You can manage local RPZ, including FireEye integrated RPZ rules that you defined earlier and modify their information. You can do the following:
- View RPZ rules, as described in Viewing RPZ Rules.
Modify RPZ rules, as described in Modifying RPZ Rules.
You cannot modify the rules of an RPZ feed. However, you can override the entire ruleset or each rule using local RPZs.
- Delete RPZ rules, as described in Deleting RPZ Rules.
- Copy RPZ rules, as described in Copying RPZ Rules.
- Import RPZ rules, as described in Importing RPZ Rules.
- Disable NSDNAME and NSIP rules for RPZ zones, as described in Disabling NSDNAME and NSIP rules for RPZ zones.
Viewing RPZ Rules
You can view and edit the rules that are defined for each local RPZ, including FireEye integrated RPZs. To view RPZ rules:
- From the Data Management tab -> DNS tab -> Response Policy Zones tab -> click the RPZ link.
- You can view the following:
- Name or Address: Displays the domain name or the IP address on which the rule is defined.
- Policy: Displays the rule applied on the domain name or the IP address.
- Data: Displays the target data of the rule.
- Comment: Displays the comment specified when the rule is defined.
- Disabled: Displays Yes if the RPZ rule is disabled. Otherwise, this field displays No.
- Site: Displays an extensible attribute, Site.
- Expiration: Displays the expiration time for the corresponding FireEye integrated RPZ rule. Note that NIOS updates the expiration time when you change the lifetime of the FireEye integrated RPZ rule, or if the last updated time of the rule changes, or if the alert type that generates the rule changes. This time is estimated based on the following:
Expiration Time = Lifetime of an alert type + Last updated time of the rule
NIOS runs a scheduler every 10 minutes to identify FireEye integrated RPZ rules whose expiration time is less than the current time. If there are rules whose expiration time is less than the current time, then such rules will be deleted. NIOS logs all deletion activities in the syslog. You can view the syslog to verify expired rules. For more information, see Viewing RPZ in the Syslog.
- Fire Eye Alert Type: Displays the type of FireEye alert.
- Last Updated: Displays the time when the RPZ rule was last updated.
The columns, Expiration, FireEyeAlertType, and LastUpdated, are displayed only for FireEye integrated RPZ rules. These columns are not displayed for non-FireEye RPZ rules.
You can also do the following:
- Use Quick Filter 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. For information, see Using Quick Filters.
- Modify some of the data in the table. Double click a row of data, and either edit the data in the field or select an item from a drop-down list. You can edit Comments and Extensible Attributes. Note that some fields are read-only. For more information about this feature, see Modifying Data in Tables.
- To export the list of RPZ rules to a .csv file, click the Export icon. For information on the export options, see Importing and Exporting Data using CSV Import
- Click the Print icon to print the list of RPZ rules. For more information, see .
Modifying RPZ Rules
You can modify the name of a local or FireEye integrated RPZ rule, IP address, network address, substituted name, and the comment recorded for the corresponding rule. You can also update the TTL settings or the extensible attributes that are associated with an RPZ rule.
To modify RPZ rules:
- From the Data Management tab -> DNS tab -> Response Policy Zones tab -> click the RPZ link -> Name or Address check box, and then click the Edit icon.
- The RPZ rules editor provides the following tabs from which you can modify data:
- In the General tab, you can change the information you previously entered through the wizard. For more information, see Configuring Rules for RPZs.
- You can also enter or edit information in the TTL and Extensible Attributes tabs. For information about TTL settings, see Specifying Time To Live Settings. For information about extensible attributes, see Managing Extensible Attributes.
- Save the configuration.
Deleting RPZ Rules
You can delete local RPZ rules, including FireEye integrated RPZ rules, or schedule them for deletion for a later date. When you remove an RPZ rule, the NIOS appliance moves it to the Recycle Bin, if enabled.
To delete RPZ rules:
- From the Data Management tab, select the DNS tab -> Response Policy Zones tab -> Response Policy Zone -> Ruleset.
- To delete an RPZ rule immediately, click the Delete icon, and then click Yes to confirm the delete request. To schedule the deletion, click Schedule Deletion and in the Schedule Change panel, enter a date, time, and time zone. For information, see Scheduling Deletions.
Grid Manager moves the RPZ rule to the Recycle Bin, from which you can restore or permanently delete it.
Copying RPZ Rules
You can copy rules from one local RPZ to another local RPZ or from one FireEye integrated RPZ to another FireEye RPZ. You can also copy rules from a local RPZ to a FireEye integrated RPZ or vice-versa. Different views of the same RPZ may have a number of rules in common. If this is the case, you can copy rules between views and zones.
To copy RPZs between DNS zones and views:
- From the Data Management tab, select the DNS tab -> Response Policy Zones tab, click Copy Rules from the Toolbar.
- In the Copy Rules dialog box, Grid Manager displays the last selected zone or the zone from which you are copying rules in the Source field. The following fields are displayed:
- Source: Grid Manager displays the last selected zone or the zone from which you are copying rules. It also displays the associated DNS view.
- Destination: Click Select Zone to select the destination zone. When there are multiple zones, Grid Manager displays the Zone Selector dialog box from which you can select one. After you select the zone, Grid Manager displays the associated DNS view.
- Copy All Rules: Select this option to copy all the rules.
- Copy Specific Rules: Select this option to copy specific rules only. Select a rule from the Available column and click the right arrow to move it to the Selected column.
- Copy Options: Select one of the following:
- Delete all rules in the destination before copying the rules: Select to delete all rules in the destination zone before the records are copied.
- Overwrite existing rules: Select to overwrite existing rules that have the same domain name owners as the rules being copied.
3. Click Copy & Close.
Importing RPZ Rules
You can import rules from an RPZ zone to a local zone. To import, you must enable zone transfer on the external server. The rules of the existing zone are overwritten when you import rules from an external server.
To import RPZ rules:
- From the Data Management tab, select the DNS tab -> Response Policy Zones tab -> click the RPZ link in the Name column -> Rules, click Import Zone from the Toolbar.
- In the Import Zone dialog box, the following fields are displayed:
- Zone: The RPZ that you have selected is displayed.
- DNS View: The DNS view that you have selected is displayed.
- Address: Enter the address of the external server from where you want to import rules.
- Click Import.
Disabling NSDNAME and NSIP rules for RPZ zones
NSDNAME and NSIP rules are enabled for RPZ zones by default. You can disable or enable NSDNAME and NSIP rules to control the validation of NS records and glue records received by upstream DNS servers. When you enable RPZ on internal DNS servers and if there are forward-mapping zones that are not reachable from external networks, NSDNAME and NSIP validation is not necessary. In this case, you can disable NSDNAME and NSIP rules to reduce delays in responses. When you disable these rules for RPZ zones, the appliance bypasses NSDNAME and NSIP validation for the queries and it significantly improves the performance. Note that this setting disables both NSDNAME and NSIP rules at the same time for both internal and external RPZ zones. This setting only affects the lookup process but the zone data remains unchanged. NSDNAME and NSIP records will still be available in RPZ zones during zone transfers (AXFR and IXFR). If you disable NSDNAME and NSIP rules for RPZ zones at the Grid level, all members inherit this setting. You can override this setting for each member.
Disabling NSDNAME and NSIP rules for RPZ zones on members which may send recursive queries to external servers, results in reduced security. Accordingly, it is not recommended to disable these rules for RPZ zones on members that respond with data from external servers.
To disable NSDNAME and NSIP rules for RPZ zones:
- Grid: From the Data Management tab, select the DNS tab, expand the Toolbar and click Grid DNS Properties.
Member: From the Data Management tab, select the DNS tab, click the Members tab -> member check box -> Edit icon.
- In the Grid DNS Properties or Member DNS Properties editor, click the General tab -> Advanced tab and complete the following.
- Disable NSDNAME and NSIP rules for RPZ zones: This check box is deselected and NSDNAME and NSIP rules are enabled for RPZ zones by default. Select this check box to disable NSDNAME and NSIP rules for all RPZ zones. To override the value inherited from the Grid, click Override. To retain the same value as the Grid, click Inherit.
3. Save the configuration and click Restart if it appears at the top of the screen.
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