Description: A mask indicating the restrictions to apply to the entry. 0x0001 - ignore, Ignore all packets from hosts. 0x0002 - noquery, Ignore all NTP information queries and configuration requests from the source. 0x0004 - nomodify, Ignore all NTP information queries and configuration requests that attempt to modify the state of the server. 0x0008 - notrap, Decline to provide control message trap service to matching hosts. 0x0010 - lowpriotrap, Declare traps set by matching hosts to be low priority. 0x0020 - noserve, Ignore NTP packets other than information queries and config-uration requests. 0x0040 - nopeer, Provide stateless time service to polling hosts, but do not allocate peer memory resources to these hosts even if they otherwise might be considered useful as future synchronization partners. 0x0080 - notrust, Treat these hosts normally in other respects, but never use them as synchronization sources. 0x0100 - limited, These hosts are subject to a limitation of the number of clients from the same net.