A.3. Troubleshooting Firefox Kerberos Configuration
A.3. Troubleshooting Firefox Kerberos Configuration If Kerberos authentication is not working, turn on verbose logging for the authentication process. Close all instances of Firefox. In a command prompt, export values for the NSPR_LOG_* variables: Restart Firefox from that shell , and visit the website where Kerberos authentication is failing. Check the /tmp/moz.log file for error messages with nsNegotiateAuth in the message. There are several common errors that occur with Kerberos authentication. No credentials found This means that no Kerberos tickets are available (meaning that they expired or were not generated). To fix this, run kinit to generate the Kerberos ticket, and then open the website again. Server not found in Kerberos database This means that the browser is unable to contact the KDC. This is usually a Kerberos configuration problem. The correct entries must be in the [domain_realm] section of the /etc/krb5.conf file to identify the domain. For example: No errors are present in the log An HTTP proxy server could be stripping off the HTTP headers required for Kerberos authentication. Try to connect to the site using HTTPS, which allows the request to pass through unmodified.
export NSPR_LOG_MODULES=negotiateauth:5 export NSPR_LOG_FILE=/tmp/moz.log -1208550944[90039d0]: entering nsNegotiateAuth::GetNextToken() -1208550944[90039d0]: gss_init_sec_context() failed: Miscellaneous failure No credentials cache found -1208994096[8d683d8]: entering nsAuthGSSAPI::GetNextToken() -1208994096[8d683d8]: gss_init_sec_context() failed: Miscellaneous failure Server not found in Kerberos database .example.com = EXAMPLE.COM example.com = EXAMPLE.COM