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

