NTPtrack

NTPtrack is a professional monitoring tool for Network Time Protocol servers. It polls any number of servers in parallel, decodes every field of each reply and turns the results into valuable data for time and network engineers. PRECISION DASHBOARD • Large clock corrected by the measured offset, with millisecond and microsecond digits • Second bar that resets exactly on the true second boundary • Device offset to the reference server and to the consensus of all servers • One card per server with state, time source, stratum, offset, delay, jitter and sparkline EVERY PROTOCOL DETAIL • NTPv3 and NTPv4 client queries, plus NTS (RFC 8915) with key exchange and authenticated replies • Optional mode 6 control queries: system peer, clock jitter, wander, frequency, TAI offset • Leap indicator, stratum, poll, precision, root delay, root dispersion, reference ID and all four timestamps • Reference clock badges decoded from the reference ID: GPS, GNSS, PZF, DCF77, PPS, IRIG, PTP and more • Raw packet inspector with hex dump MEASUREMENT YOU CAN TRUST • Kernel receive timestamps where the system provides them • RFC 5905 clock filter, Marzullo consensus and falseticker detection • Server-to-server comparison that cancels the local clock error • Jitter, wander, frequency estimate, standard deviation, Allan and modified Allan deviation COMPARE AND SYNCMON • Synchronized time-series charts from live to 30 days, with symmetric log axis and ±1σ bands • N×N offset matrix, statistics table, histograms and Allan deviation plot • SyncMon view on a logarithmic scale from 1 ns to 1 s, sortable by offset, deviation or name • Topology mode with the reference in the centre TIME SERVER APPLIANCES • Reads reference type, oscillator, satellites, antenna state, PZF correlation and leap second announcements from Meinberg LANTIME devices via their REST API and SNMP ALERTS AND HISTORY • Thresholds for offset, delay, jitter, loss and stratum changes, with optional notifications • Event log for state changes, reference changes, leap announcements, kiss codes, steps and DNS changes • 30 days of local history, CSV and JSON export, server list import and export NTPtrack never polls public pools faster than every 64 seconds, honours kiss-o'-death codes and keeps credentials in the Keychain only. No analytics, no tracking!