###Network Time Protocol Daemon###

Features:  1. Time synchronization  2. multiple sources  3. Support symmetric keys for time sync with other, controlled(trusted), servers  4. Multiple strate are supported in a hierarchy   a. Strate range: 1(most accurate)- 16(least accurate) Note: Most accurate means that the stratum level 1 sever has access to an external clock (GPS, radio, etc.)  5. NTP will NOT set your system's clock if it is skewed (off) by 1000 or more seconds  6. If '-g' invocation option is ued, '1000s' skew is overridden  7. NTP is dynamic in it's calculations; alway adjusting the values surrounding target NTP services Tasks:  1. Explore configuration   a. '/etc/ntpd.conf' - primary config file  2. Start service   a. 'service ntpd start'  3. Query NTPD   a. 'ntpq -np' Note: Clocks labeled at: stratum 16 are considered unreliable Note: NTP uses: UDP:123 for source and destination ports  4. Sync Cisco Router   a. 'sh ntp ass'   b. 'ntp server 192.168.75.21'  5. Sync Windows Server   a. 'rdesktop -a 16 -f 192.168.0.75.105'  6. Sync Debian Server with RedHat Server Note: Configure NTP to sync with 3 or more clocks