Once ntpd has successfully talked to the configured servers and considers the clock as _synced_, it will never mark the clock _unsynced_ if the servers go away.
Here's a corresponding bug report for OpenNTPD on FreeBSD... https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=221282 ... but it's easily reproducible on OpenBSD, too. -- Christian "naddy" Weisgerber [email protected]
