Cisco Cisco Email Security Appliance C160 Mode D'Emploi

9-78

Cisco AsyncOS 8.0.2 for Email User Guide

Chapter 9 Using Message Filters to Enforce Email Policies

Using the CLI to Manage Message Filters

Activating and Deactivating a Message Filter

A given message filter is either active or inactive and it is also either valid or invalid. A message filter
is only used for processing if it is both active and valid. You change an existing filter from active to
inactive (and back again) via the CLI. A filter is invalid if it refers to a listener or interface which does
not exist (or has been removed).

Note

You can determine if a filter is inactive by its syntax; AsyncOS changes the colon after the filter name
to an exclamation point for inactive filters. If you use this syntax when entering or importing a filter,
AsyncOS marks the filter as inactive.

For example, the following benign filter named “filterstatus” is entered. It is then made inactive using
the

filter -> set

subcommand. Note that when the details of the filter are shown, the colon has been

changed to an exclamation point (and is bold in the following example).

mail3.example.com> filters

Choose the operation you want to perform:

- NEW - Create a new filter.

- IMPORT - Import a filter script from a file.

[]> new

Enter filter script. Enter '.' on its own line to end.

filterstatus: if true{skip-filters();}

1 filters added.

Choose the operation you want to perform:

- NEW - Create a new filter.

- DELETE - Remove a filter.

- IMPORT - Import a filter script from a file.

- EXPORT - Export filters to a file

- MOVE - Move a filter to a different position.

- SET - Set a filter attribute.

- LIST - List the filters.