Accessing a Kerberized UI Firefox

To access a Kerberos-protected UI, Firefox must be configured to pass Kerberos credentials to the appropriate KDC (Key Distribution Center). Ensure you have the following prerequisites on your local machine:

• krb5.conf (Kerberos configuration file)
• Necessary keytab and principal for authentication

Follow these steps to configure Firefox:

• Open Firefox Configuration:
  • In the Firefox address bar, type about:config and press Enter.
  • Accept any warning messages, if prompted.
• Filter for Kerberos Settings:
  • In the search field, type negotiate to filter the configuration list.
• Set Trusted URIs:
  • Double-click on network.negotiate-auth.trusted-uris to open the dialog box.
  • Enter the domain(s) for which Kerberos authentication must be used (e.g., .example.com).

• Restart Firefox:
  • After setting the trusted URIs, restart Firefox.
• Authenticate with Kerberos:
  • Run kinit with the necessary keytab and principal.

kinit -kt example.keytab example@EXAMPLE.COM

Once authenticated, Firefox sends the Kerberos credentials to the domain specified, allowing access to the Kerberos-protected UI.