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You can create subscriber sites and add a Grid member as a collector member and RPZ members to the site in order to scale the number of subscribers that the system can support. The subscriber collector caches the subscriber data received from the NAS gateways and parental control policies the from Infoblox Harmony product. The RPZ members use the cached subscriber data and the policies to resolve DNS queries. You can add a maximum of five Grid members to the subscriber site. Note that one Grid member can serve only one subscriber site. The subscriber identity information cached in the subscriber cache is replicated between the Grid members in the subscriber site.

In a strict NAT configuration, where only the NATed subscribers are allowed, the value of the AVP Deterministic NAT port must be a non zero value in the RADIUS accounting message. The ports from 1-1023 (inclusive) are reserved in a deterministic port configuration.

Adding Subscriber Sites

To add a subscriber site, complete the following:

  1. From the Data Management tab -> DNS tab -> Subscriber Services Deployment tab -> Subscriber Sites tab, click the Add icon.
  2. In the Add Subscriber Site wizard, complete the following:
    1. Name: Enter the name of the subscriber site.
    2. Maximum Subscribers: Specify the maximum number of subscribers for the subscriber site. This represents the overall size of the subscriber cache. You can enter a value between 10000 to 10000000.
    3. Comment: You can enter additional information about the subscriber site.
    4. Members: In the Members table, click the Add icon to add Grid members to the site. If there are multiple members, the Member Selector dialog box is displayed, from which you can select a member. Click the required member name in the dialog box. You can also delete a member from the list.
      Note that a Grid member can support only one subscriber site.

    5. Deterministic NAT Block Size: The block size specifies the number of ports made available for each incoming subscriber address. In a deterministic NAT, zero means not using NAT. The value can be any number from 0 to 64512. 
    6. First port: The value of the first usable port for the subscriber. The first usable port will have a default value of 1024, and the value can be any number from 1024 to 65535, both inclusive.
    7. : Select this option to restrict only NATed subscribers. Here the IP address and port block allocations are made dynamically for the subscriber instance.

  3. Click Next to configure NAS gateways for the subscriber site. Complete the following:
    1. Listen on RADIUS port number: Enter the UDP port number that the collector member uses to collect accounting information from the NAS gateway. You can enter an integer from 1 to 65535. The default is 1813.
    2. NAS Gateways: You must add at least one NAS gateway to the subscriber site in order to start the subscriber collection service. You can add up to 20 NAS gateways. Click the Add icon and complete the following to add a NAS gateway:
      1. Name: Enter the name of the NAS gateway.
      2. IP Address: Enter the IP address of the NAS gateway.
      3. Shared Secret: Enter a shared secret that can be used to authenticate the communication between the RADIUS accounting server and the collector member. This shared secret must match the one you entered on the RADIUS server.
      4. Confirm Shared Secret: Enter the shared secret again.
      5. Send Protocol Acknowledgment: Select this check box to send an acknowledgment to the client when the collector member receives accounting information from the NAS gateway.
      6. Comment: Enter additional information about the NAS gateway.
      7. Click Add to add the NAS gateway.
        You can select a NAS gateway configuration and click the Edit icon to modify it or click the Delete icon to delete it.

  4. This step is required only if Infoblox Subscriber Parental Control is enabled. For information about enabling Parental Control, see Infoblox Subscriber Parental Control. Click Next to configure the parental control blocking IP addresses. Complete the following:

    1. Content Proxy Addresses: You can add IP addresses of the Infoblox Harmony product. The appliance will forward the subscriber session to Infoblox Harmony for in-line processing of the subscriber session, depending on the policies. Click the Add icon. Grid Manager adds a row to the Content Proxy Addresses table. It is recommended that you enter two addresses in this field. The first address is considered the primary address and the second address is considered the secondary address. If you enter only one address, the same address is considered the primary and secondary address. Click the row and enter the IP address in the Address field. To delete an IP address, select the check box and then click the Delete icon.
    2. Proxy RPZ Passthru: Select this check box if you want to proxy the traffic to the MSP (Multi-Services Proxy) server. If you select this check box, and a passthru rule from any RPZ zone is hit, then the query resolves to an MSP proxy virtual IP address and NIOS generates a "synthetic resolution”. If you do not select this check box and a passthru rule from any RPZ zone is hit, then the query resolves normally. This check box is disabled and you will not be able to enable it until you add a context proxy address.

      Note

      If you want to enable and run DNS over TLS, DNS over HTTPS, and Parental Control features simultaneously on a member, ensure that the appliance meets the base memory configuration requirements defined in Configuration Requirements. If you try to run these features when the required memory configuration is not available, then all of these features will be disabled.

    3. Additional Blocking Servers: Besides the IP addresses you specify in the Parental Control Blocking IP Addresses fields, you can specify additional IP addresses that will act as blocking servers for the blocking policies you defined when configuring blocking server policies. Click the Add icon. Grid Manager adds a row to the Additional Blocking Servers table. Click the row and select a blocking policy. In the Address field, enter the IP address of the blocking server that will contain the selected blocking policy. To delete an IP address, select the check box and then click the Delete icon. 
    4. Parental Control Blocking IP Addresses: You can configure two sets of IPv4 and IPv6 addresses that are used as blocking VIP addresses. The parental control subscribers are redirected to the following blocking IP addresses whenever the domain queried by the subscriber is blocked based on the subscriber parental control policy. 

      Complete the following:

      1. IPv4 Address (primary): Enter the primary blocking IPv4 address.
      2. IPv4 Address (secondary): Enter the secondary blocking IPv4 address.
      3. IPv6 Address (primary): Enter the primary blocking IPv6 address.
      4. IPv6 Address (secondary): Enter the secondary blocking IPv6 address.


    5. Policy Management Addresses: You can add IP addresses of the policy management servers to which the appliance sends APIs about the expired parental control policies. Click the Add icon. Grid Manager adds a row to the Policy Management Addresses table. Click the row and enter the IP address in the Address field. To delete an IP address, select the check box and then click the Delete icon.
  5. Save the configuration, or click Next to continue to the next step where you define extensible attributes as described in Managing Extensible Attributes.

Modifying Subscriber Sites

To modify a subscriber site, complete the following:

  1. From the Data Management tab -> DNS tab -> Subscriber Services Deployment tab -> Subscriber Sites tab, click the Action icon next to the subscriber site name and select Edit from the menu.
  2. The Subscriber Site Properties editor provides the following tabs from which you can modify data:
    1. On the General tab, you can modify the information you previously entered through the wizard, as described in Adding Subscriber Sites.
    2. On the NAS Gateways tab, you can edit the NAS gateways configured for the subscriber site, as described in Adding Subscriber Sites.

      Note

      If you make any changes to the NAS gateway configuration, the subscriber collector will automatically restart within 30 seconds. However, the subscriber data collected in the subscriber cache is not affected by the NAS gateway configuration changes

    3. If parental control is enabled, the Parental Control tab is displayed. You can modify information on the Parental Control tab as described in Adding Subscriber Sites. On the Advanced tab, you can modify the details pertaining to the DCA subscriber.

      Note

      If you want to enable and run DNS over TLS, DNS over HTTPS, and Parental Control features simultaneously on a member, ensure that the appliance meets the base memory configuration requirements defined in Configuration Requirements. If you try to run these features when the required memory configuration is not available, then all of these features will be disabled.

      1. Enable DCA subscriber Query count logging: Select this check box to allow the DCA to generate subscriber logs and to record query counts greater than or equal to zero for subscriber query count updates and deletions. These logs are generated for deletions even when the query count is equal to zero. By default, this option is disabled.
      2. Enable DCA subscriber Allowed & Blocked list support: Select this check box to support the blocked and allowed list of subscribers. This option is disabled by default. Once the domain is cached, the blocked lists are provided by DCA. Domains in the allowed list are transferred to BIND. There are several members on the site, but the memory requirement is 32GB or higher for all the vDCA capable members. You must manually restart NIOS after selecting this check box for the support to be successful.

        Note

        The allowed and blocked listing feature allows you to specify all possible top-level domains, (for example, linkedin.com, linkedin.co.uk) for well-known names. If a dotless name such as "facebook" is in the allowed list or blocked list and the qname is facebook.<suffix>, then:

        • If the suffix is a top-level domain (example "xxxyyy"), the two are matched regardless of whether "xxxyyy" is registered or not in the worldwide DNS.
          Example: 
          facebook == facebook.com

          facebook == facebook.xxxyyy
        • If the suffix is not a top-level domain (example "xxx.yyy"), whether the two are matched or not depends on whether "xxx.yyy" is registered and present in the public_suffix_list.dat on the appliance or not.
          Example:
          facebook == facebook.co.uk
          facebook != facebook.xxx.yyy
    4. You can enter or edit information in the Extensible Attributes tab, as described in Managing Extensible Attributes.
    5. You can export subscriber site data into a CSV file by selecting the Export option. For more information, see Importing and Exporting Data using CSV Import.
  3. Save the configuration.

Limitations of Enabling DNS Cache Acceleration Subscriber

  • DNS Cache Acceleration subscriber feature is applicable on vDCA and the features are available but not supported on ib-4030.
  • DNS Cache Acceleration subscriber feature supports only unknown bit and do not support unknown policy (AVP).
  • DNS Cache Acceleration processes the guests behind Customer Premises Equipment (CPEs) by bind.
  • You need to reboot the application when there is a configuration change.
  • You cannot log any query without DNSTAP.
  • Blocked domains from bind are not cached at DNS Cache Acceleration as DNS Cache Acceleration uses only category information for the resolved domains.
  • Subscriber at vDCA has only the Primary MSP IP address.
  • DNS Cache Acceleration subscriber feature supports only 16 Additional Blocking Policies.
  • For a domain, an Opt-In subscriber has to resolve a domain normally before blocking another Opt-In subscriber at DNS Cache Acceleration.
  • Proxy-All responses are answered from DNS Cache Acceleration for the clients connected to MSP. If the clients are disconnected, then first few requests are sent to bind and subsequent requests are responded by DNS Cache Acceleration. 

    Note

    MSP closes TCP idle connections every 20 seconds.

  • For the subscriber allowed and blocked list the query name should have a known TLD (top-level domain) and must end with a ‘.’ , in case of any prefixes.
  • The subscriber allowed and blocked list supports only domain names and do not support any wild cards and services.

For Information on Upgrading Parental Control at DNS Cache Acceleration , see Upgrading Parental Control at DNS Cache Acceleration .

Deleting Subscriber Sites

To delete a subscriber site, complete the following:

  1. From the Data Management tab -> DNS tab -> Subscriber Services Deployment tab -> Subscriber Sites tab, click the Action icon next to the subscriber site name and select Delete from the menu.
  2. In the Delete Confirmation (Subscriber Site) dialog box, click Yes.

Viewing Subscriber Sites

To view subscriber sites, complete the following:

  1. From the Data Management tab -> DNS tab -> Subscriber Services Deployment tab -> Subscriber Sites tab.
  2. Grid Manager displays the following information for each subscriber site:
    1. Actions: Click the Action icon next to a selected subscriber site and choose from the following:
      1. Edit: Modify certain general properties.
      2. Delete: You can delete the subscriber site.
      3. Extensible Attributes: Add or modify extensible attributes.
      4. View NAS Gateway Message Rates: Displays the message rates of the NAS gateways configured for the subscriber site. 
    2. Name: The name of the subscriber site.
    3. Comment: Information about the subscriber site.
    4. Site: Displays values that were entered for this predefined attribute.

You can also perform the following:

  • Edit the subscriber site information.
    • Select the subscriber site, and then click the Edit icon.
  • Delete a subscriber site.
    • Select the subscriber site, and then click the Delete icon.
  • Export the list of subscriber sites.
    • Click the Export icon.
  • Print the list of subscriber sites.
    • Click the Print icon.
  • Use filters and the Go to function to narrow down the list. With the autocomplete feature, you can just enter the first few characters of an object name in the Go to field and select the object from the possible matches.
  • Create a quick filter to save frequently used filter criteria:
    • In the filter section, click Show Filter and define filter criteria for the quick filter.
    • Click Save and complete the configuration In the Save Quick Filter dialog box.
  • The appliance adds the quick filter to the quick filter drop-down list in the panel. Note that global filters are prefixed with [G], local filters with [L], and system filters with [S].
  • Sort the subscriber sites in ascending or descending order by column.

Viewing NAS Gateway Message Rates

You can view the NAS gateways (accounting log servers) configured for the subscriber site and the message rate for each NAS gateway.

To view the NAS gateway message rates, complete the following:

  1. From the Data Management tab -> DNS tab -> Subscriber Services Deployment tab -> Subscriber Sites tab.
  2. On the Subscriber Sites tab, click the Action icon next to the respective subscriber site and select View NAS Gateway Message Rates from the list.
  3. The NAS Gateway Message Rates dialog box displays the following information for the selected subscriber site:
    • Name: The name of the NAS gateway.
    • IP Address: The IP address of the NAS gateway.
    • Message Rate: The message rate of the NAS gateway.


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