Digi Connect IT 4 User Manual page 564

Services
Note This list is synchronized with the list of servers included with NTP client configuration,
and changes made to one will be reflected in the other. See
more information about NTP client configuration.
5. Allow the device's local system clock to be used as backup time source:
(config)> service ntp local true
(config)>
6. (Optional) Configure the access control list to limit downstream access to the Connect IT 4
device's NTP service.
To limit access to specified IPv4 addresses and networks:
n
(config)> add service ntp acl address end value
(config)>
Where value can be:
A single IP address or host name.
l
A network designation in CIDR notation, for example, 192.168.1.0/24.
l
any: No limit to IPv4 addresses that can access the NTP server agent.
l
Repeat this step to list additional IP addresses or networks.
To limit access to specified IPv6 addresses and networks:
n
(config)> add service ntp acl address6 end value
(config)>
Where value can be:
A single IP address or host name.
l
A network designation in CIDR notation, for example, 2001:db8::/48.
l
any: No limit to IPv6 addresses that can access the NTP server agent.
l
Repeat this step to list additional IP addresses or networks.
To limit access to hosts connected through a specified interface on the Connect IT 4
n
device:
(config)> add service ntp acl interface end value
(config)>
Where value is an interface defined on your device.
Digi Connect IT® 4 User Guide
Display a list of available interfaces:
Use ... network interface ? to display interface information:
(config)> ... network interface ?
Interfaces
Additional Configuration
-------------------------------------------
Network Time Protocol
Configure the system time for
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