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How to bypass blocking of an App Control Advanced signature using Bypass DPI in App Rules

10/14/2021 74 People found this article helpful 124,796 Views

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    Description


    The Bypass DPI action excludes Match Objects from Deep Packet Inspection (DPI) components IPS, GAV, Anti-Spyware and Application Control. This article describes a method to exclude an App Control Advanced signature from being blocked when the signature's parent application group is blocked.

    For the purpose of this article, the signature SID # 8559 - GZIP (HTTP Download) is excluded when its parent application group  - Archive under Category FILE-TYPE-HTTP - is blocked. The reason for choosing this particular SID is because enabling this signature for blocking will block access to most HTTP sites.

    This article assumes that there already exists an App Rules policy blocking FILE-TYPE-HTTP | Archive.


     

    Resolution

    Resolution for SonicOS 7.X

    This release includes significant user interface changes and many new features that are different from the SonicOS 6.5 and earlier firmware. The below resolution is for customers using SonicOS 7.X firmware.




    To bypass the DPI, follow these steps.

    • Navigate to Objects | Match Objects | Match Object.
    • Click on Add.

    Select the below options:

    • Match Object Type: Application Signature List
    • Application Category: FILETYPE-DETECTION(72)
    • Applications:FILETYPE-DETECTION Archive (994)

      Image

    • Under Policy | Rules and Policies | App Rules.
    • Click Add.
    • Create a below rule.

      Image

    • The Rule would be shown in the App rules as shown below in the screenshot:

      Image


    Resolution for SonicOS 6.5

    This release includes significant user interface changes and many new features that are different from the SonicOS 6.2 and earlier firmware. The below resolution is for customers using SonicOS 6.5 firmware.




    To bypass the DPI, follow these steps.

    1. Login to the SonicWall management GUI
    2. Click Manage in the top navigation menu.
    3. Navigate to the Policies | Objects | Match Objects page, click on"Add" and choose "Match Object"

       Image
    4. Create the following Match Object.

      Image


    5. Navigate to the Policies | Rules | Application Control page, click on"Add" and configure the rules as shown in the screenshot

      Image
    6. The Rule would be shown in the App rules as shown below in the screenshot

      Image



    Resolution for SonicOS 6.2 and Below

    The below resolution is for customers using SonicOS 6.2 and earlier firmware. For firewalls that are generation 6 and newer we suggest to upgrade to the latest general release of SonicOS 6.5 firmware.




    Login to the SonicWall management GUI
    Navigate to the Firewall | Match Objects page
    Create the following Match Object.

    Image

    Navigate to the Firewall | App Rules page.
    Create the following App Rules policy. Notice that the Action Object selected is Bypass DPI.

    Image


    Logging :

    When accessing a website, the log message generated will be in the following format, if Log using App Control message format is enabled in the App Rules policy (see screenshot):
    Image 





    Logging :

    When accessing a website, the log message would be generated.

     

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    Categories

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