Digi IX20 - Page 757

Services Network Time Protocol
IX20 User Guide
757
3. Click Services> NTP.
4. Enable the IX20 device'sNTPservice by clicking Enable.
5. (Optional) Configure the access control list to limit downstream access to the IX20 device's
NTPservice.
n
To limit access to specified IPv4 addresses and networks:
a. Click IPv4 Addresses.
b. For Add Address, click .
c. For Address, enter the IPv4 addressor network that can accessthe device's NTP
service. Allowed values are:
l
Asingle IPaddress or host name.
l
Anetwork designation in CIDRnotation, for example, 192.168.1.0/24.
l
any: No limit to IPv4 addresses that can access the NTPservice.
d. Click  again to list additional IPaddresses or networks.
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To limit access to specified IPv6 addresses and networks:
a. Click IPv6 Addresses.
b. For Add Address, click .
c. For Address, enter the IPv6 addressor network that can accessthe device's NTP
service. Allowed values are:
l
Asingle IPaddress or host name.
l
Anetwork designation in CIDRnotation, for example, 2001:db8::/48.
l
any: No limit to IPv6 addresses that can access the NTPservice.
d. Click  again to list additional IPaddresses or networks.
n
To limit access to hosts connected through a specified interface on the IX20 device:
a. Click Interfaces.
b. For Add Interface, click .
c. For Interface, select the appropriate interface from the dropdown.
d. Click  again to allow accessthrough additional interfaces.
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To limit access based on firewall zones:
a. Click Zones.
b. For Add Zone, click .
c. For Zone, select the appropriate firewall zonefrom the dropdown.
See Firewall configuration for information about firewall zones.
d. Click  again to allow accessthrough additional firewall zones.