![]() Free Active Directory Change Auditing Solution.Windows Event Collection: Supercharger Free Edtion.Free Security Log Quick Reference Chart.Inappropriate type of checksum in messageįield is too long for this implementation ![]() Specified version of key is not availableĪlternative authentication method required* Workstation’s clock too far out of sync with the DC’s Integrity check on decrypted field failed Pre-authentication information was invalid Workstation restriction, or Authentication Policy Silo (look for event ID 4820)Īccount disabled, expired, locked out, logon hours. Requested start time is later than end time New computer account has not replicated yet or computer is pre-w2kĪdministrator should reset the password on the account Requested protocol version # not supportedīad user name, or new computer/user account has not replicated to DC yet If the PATYPE is PKINIT, the logon was a smart card logon. This event records that a Kerberos TGT was granted, actual access will not occur until a service ticket is granted, which is audited by Event 673. ![]() Computer generated kerberos events are always identifiable by the $ after the computer account's name. ![]() In these instances, you'll find a computer name in the User Name and fields. Windows logs other instances of event ID 4768 when a computer in the domain needs to authenticate to the DC typically when a workstation boots up or a server restarts. The User ID field provides the SID of the account. Rather look at the Account Information: fields, which identify the user who logged on and the user account's DNS suffix. The User field for this event (and all other events in the Audit account logon event category) doesn't help you determine who the user was the field always reads N/A. If the ticket request fails Windows will either log this event, 4768 or 4771 with failure as the type. If the username and password are correct and the user account passes status and restriction checks, the DC grants the TGT and logs event ID 4768 (authentication ticket granted). This event is logged on domain controllers only and both success and failure instances of this event are logged.Īt the beginning of the day when a user sits down at his or her workstation and enters his domain username and password, the workstation contacts a local DC and requests a TGT. 4768: A Kerberos authentication ticket (TGT) was requested
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