Technical Tip: How to solve the navigation slowness issue when Firewall profile is enabled with FortiClient 7.4.4+

Inspecting QUIC traffic can impact browser performance. Consider adjusting inspection settings disabling QUIC protocol for performance improvement.

To disable the QUIC protocol for endpoints using FortiClient EMS, follow these steps:

Steps to block QUIC protocol.

1. Access Endpoint Profiles:

Log in to FortiClient EMS.
Navigate to Endpoint Profiles.

2. Edit firewall profile:

Go to Firewall settings. Select the desired profile and select Edit.

3. Application Overrides:

Within the firewall profile, find the Application Overrides section.
Select Add to create a new application override.

4. Filter Application Name:

In the filter options, search for QUIC.
Ensure that the category is set to Network.Service.

5. Set the Action to Block:

Set the action for QUIC to Block.
Select Add and then Save to apply the changes.

6. Apply the Firewall Profile:

Ensure that the modified firewall profile is applied to the relevant endpoint policy.
This will ensure that the changes take effect on the endpoints.

By following these steps, the QUIC protocol will be blocked, forcing browsers to revert to standard TCP-based protocols, allowing the Web Filter to manage traffic effectively.