Error Code
Error Message
400
Bad request
401.1
Logon failed
401.2
Logon failed due to server configuration
401.3
Unauthorized due to ACL on resource
401.4
Authorization failed by filter
401.5
Authorization failed by ISAPI/CGI application
403.1
Execute access forbidden
403.2
Read access forbidden
403.3
Write access forbidden
403.4
SSL required
403.5
SSL 128 required
403.6
IP address rejected
403.7
Client certificate required
403.8
Site access denied
403.9
Too many users
403.10
Invalid configuration
403.11
Password change
403.12
Mapper denied access
403.13
Client certificate revoked
403.14
Directory listing denied
403.15
Client Access Licenses exceeded
403.16
Client certificate untrusted or invalid
403.17
Client certificate has expired or is not yet valid
404
Not found
404.1
Site not found
405
Method not allowed
406
Not acceptable
407
Proxy authentication required
412
Precondition Failed
414
Request-URI too long
500
Internal server error
500.12
Application restarting
500.13
Server too busy
500.15
Requests for Global.asa not allowed
500-100.asp
ASP error
501
Not implemented
502
Bad gateway
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