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New Digital Certificates for Juniper Firewall running Deep Inspection (DI) Service



Article ID: KB10239 KB Last Updated: 11 Aug 2010Version: 9.0
Juniper Firewall devices running DI will require a one time manual update of the digital certificates in order to obtain DI signature file updates after Jan 29, 2008 OR upgrade the Juniper Firewall to ScreenOS 6.0.0r4 or 5.4.0r9.
Juniper Firewall devices (SSG, ISG, and NetScreen) that have the Deep Inspection (DI) feature enabled use a preinstalled digital certificate to authenticate to the Deep Inspection signature file update server.  In versions below ScreenOS 6.0.0r4 and ScreenOS 5.4.0r9, this certificate expired on January 29, 2008.  Without operator intervention, after expiration the firewall device will no longer be able to obtain signature file updates.  When trying to update the DI database the download will fail and the following error is displayed:   "Download failed.Error: Unable to est. TCP connection Attack download failed."

How does one determine if this applies to their firewall? 

If the firewall is running one of the following ScreenOS versions, then no action is required to update the digital certificates:
  • ScreenOS 5.4.0r9 or later
  • ScreenOS 6.0.0r4 or later
  • ScreenOS 6.1.0r1 or later
If the ScreenOS is not updated to the above versions, check if the DI license key is loaded on the firewall:
- From the CLI, enter the command 'get license' and look for the license key named 'di_db_key'
- From the WebUI, select Configuration > Update > ScreenOS/Keys, and look for the license key named 'di_db_key' in the License Information box.
If the DI license key is loaded, then the process in the Solution below should be followed.


A.  Upgrade the Juniper Firewall to ScreenOS 6.0.0r4 (or later).


B.  Upgrade the Juniper Firewall to ScreenOS 5.4.0r9 (or later).


C.  Perform the following steps:
  1. Download, unzip, and extract the files in It contains two (2) certificate files: 

  2. Perform the installation instructions in the Product Support Notification (PSN):

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