to define extensible attributes as described in Using Extensible Attributes. or
   Click the Schedule icon at the top of the wizard to schedule this task. In the Schedule Change panel, enter a date, time, and time zone. For information, see Scheduling Tasks.

Configuring a Delegation for a Reverse-Mapping Zone

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1. From the Data Management tab, select the DNS tab -> Zones tab.

2. Click the parent zone to open it.
   Grid Manager displays the Records and Subzones tabs of the zone.

3. From the Subzones tab, click the Add icon -> Zone -> Add Delegation.

4. In the Add Delegation wizard, specify the following:

   • IPv4 Network: This field displays if you are creating a delegation zone for an IPv4 reverse-mapping zone. Enter the IPv4 address for the address space for which you want to define the reverse-mapping zone and select a netmask from the Netmask drop-down list. Alternatively, you can specify the address in CIDR format, such as 192/8.

   • To use an RFC 2317 prefix, select a netmask value that is between 25 to 31, inclusive. Grid Manager displays the following fields:

   • RFC2317 Prefix: Enter a prefix in this field. Prefixes can include alphanumeric characters.

   • Allow manual creation of PTR records in parent zone: Select this checkbox to allow users to create labels that correspond to IP addresses in the delegated address space in the parent zone.

   • For information about RFC 2317, see Specifying an RFC 2317 Prefix.

   • IPv6 Network Prefix: This field displays if you are creating a delegation zone for an IPv6 reverse-mapping zone. Enter the IPv6 prefix for the address space for which you want to define the reverse-mapping zone and select the prefix length from the drop-down list.

   • Name: This field displays a dot followed by the domain name of the current zone. Enter one or more labels before the dot to specify the domain name of the subzone.

   • DNS View: This field displays only when there is more than one DNS view in the network view. Select a DNS view from the drop-down list.

   • Comment: Optionally, enter additional text about the zone.

   • Disable: Select this option to temporarily disable this zone. Note that disabling a zone may take a longer time to complete depending on the size of the data.

   • Lock: Select this option to lock the zone so that you can make changes to it and prevent others from making conflicting changes.

5. Click Next to assign a delegation name server group or define the name servers for the zone. Select one of the following:

   • Use this name server group: Select this to assign a delegation NS group for the delegated zone. You can select the delegation NS group from the drop-down list.

   • Use this set of name servers: Select this to define name servers for the delegated zone. In the Name Servers panel, click the Add icon and specify the following information:

     • Name: Enter the name of a remote name server to which you want the local server to redirect queries for zone data. This is a name server that is authoritative for the delegated zone.

     • Address: Enter the IP address of the delegated server.

   For information about delegation NS groups, see Using Delegation Name Server Groups.

6. Save the configuration and click Restart if it appears at the top of the screen, or click Next to define extensible attributes as described in Using Extensible Attributes. or
   Click the Schedule icon at the top of the wizard to schedule this task. In the Schedule Change panel, enter a date, time, and time zone. For information, see Scheduling Tasks.

Configuring a Forward Zone

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1. From the Data Management tab, select the DNS tab, expand the Toolbar and click Add -> Zone -> Add Forward Zone.

2. In the Add Forward Zone wizard, click Add a forward forward-mapping zone and click Next.

3. Enter the following information, and then click Next:

   • Name: Enter the domain name of the zone for which you want the NIOS appliance to forward queries.

   • DNS View: This field displays only when there is more than one DNS view in the current network view. Select the DNS view of the forward zone.

   • Comment: Enter a descriptive comment.

   • Disable: Click this checkbox to temporarily disable this zone. Note that disabling a zone may take a longer time to complete depending on the size of the data.

   • Lock: Click this checkbox to lock the zone so that you can make changes to it and prevent others from making conflicting changes.

4. Click Next to assign a forward/stub server name server group or define the default zone forwarders to which the NIOS appliance forwards queries for the zone. Select one of the following:

   1. Select Use this name server group to assign a forward/stub server NS group for the zone. You can select the forward/stub server NS group from the drop-down list. For information about forward/stub server NS groups, see Using Forward/Stub Server Name Server Groups.

   2. Select Use this set of name servers to specify the default servers for the zone. Click the Add icon and specify the following:

      • Name: Enter a domain name of the server to which you want the NIOS appliance to forward queries.

      • Address: Enter the IP address of the server to which you want the NIOS appliance to forward queries.

   3. Select Disable auto-generation of NS records in parent authoritative zone to disable generation of name server records in a parent authoritative zone that has a subzone, which is conditionally forwarded. The NIOS appliance will not generate name server records and deletes the existing records from the parent authoritative zone when you select the checkbox. Note that the checkbox is clear, by default, which means that the NIOS appliance automatically generates name server records in a parent authoritative zone.

   4. Select Use Forwarders Only if you want the NIOS appliance to query forwarders only (not root servers) to resolve domain names in the zone.

5. Click Next to assign a forwarding member name server group or define Grid members to serve the forward-mapping zone. Select one of the following:

   Note that if you do not define any Grid members to serve the forward-mapping zone, then the named.conf file will not contain the configuration of the newly created forward zone. Hence, the Infoblox DNS server will not be authoritative to the forward zone and by default, the Infoblox DNS server will query the root servers to resolve queries for the forward zone.

   1. Select Use this name server group to assign a forwarding member NS group for the zone. You can select the forwarding member NS group from the drop-down list. For information about forwarding member NS groups, see Using Forwarding Member Name Server Groups.

   2. Select Use this set of name servers to define the Grid members and use the default forwarders or you can override default forwarders and configure custom forwarders. Click the Add icon to select the NIOS appliance on which the forward zone is configured. For an independent deployment, select the local appliance (it is the only choice). If there are multiple Grid members, the Member Selector dialog box is displayed. Select the required member by clicking the member name.
      The following is displayed for each Grid member:

      • Name: Displays the name of the Grid member.

      • IPv4 Address: Displays the IPv4 address of the Grid member.

      • IPv6 Address: Displays the IPv6 address of the Grid member.

      • Override Default Forwarders: Displays Yes when you override default forwarders. Otherwise, this field displays No.

      • Custom Forwarders: Displays the IP address of the custom forwarders. Otherwise, this field is blank.

        Note to skip the following two steps if you want to use the default forwarders.

6. Select a member and click the Edit icon.

7. In the Edit Per-Member Forwarders editor, select the Override Default Forwarders checkbox to override the default forwarders. The Default Zone Forwarders table becomes available only after you select the Override Default Forwarders checkbox. Click the Add icon to specify the servers to which the NIOS appliance forwards queries for the zone:

   • Name: Enter a domain name for the server to which you want the NIOS appliance to forward queries for the specified domain name.

   • Address: Enter the IP address of the server to which you want the NIOS appliance to forward queries.

   • Select Use Forwarders Only if you want the NIOS appliance to query forwarders only (not root servers) to resolve domain names in the zone.

   • Save the configuration. After successfully saving the configuration, the Override Default Forwarders column displays Yes and the Custom Forwarders column displays the IP address of the forwarders.
     To configure forwarders for multiple members, repeat the steps for each Grid member.

8. Save the configuration, or click Next to continue to the next step where you define extensible attributes as described in Using Extensible Attributes, and then optionally proceed to the next step where you define admin permissions as defined in About Administrative Permissions.
   or
   Click the Schedule icon at the top of the wizard to schedule this task. In the Schedule Change panel, enter a date, time, and time zone. For information, see Scheduling Tasks.

9. Click Restart if it appears at the top of the screen.

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1. From the Data Management tab, select the DNS tab, expand the Toolbar and click Add -> Zone -> Add Stub Zone.

2. In the Add Stub Zone wizard, click Add a stub IPv4 reverse-mapping zone and click Next.

3. Specify the following:

   • IPv4 Network: Enter the IPv4 address for the address space for which you want to define the

   • reverse-mapping zone and select a netmask from the Netmask drop-down list. Alternatively, you can specify the address in CIDR format, such as 192/8.

   • To use an RFC 2317 prefix, select a netmask value that is between 25 to 31, inclusive. Grid Manager displays the RFC 2317 Prefix field. Enter a prefix in the text field. Prefixes can be alphanumeric characters. For information, see Specifying an RFC 2317 Prefix.
     or

   • Name: Enter the domain name of the reverse-mapping zone.

   • DNS View: This field displays only when there is more than one DNS view in the network view. Select a DNS view from the drop-down list.

   • Comment: Optionally, enter additional information about the zone.

   • Disable: Click this checkbox to temporarily disable this zone. Note that disabling a zone may take a longer time to complete depending on the size of the data.

   • Lock: Click this checkbox to lock the zone so that you can make changes to it, and also prevent others from making conflicting changes.

4. Click Next to define primary servers in the stub zone. You can specify a forward/stub server NS group or define the servers individually. Select one of the following:

   • Select Use this name server group to assign a forward/stub server NS group for the stub zone. You can select the forward/stub server NS group from the drop-down list. For information about forward/stub server NS group, see Using Forward/Stub Server Name Server Groups.

   • Select Use this set of name servers to define primary servers for the stub zone. Click the Add icon and enter the Name and IP Address of the primary server in the stub zone.
     If the primary server is a Grid member, you must enter the host name and IP address of the Grid member. The NIOS appliance does not validate these entries. Therefore, if you change the IP address of a Grid member listed here, you must update the Grid member information in this list as well.
     You can specify multiple primary servers for redundancy. If the primary server is a NIOS appliance, the appliance must have the Minimal Response feature disabled so it can propagate the data to the stub server. For information about the Minimal Response feature, seeSpecifying Minimal Responses.
     Optionally, click the Don't use forwarders to resolve queries in subzones checkbox to indicate that the name servers hosting the stub zone should not forward queries that end with the domain name of the stub zone to any configured forwarders.

5. Click Next to specify a stub member NS group or define the name servers individually to serve the reverse-mapping stub zone. Select one of the following:

   • Select Use this name server group to assign a stub member NS group for the zone. You can select the forward/stub server NS group from the drop-down list. For information about stub member NS group, see Using Stub Member Name Server Groups.

   • Select Use this set of name servers to define the servers individually. Click the Add icon and select one of the following:

     • Add Infoblox Member: Select this and select the Grid member that hosts the stub zone.

     • Add Microsoft Server: Select this and select the Microsoft server that hosts the stub zone. The following is displayed for each name server:

     • Name: Displays the name of the name server.

     • IPv4 Address: Displays the IPv4 address of the name server.

     • IPv6 Address: Displays the IPv6 address of the name server.

6. Click Next to continue to the next step where you define extensible attributes as described in Using Extensible Attributes.

7. Save the configuration and click Restart if it appears at the top of the screen
   or
   Click the Schedule icon at the top of the wizard to schedule this task. In the Schedule Change panel, enter a date, time, and time zone. For information, see Scheduling Tasks.

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