This column displays the current effective selection options of the source,
which can be different from the configured options due to the authentication
selection mode (configured by the
-<<chrony.conf.adoc#authselmode,*authselmode*>> directive). The symbols are the
-same as in the *COpts* column.
+<<chrony.conf.adoc#authselectmode,*authselectmode*>> directive). The symbols
+are the same as in the *COpts* column.
*Last*:::
This column displays how long ago was the last measurement of the source made
when the selection was performed.
the unauthenticated servers to override the authenticated servers in the source
selection. Since `chrony` version 4.0, the selection options are enabled in
such a case automatically. This behaviour can be disabled or modified by the
-`authselmode` directive.
+`authselectmode` directive.
An example of a client configuration limiting the impact of the attacks could
be