NIST NTP servers

Harlan Stenn stenn at
Thu May 12 03:04:07 UTC 2016

Sharon Goldberg writes:
> Well, if you really want to learn about the NTP servers a target is using
> you can always just sent them a regular NTP timing query (mode 3) and just
> read off the IP address in the reference ID field of the response (mode 4).

Unless the server is an IPv6 server.  This trick only works for IPv4.

And we have a fix for all of this that will be out soon.
Harlan Stenn <stenn at> - be a member!

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