Dell SonicWall SRA 4200 Administrator's Manual page 251

You can also revert back to using the global settings for the signature group to which this
signature belongs without losing the configuration details of existing exclusions.
On the Web Application Firewall > Settings page, global settings must be set to either Prevent
All or Detect All for the Signature Group to which the specific signature belongs. If neither is
set, that Signature Group is globally disabled and cannot be modified on a per-signature basis.
See "Enabling Web Application Firewall and Configuring General Settings" on page
See the following sections:
"Enabling Performance Optimization" on page 252
•
"Configuring Signature Based Custom Handling and Exclusions" on page 252
•
"Reverting a Signature to Global Settings" on page 254
•
"Removing a Host from a Per-Signature Exclusion" on page 254
•
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242.