[dns-operations] rndc problems

[Kevin C.]

Hello,

Can you tell me why this rndc run failed?
# rndc reload
rndc: connection to remote host closed
This may indicate that
* the remote server is using an older version of the command protocol,
* this host is not authorized to connect,
* the clocks are not synchronized, or
* the key is invalid.

Thanks.

Their versions,

rndc:
Version: 9.7.3

named:
BIND 9.7.3