Error code: sec_error_unknown_issuer Solution Valid SSL Certificate Throwing Error in Firefox

So you've just purchased your SSL cert, renewed it and installed it or maybe you've had it installed and working fine all the time with all other browsers but you've upgraded to a recent version of Firefox and suddenly get the warning "Error code: sec_error_unknown_issuer" error.

This is terrible since if you bought an SSL cert, you are most likely using it for trust purposes for your business and obviously that message will scare away most potential customers.

The Easy Solution

You need the CA Certificate Bundle which even threw me off because  I've always just used the .crt/certificate file issued for the domain and the .key/private key file and things have always worked.

Find the CA Chain file that is also provided by your SSL provider and add it to your configuration.  In Apache this means adding a line like this to your Apache Vhost/Control Panel

SSLCACertificateFile /etc/ssl-certs/RapidSSL_CA_bundle.pem

After that just restart Apache and the error will be gone.

This issue is also discussed on:

Comodo's website

RapidSSL's website


Tags:

sec_error_unknown_issuer, valid, ssl, certificate, firefoxso, ve, purchased, cert, renewed, installed, browsers, upgraded, firefox, quot, purposes, ca, bundle, crt, issued, domain, provided, provider, configuration, apache, adding, vhost, panel, sslcacertificatefile, etc, certs, rapidssl_ca_bundle, pem, restart, comodo, website, rapidssl,

Latest Articles

  • Unable to mount location Failed to retrieve share list from server: Connection timed out - Samba/Linux Filesharing Not working Ubuntu Mint Linux Solution
  • How To Resize, Reduce a Video to a Specific Size and Quality Ubuntu Linux using ffmpeg
  • vi how to delete all lines in the file
  • Linux Mint / Ubuntu 20 Intel I219 NIC disconnects
  • Linux can't boot/grub boot loader screen with no options solution
  • EFI PXE grub2 Howto guide for Linux EFI PXE Booting on Debian, Mint, Ubuntu, RHEL
  • Aruba/HP/Dell IAP Wireless Controller Common Default Passwords
  • Debian, Mint Ubuntu how to remove package and associated config files
  • Linux Grub not booting the intended kernel solution in Debian, Mint, Ubuntu how to specify which kernel to boot by default
  • QEMU KVM Keyboard Problems Not Working Right Repeating Characters, Ctrl+C Copy and Paste not working right when using PS2 mouse in guests Solution
  • Linux how to compile binary with static sharedobjects embedded instead of dynamic to use on multi-distributions and avoid glibc compatiblity issues
  • /bin/sh: msgfmt: not found error solution on Linux Compilation Ubuntu Debian Mint Centos
  • Mikrotik RouterOS CHR/ISO Basic and Quick Setup Howto Guide
  • qemu 4 compilation options
  • CentOS 7 8 PXEBoot Netinstall Not Working Solution "Pane is dead "new value non-exisetnt xfs filesystem is not valid as a default fs type"
  • CentOS 6 EOL yum repo won't work Error: Cannot find a valid baseurl for repo: base Solution
  • CentOS 7 8 How To Disable SELinux
  • Wordpress How To Add Featured Image To Post in Hueman Theme
  • kdenlive full reset how to erase all config files
  • CentOS 7 8 yum error Trying other mirror. To address this issue please refer to the below wiki article