Event submitted by Event Log Doctor
Event ID:
36887
Source:
SChannel

Message:
The following fatal alert was received: 42.






Solution by Event Log Doctor

2015-01-22 16:30:03 UTC

SChannel is a Windows SSP (Security Support Provider), similar to Kerberos and NTLM.

SChannel provides SSL/TLS communication through the SSPI (Security Support Provider Interface) for applications like Internet Explorer, IIS, SQL Management Studio and many more.

Schannel event logging can be controlled through the registry, and by default logs only "Errors" (http://support.microsoft.com/kb/260729).

On workstations, Schannel errors can usually be ignored.

Common error codes depicted in Schannel events are as follows:

TLS1_ALERT_CLOSE_NOTIFY (0)
TLS1_ALERT_UNEXPECTED_MESSAGE (10)
TLS1_ALERT_BAD_RECORD_MAC (20)
TLS1_ALERT_DECRYPTION_FAILED (21)
TLS1_ALERT_RECORD_OVERFLOW (22)
TLS1_ALERT_DECOMPRESSION_FAIL (30)
TLS1_ALERT_HANDSHAKE_FAILURE (40)
TLS1_ALERT_BAD_CERTIFICATE (42)
TLS1_ALERT_UNSUPPORTED_CERT (43)
TLS1_ALERT_CERTIFICATE_REVOKED (44)
TLS1_ALERT_CERTIFICATE_EXPIRED (45)
TLS1_ALERT_CERTIFICATE_UNKNOWN (46)
TLS1_ALERT_ILLEGAL_PARAMETER (47)
TLS1_ALERT_UNKNOWN_CA (48)
TLS1_ALERT_ACCESS_DENIED (49)
TLS1_ALERT_DECODE_ERROR (50)
TLS1_ALERT_DECRYPT_ERROR (51)
TLS1_ALERT_EXPORT_RESTRICTION (60)
TLS1_ALERT_PROTOCOL_VERSION (70)
TLS1_ALERT_INSUFFIENT_SECURITY (71)
TLS1_ALERT_INTERNAL_ERROR (80)
TLS1_ALERT_USER_CANCELED (90)
TLS1_ALERT_NO_RENEGOTIATION (100)
TLS1_ALERT_UNSUPPORTED_EXT (110)



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