Create NTPv4 Restrict Entries

Before you begin

You must enable NTPv4 server master mode. For more information, see Configure NTP Globally.

About this task

Perform the following procedure to configure the NTP restrict capability for a specific IPv4 or IPv6 address(es), which means the switch permits traffic flow from the specified IP address only. By default the NTP restrict capability is disabled.

Note

Note

  • You can configure a maximum of 128 NTP Restrict entries (IPv4 or IPv6 addresses).

  • 0.0.0.0/0 or ::/0 NTP restrict entries are equivalent to no NTP restrict rules configured.

Procedure

  1. In the navigation pane, expand Configuration > Edit > NTP.
  2. Select Restrict.
  3. Select the Restrict Info tab.
  4. Select Insert.
  5. In RowIndex, type a value.
  6. Select the IP address type.
  7. Type the IPv4 or IPv6 address.
  8. Type the restrict mask value.
  9. Select Insert.

Restrict Info Field Descriptions

Use data in the following table to use the Restrict Info tab.

Name

Description

RowIndex

Specifies the NTP Restrict entry.

AddressType

Specifies the NTP Restrict address type.

RestrictAddress

Specifies the NTP address to be restricted.

RestrictMask

Specifies the prefix length of the IPv4 or IPv6 NTP address to be restricted.
9037809-01 Rev AA