kerberos error

The error event 675 with 0X19 error code indicates:

0x19 - KDC_ERR_PREAUTH_REQUIRED: Additional pre-authentication required

In domain environment, Kerberos is the default authentication protocol. In
Kerberos Authentication protocol implemented in Windows, Pre-authentication
is required by default. However, sometimes, clients may not include the
pre-authentication data in first communication with KDC (the AS_REQ). As a
result, KDC returns an error to inform client that Pre-Authentication
is required, and then an event ID 675 with the error 0x19 is recorded on
KDC.

Meanwhile, please set the flag "Do not require pre-authentication" for the
problematic account EXC$, to configure the system to not require
pre-authentication. For user accounts, we can enable this flag in User
Properties. For computer account, we should modify the attribute
UserAccountControl via the following steps:

1. On the domain controller, click Start, click Run, type in "adsiedit.msc"
(without the quotation marks) and press ENTER to launch ADSI Edit tool.
This tool is included with the Windows 2003 Support Tools. To install the
Support Tools, run Suptools.msi from the Support\Tools folder on the
Windows 2003 Server CD-ROM.
2. Locate the computer accounts DOMAIN\EXC$ under the Domain partition.
3. Right-click on "DOMAIN\EXC$", click Properties.
4. Then locate the attribute "UserAccountControl" in the Attributes list.
Click Edit.
5. Modify the value to original value plus 4194304. For example, if the
original value is 512, the new value should be 512+4194304=4194816
6. Click OK, click Apply, and click OK.
7. Quit ADSI Edit. Then you can check if the event 675 stops for these
accounts.

For more information about UserAccountControl attribute, you can refer to
the following article:

How to use the UserAccountControl flags to manipulate user account
properties

http://support.microsoft.com/kb/305144

Security Log Events That Might Contain Kerberos Error Codes

Event ID

Account Logon Event Type

Event Information Potentially Associated with Kerberos Authentication

672

■	Success audit (Windows 2000 and Windows Server 2003)
■	Failure audit (Windows Server 2003)

Authentication Ticket Request:

■	User Name
■	Supplied Realm Name
■	User ID
■	Service Name
■	Service ID
■	Ticket Options
■	Result Code: Kerberos error code
■	Ticket Encryption Type
■	Pre-Authentication Type
■	Client Address
■	Certificate Issuer Name
■	Certificate Serial Number
■	Certificate Thumbprint

673

■	Success audit (Windows 2000 and Windows Server 2003)
■	Failure audit (Windows Server 2003)

Service Ticket Request:

■	User Name
■	User Domain
■	Service Name
■	Service ID
■	Ticket Options
■	Ticket Encryption Type
■	Client Address
■	Failure Code: Kerberos Error Code
■	Logon GUID
■	Transited Services

675

■	Failure audit

Pre-authentication Failed:

■	User Name
■	User ID
■	Service Name
■	Pre-authentication Type
■	Failure Code: Kerberos error code
■	Client Address

676

■	Failure audit (Obsolete in Windows Server 2003; both success and failure audits use event ID 672.)

Authentication Ticket Request Failed:

■	User Name
■	Supplied Realm Name
■	Service Name
■	Ticket Options
■	Failure Code: Kerberos error code
■	Client Address

677

■	Failure audit (Obsolete in Windows Server 2003; both success and failure audits use event ID 673.)

Service Ticket Request Failed:

■	User Name
■	User Domain
■	Service Name
■	Ticket Options
■	Failure Code: Kerberos error code
■	Client Address

Kerberos V5 Authentication Protocol Error Messages Generated by Windows Server 2003

Kerberos Error Number	Kerberos Error Code	Description
0x3	KDC_ERR_BAD_PVNO	Requested protocol version number not supported.
0x6	KDC_ERR_C_PRINCIPAL_UNKNOWN	Client not found in Kerberos database.
0x7	KDC_ERR_S_PRINCIPAL_UNKNOWN	Server not found in Kerberos database.
0x8	KDC_ERR_PRINCIPAL_NOT_UNIQUE	Multiple principal entries in database.
0xA	KDC_ERR_CANNOT_POSTDATE	Ticket not eligible for postdating.
0xB	KDC_ERR_NEVER_VALID	Requested start time is later than end time.
0xC	KDC_ERR_POLICY	KDC policy rejects request.
0xD	KDC_ERR_BADOPTION	KDC cannot accommodate requested option.
0xE	KDC_ERR_ETYPE_NOSUPP	KDC has no support for encryption type.
0xF	KDC_ERR_SUMTYPE_NOSUPP	KDC has no support for checksum type.
0x10	KDC_ERR_PADATA_TYPE_NOSUPP	KDC has no support for pre-authentication data type.
0x12	KDC_ERR_CLIENT_REVOKED	Client€™s credentials have been revoked.
0x17	KDC_ERR_KEY_EXPIRED	Password has expired - change password to reset.
0x18	KDC_ERR_PREAUTH_FAILED	Pre-authentication information was invalid.
0x19	KDC_ERR_PREAUTH_REQUIRED	Additional pre-authentication required.
0x1B	KDC_ERR_MUST_USE_USER2USER	Server principal valid for user-to-user only.
0x1C	KDC_ERR_PATH_NOT_ACCPETED	KDC Policy rejects transited path.
0x1D	KDC_ERR_SVC_UNAVAILABLE	A service is not available.
0x1F	KRB_AP_ERR_BAD_INTEGRITY	Integrity check on decrypted field failed.
0x20	KRB_AP_ERR_TKT_EXPIRED	Ticket expired.
0x21	KRB_AP_ERR_TKT_NYV	Ticket not yet valid.
0x22	KRB_AP_ERR_REPEAT	Request is a replay.
0x23	KRB_AP_ERR_NOT_US	The ticket isn€™t for us.
0x24	KRB_AP_ERR_BADMATCH	Ticket and authenticator do not match.
0x25	KRB_AP_ERR_SKEW	Clock skew too great.
0x28	KRB_AP_ERR_MSG_TYPE	Invalid message type.
0x29	KRB_AP_ERR_MODIFIED	Message stream modified.
0x34	KRB_ERR_RESPONSE_TOO_BIG	Response too big for UDP, retry with TCP.
0x3C	KRB_ERR_GENERIC	Generic error (description in e-text).
0x44	KDC_ERR_WRONG_REALM	User-to-user TGT issued different KDC.

kerberos error event ID 675 with 0x19 error code