Configuring Fiddler Everywhere on Fedora, CentOS, or RedHat

Environment

Description

The instructions for installing the trusted root certificate for Fiddler Everywhere on Linux use the Debian dpkg-reconfigure command. However, some Linux distributions like Fedora, CentOS, and RedHat can lack the dpkg library or limit its usage. How can I install and trust the Fiddler root CA (certificate authority) using the update-ca-trust command?

Solution

1. Install and open the Fiddler Everywhere application on a shared system certificate storage Linux distribution such as Fedora, CentOS, or RedHat.
2. Export the Fiddler Everywhere root certificate through Settings > HTTPS > Advanced Settings > Export root certificate(DER/Binary format). The CA is exported to ~/Desktop as a file named Fiddler_Root_Certificate_Authority.crt.
3. Open a terminal and copy the exported CA to the shared certificate storage. The following example uses the default paths on Fedora 33.

cp ~/Desktop/Fiddler_Root_Certificate_Authority /etc/pki/ca-trust/source/anchors/

1. Trust the certificate by updating the certificate authority through the following terminal command:

update-ca-trust

1. Return to Fiddler Everywhere and enable the HTTPS capturing by selecting the Settings > HTTPS > Capture HTTPS traffic checkbox.