17832

Product

Name

Event ID

17832

Event Source

MSSQLSERVER

Component

SQLEngine

Symbolic

Name

SRV_BAD_LOGIN_PKT

Message Text

The login packet used to open the connection is structurally invalid; the connection has

been closed. Please contact the vendor of the client library.%.*ls

The SQL Server computer was unable to process the client login packet. This may be because

the packet was created improperly or because the packet was damaged during transmission. It

can also be caused by the configuration of the SQL Server computer. The IP address listed is

the address of the client computer. This error can occur for both Windows and SQL logins.

When using Windows Authentication in a Kerberos environment, a client receives a Kerberos

ticket that contains a Privilege Attribute Certificate (PAC). The PAC contains various types of

authorization data including groups that the user is a member of, rights the user has, and what

policies apply to the user. When the client receives the Kerberos ticket, the information

contained in the PAC is used to generate the user’s access token. The client presents the token

to the SQL Server computer as part of the login packet.

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