How to use DPI SSL enforcement to distribute DPI SSL certificate?

06/08/2020 68 People found this article helpful 476,128 Views

Description

When you enable the DPI-SSL services on your SonicWall network security appliance, the clients behind the firewalls that have no related certificates are often required to confirm by going through HTTPS web pages. Otherwise, users have to install the corresponding DPI-SSL certificates manually if they want to bypass this step, by downloading the corresponding certificate, and then installing it.
To simplify the procedure so that clients can download and install the certificates automatically, DPI-SSL enforcement is necessary.

Resolution

NOTE: DPI SSL enforcement is a licensed service and is automatically activated if Capture Client is licensed on the firewall. The count remains the same as per the node count of Capture Client endpoints. DPI SSL enforcement is done with the help of the Capture Client.

Navigate to MANAGE | Security Services | DPI SSL enforcement tab to configure this section.

This enforcement can also be done on a zone level similar to Client AV and Client CF enforcement.

You can click on the Network > Zones link on the DPI SSL enforcement tab.
It takes you to MANAGE | System Setup | Network | Zones.
Click on the edit button for the zone you would like to enforec it on.
Enable the checkbox for 'Enable DPI SSL Enforcement Service'.

When the devices present behind this zone try to go online, they will be asked to install the Capture Client if they do not have the DPI SSL certificate installed.

It is best to use the 'DPI-SSL Enforcement List' and 'Excluded from DPI-SSL Enforcement List' to make sure that this is not enforced on unnecessary end machines like phones, printers etc. The DPI-SSL Enforcement section contains the lists of addresses included in and excluded from DPI-SSL enforcement.

To add IP addresses to either of these lists, you can click on the '+' icon next to it.
It opens an option to add either host/range of IP addresses.
Add the necessary IP or range of IP addresses and click on OK.

When a non-complaint endpoint (a machine that does not have the DPI SSL certificate installed) tries to go online, the following message shows up.

Once you click on install, Capture Client is installed which in turn installs the DPI SSL certificate on the end client as per the policy that gets applied from CMC.