Excluding ranges from discovery

Your network might have some IP devices that you never want to be scanned, or that you want to exclude from a scan at a scheduled time. For example, you might have some legacy applications that will run only on old hardware and might be regarded as fragile. You can add such a device as a single IP exclude, or as an exclude range.

To add an Exclude Range

You can add the following types of exclude ranges:

  • Permanent
  • Scheduled

To add a permanent exclude range

  1. From the main menu, select Manage > Discovery
    The Discovery page opens.
  2. Click Add New Exclude.
  3. Enter the information for the exclude range in the fields, using the following table as a guide.

    Field name

    Details

    Range

    Enter IP address information in one of the following formats:
    • IPv4 address (for example 192.168.1.100). Labelled v4.
    • IPv6 address (for example 2001:500:100:1187:203:baff:fe44:91a0). Labelled v6.
    • IPv4 range (for example 192.168.1.100-105, 192.168.1.100/24, or 192.168.1.*). Labelled v4.
    As you enter text, the UI divides it into pills (discrete editable units) when you enter a space or a comma. According to the text entered, the pill is formatted to represent one of the previous types or presented as invalid.

    (info) Pills are not supported in Opera.

    Label

    Enter a label for the discovery run. Where the discovery run is referred to in the UI, this label is shown.

    Description

    A free-text description of the exclude range.

  4. Click OK.
    The Excluded Ranges tab is displayed with the new exclusion.

To add a scheduled exclude range

  1. From the main menu, select Manage > Discovery
    The Discovery page opens.
  2. Click Add New Exclude.
  3. Enter the information for the exclude range in the fields, using the following table as a guideField name

     

    Details

    Range

    Enter IP address information in one of the following formats:
    • IPv4 address (for example 192.168.1.100). Labelled v4.
    • IPv6 address (for example 2001:500:100:1187:203:baff:fe44:91a0). Labelled v6.
    • IPv4 range (for example 192.168.1.100-105, 192.168.1.100/24, or 192.168.1.*). Labelled v4.

    Large scheduled exclude ranges

    If you specify a scheduled exclude range that blocks 65535 IP addresses or more of a scan range, new IP addresses from that scan are not added to the scan queue until at least one of the blocked IP addresses is allowed to scan.

    As you enter text, the UI divides it into pills (discrete editable units) when you enter a space or a comma. According to the text entered, the pill is formatted to represent one of the previous types or presented as invalid.

    (info) Pills are not supported in Opera.

    Label

    Enter a label for the discovery run. Where the discovery run is referred to in the UI, this label is shown.

    Description

    A free-text description of the exclude range.

    Frequency

    Add text.

    Start

    Based on the selected frequency of the scheduled exclude, you are presented with the following start options:
    • Weekly by days of week—You are provided with buttons for each day and drop-down menus for the start time in hours and minutes. You can select one or more days from the day buttons.
    • Once per week—You are provided with drop-down menus to select the day of the week and the start time in hours and minutes.
    • Monthly by day of month—You are provided with drop-down menus to select the day of the month and the start time in hours and minutes.
    • Monthly by week of month—You are provided with drop-down menus to the select the week, the day of the week, and the start time in hours and minutes.

    For example, to start a scheduled weekly exclude which starts on Friday at 19:30 hrs and continues until Saturday, do the following:

    1. Select the exclude frequency as Weekly by days of week.
    2. Click the F and S day buttons.
    3. From the time drop-down menu, select 19 hours and 30 minutes.

    End

    Based on the selected frequency of the scheduled exclude, you are presented with the following end options:
    Weekly by days of week—You are provided with the drop-down menus to select the end time in hours and minutes.
    Once per week—You are provided with the drop-down menus to select the day of the week and time to end a scheduled exclude.
    Monthly by day of month—You are provided with menus to select the day of the month and time to end a scheduled exclude.
    Monthly by week of month—You are provided with the drop-down menus to the select the number of days and the time within which a scheduled exclude must end.

    For example, to end a scheduled weekly exclude which starts on Friday at 19:30 hrs and continues until 21 hours 30 minutes on Saturday (see the example for the Start field in the previous row), you will select 21 hours and 30 minutes from the time drop-down menu.

To edit an existing exclude range

You can edit an existing exclude range. If the exclude range is currently in progress, it is automatically canceled when you edit it.

  1. From the Exclude Ranges tab of the Discovery Status page, click the exclude range that you want to edit.
    All of the fields are editable.
  2. Make the required changes and click OK.

To enable or disable an exclude range

You can enable or disable an existing exclude range, whether it is permanent or scheduled.

From the Exclude Ranges tab of the Discovery Status page, select individual, multiple, or all exclude ranges to enable or disable. If the exclude range is in progress, it is canceled if you make and apply any changes.

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