HTTP 403.x Errors

List of IIS 403 Errors

Error Code	Description
403.1	Execute access forbidden. The appropriate level of the Execute permission is not granted. For more information about how to resolve this problem, click the following article number to view the article in the Microsoft Knowledge Base: 942065 - Error message when you visit a website that is hosted on IIS 7.0: “HTTP Error 403.1 – Forbidden”
403.2	Read access forbidden. The appropriate level of the Read permission is not granted. Verify that you have set up IIS 7.0, IIS 7.5, and IIS 8.0 to grant the Read permission to the directory. Additionally, if you use a default document, verify that the default document exists. For more information, click the following article number to view the article in the Microsoft Knowledge Base: 942036 - Error message when you visit a website that is hosted on IIS 7.0: “HTTP Error 403.2 – Forbidden”
403.3	Write access forbidden. The appropriate level of the Write permission is not granted. Verify that the IIS 7.0, IIS 7.5, and IIS 8.0 permissions and the NTFS file system permissions are set up to grant the Write permission to the directory. For more information, click the following article number to view the article in the Microsoft Knowledge Base: 942035 - Error message when you visit a website that is hosted on IIS 7.0: “HTTP Error 403.3 – Forbidden”
403.4	SSL required. The request is made over a nonsecure channel, and the web application requires a Secure Sockets Layer (SSL) connection. For more information, click the following article number to view the article in the Microsoft Knowledge Base: 942070 - Error message when you visit a website that is hosted on IIS 7.0: “HTTP Error 403.4 – Forbidden”
403.5	SSL 128 required. The server is configured to require a 128-bit SSL connection. But, the request is not sent by using 128-bit encryption. For more information, click the following article number to view the article in the Microsoft Knowledge Base: 942069 - Error message when you try to browse a webpage that is hosted on IIS 7.0: “HTTP Error 403.5 – Forbidden”
403.6	IP address rejected. The server is configured to deny access to the current IP address. For more information, click the following article number to view the article in the Microsoft Knowledge Base: 942068 - Error message when you visit a website that is hosted on IIS 7.0: “HTTP Error 403.6 – IP Address Rejected”
403.7	Client certificate required. The server is configured to require a certificate for client authentication. But, the client browser does not have an appropriate client certificate installed. For more information, click the following article number to view the article in the Microsoft Knowledge Base: 942067 - Error message when you try to run a web application that is hosted on a server that is running IIS 7.0: “HTTP Error 403.7 – Forbidden”
403.8	Site access denied. The server is configured to deny requests based on the Domain Name System (DNS) name of the client computer. For more information, click the following article number to view the article in the Microsoft Knowledge Base: 942066 - Error message when you visit a website that is hosted on IIS 7.0: “HTTP Error 403.8 – Forbidden”
403.12	Mapper denied access. The page that you want to access requires a client certificate. But, the user ID that is mapped to the client certificate is denied access to the file. For more information, click the following article number to view the article in the Microsoft Knowledge Base: 942064 - Error message when you visit a website that is hosted on IIS 7.0: “HTTP Error 403.12 – Client Certificate Denied”
403.13	Client certificate revoked. The client browser tries to use a client certificate that was revoked by the issuing certification authority. For more information, click the following article number to view the article in the Microsoft Knowledge Base: 942063 - Error message when you visit a website that is hosted on IIS 7.0: “HTTP Error 403.13 – Forbidden”
403.14	Directory listing denied. The server is not configured to display a content directory listing, and a default document is not set. For more information, click the following article number to view the article in the Microsoft Knowledge Base: 942062 - Error message when you visit a website that is hosted on IIS 7.0: “HTTP Error 403.14 – Forbidden”
403.16	Client certificate is untrusted or invalid. The client browser tries to use a client certificate that is not trusted by the server that is running IIS 7.0, IIS 7.5, or IIS 8.0 or that is not valid. For more information, click the following article number to view the article in the Microsoft Knowledge Base: 942061 - Error message when you visit a website that is hosted on IIS 7.0: “HTTP Error 403.16 – Forbidden”
403.17	Client certificate has expired or is not yet valid. The client browser tries to use a client certificate that is expired or that is not yet valid. For more information, click the following article number to view the article in the Microsoft Knowledge Base: 942038 - Error message when you try to visit a webpage that is hosted on Internet Information Services 7.0: “HTTP Error 403.17 (Forbidden) – The client certificate has expired”
403.18	Cannot execute requested URL in the current application pool. A custom error page is configured, and the custom error page resides in a different application pool than the application pool of the requested URL. For more information, click the following article number to view the article in the Microsoft Knowledge Base: 942037 - Error message when you visit a website that is hosted on IIS 7.0: “HTTP Error 403.18 – Forbidden”
403.19	Cannot execute CGI applications for the client browser in this application pool. The identity of the application pool does not have the Replace a process level token user right. For more information, click the following article number to view the article in the Microsoft Knowledge Base: 942048 - Error message when you visit a website that is hosted on IIS 7.0: “HTTP Error 403.19 – Forbidden”