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Configure Gateway AV Decompression Settings

Gateway AV can scan inside compressed files if you enable decompression in the Gateway AV configuration settings.

To configure decompression settings, from Fireware Web UI:

  1. Select Subscription Services > Gateway AV.
    The Gateway AV configuration page appears.
  2. Click Settings.
    The Gateway AV Global Settings page appears.

Screen shot of the Gatweay AV Global Settings - enable decompression check box

  1. To scan inside compressed attachments, select the Enable Decompression check box. Select or type the number of compression levels to scan. If you enable decompression, we recommend that you keep the default setting of three levels, unless your organization must use a larger value. If you specify a larger number, your Firebox could send traffic too slowly. Gateway AntiVirus supports up to six levels. If Gateway AntiVirus detects that the archive depth is greater than the value set in this field, it will generate a scan error for the content.
    Compressed attachments that cannot be scanned include encrypted files or files that use a type of compression that we do not support such as password-protected Zip files. To set the action for the Firebox when it finds a message it cannot scan, select an action for When a scan error occurs in the General category of the policy configuration.
  2. Click Restore Defaults if you want to reset the user interface to default settings.
  3. Save the configuration.

To configure decompression settings, from Policy Manager:

  1. Select Subscription Services > Gateway AntiVirus > Configure.
    The Gateway AntiVirus dialog box appears.
  2. From the Gateway AntiVirus dialog box, click Settings.
    The Gateway AV Decompression Settings dialog box appears.

Screen shot of the Gateway AntiVirus Decompression dialog box

  1. To scan inside compressed attachments, select the Enable Decompression check box. Select or type the number of compression levels to scan. If you enable decompression, we recommend that you keep the default setting of three levels, unless your organization must use a larger value. If you specify a larger number, your Firebox could send traffic too slowly. Gateway AntiVirus supports up to six levels. If Gateway AntiVirus detects that the archive depth is greater than the value set in this field, it will generate a scan error for the content.
    Compressed attachments that cannot be scanned include encrypted files or files that use a type of compression that we do not support such as password-protected Zip files. To set the action for the Firebox when it finds a message it cannot scan, select an action for When a scan error occurs in the General category of the policy configuration.
  2. Click Restore Defaults if you want to reset the user interface to default settings.
  3. Save the configuration.

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