Network Time Protocol (NTP) configuration 900 Network Time Protocol (NTP) server ipv4 IP address of NTP server ipv6 IPv6 address of NTP server hostname Fully qualified domain name of NTP server Marks the server as unused Associate with a number of remote servers Marks the server as preferred Specify NTP clients allowed to access the server IP address ipv4 Allowed IPv4 address ipv4net Allowed IPv4 prefix ipv6 Allowed IPv6 address ipv6net Allowed IPv6 prefix #include #include #include