> Yup, however I would suggest that methods like this https://github.com/yandex/ClickHouse/blob/master/dbms/src/Access/AllowedClientHosts.cpp#L154 could be merged into one line.    > And especially the empty ones https://github.com/yandex/ClickHouse/blob/master/dbms/src/Access/AllowedClientHosts.cpp#L138    It is a matter of taste. I found them Ok.