NTP Server Lookup Tool

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Discover local NTP servers via DNS SRV records and format them for inclusion in a NTP config file.

Creating DNS SRV Records

To create DNS SRV records for NTP, add entries in your domains DNS server. Here some example SRV records:

_ntp._udp.example.com. 3600 IN SRV 1 10 123 ntp1.example.com.
_ntp._udp.example.com. 3600 IN SRV 2 10 123 ntp2.example.com.
_ntp._udp.example.com. 3600 IN SRV 3 10 123 ntp3.example.com.

In this example, the weight of all three records is 10 and the port is 123.

Special Values

If the priority equals 1, the NTP server entry will have `iburst` appended.
If the weight equals 0, the NTP server will have `prefer` appended.
If the weight equals 100, the NTP server will have `noselect` appended.