How do you troubleshoot Kerberos authentication issues?
How do you troubleshoot Kerberos authentication issues?
So, how can we reproduce the problem?
- Get a command prompt as the “SYSTEM” and attempt to access the remote system.
- Start the network capture utility.
- Clear all name resolution cache as well as all cached Kerberos tickets.
- Now you need to run a command that will require authentication to the target server.
What is Kinit Kerberos?
kinit is used to obtain and cache Kerberos ticket-granting tickets. This tool is similar in functionality to the kinit tool that are commonly found in other Kerberos implementations, such as SEAM and MIT Reference implementations.
How do I know if Kerberos authentication is working?
You can view the list of active Kerberos tickets to see if there is one for the service of interest, e.g. by running klist.exe. There’s also a way to log Kerberos events if you hack the registry. You should really be auditing logon events, whether the computer is a server or workstation.
How do I stop Kerberos authentication?
Disabling Kerberos authentication
- Log on to the host on which you want to disable Kerberos authentication.
- Edit ego. conf at EGO_CONFDIR to remove the EGO_AUTH_PLUGIN parameter. When you disable Kerberos, the message-integrity check is also disabled.
How long does Kinit last?
You can separately specify how long your ticket will last before expiring, and how long it could last if you renew it before that expiration, with “kinit -l lifetime -r renewable_life”, but note that the maximum is 9 hours for lifetime and 7 days for renewable life, and our defaults will already request these maximum …
What happens when Kinit?
Description. The kinit command obtains or renews a Kerberos ticket-granting ticket. The Key Distribution Center (KDC) options specified by the [kdcdefault] and [realms] in the Kerberos configuration file (kdc. conf) are used if you do not specify a ticket flag on the command line.
How do I know if my Kerberos authentication is working?
What is Kerberos target resolution error?
A Kerberos error occurs because the Kerberos TGS cannot find the target server. Explicit credentials must be used to manage the target server. Right-click the target server in the Servers tile of the All Servers page, and then click Manage As to provide explicit credentials.
How to track Kerberos pre-authentication failure 4771?
For 4771 (F): Kerberos pre-authentication failed. You can track all 4771 events where the Client Address is not from your internal IP range or not from private IP ranges. If you know that Account Name should be used only from known list of IP addresses, track all Client Address values for this Account Name in 4771 events.
How do I enable Kerberos authentication in SQL Server?
Ensure Kerberos has been initialized on the client with ‘kinit’ and a Service Principal Name has been registered for the SQL Server to allow Kerberos authentication. ErrorCode=InternalError, Exception=Interop+NetSecurityNative+GssApiException: GSSAPI operation failed with error – Unspecified GSS failure.
What are the different types of pre-authentication in Kerberos?
Kerberos Pre-Authentication types. Logon without Pre-Authentication. This type is normal for standard password authentication. The ETYPE-INFO pre-authentication type is sent by the KDC in a KRB-ERROR indicating a requirement for additional pre-authentication.
Can I use Kinit -K for NFSv4 Kerberos mounts?
I use ktpass on a windows domain controller and transferred the keytab. kinit -k works fine and I can use it for nfsv4 Kerberos mounts. This is all pretty standard. My problem is I have a customer that installed 6.7 with a base install and we cannot get kinit to work correctly. We set these RPMs.
