logwatch.conf - ( /etc/logwatch/conf/logwatch.conf ) - can contain the local configuration options. The list of valid settings and their default values are in /usr/share/logwatch/default.conf/logwatch.conf.
ignore.conf - ( /etc/logwatch/conf/ignore.conf ) is the list of regular expressions. The set of logs described by this set is ignored by logwatch.
override.conf - ( /etc/logwatch/conf/override.conf ) contains the settings which overrides the standard configuration of specific log files or services. The syntax is the same as in log/service files.
/etc/logwatch/conf/logwatch.conf /etc/logwatch/conf/ignore.conf /etc/logwatch/conf/override.conf /usr/share/logwatch/default.conf/logwatch.conf
The man pages ignore.conf(5) and override.conf(5) are aliases of logwatch.conf(5).