Configuring Fiddler Everywhere on Fedora, CentOS, or RedHat


Product Version 1.0.0 and above
3rd-party tool Shared System Certificates storage
Supported OS Fedora, CentOS, RedHat, and others


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?


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

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