Connection filters are filters that are invoked whenever a client attempts to open a connection to Gallium Data . These are not specific to a database type. Note that this is before login, therefore user names and credentials are not yet available.
The following connection filters are available out of the box:
Connection close filter (this filter is special -- it is called when connections are closed)
All filter types can be supplemented with JavaScript code, so if a filter type doesn't do exactly what you're looking for, you can easily customize its behavior.