Install Sana Commerce Webshop on Web and Database Server

Step 1: Open the 'web.config' of the Sana Commerce frontend project in any text editor.

Step 2: Locate the 'customErrors' section in the 'system.web' configuration section:

<customErrors mode="RemoteOnly">
    <error statusCode="404" redirect="~/PageNotFound.aspx"/>
    <error statusCode="500" redirect="~/PageError.aspx"/>
</customErrors>

Step 3: Configure the 404 & 500 'statusCodes'. Also, set the mode attribute of the 'customErrors' node to 'RemoteOnly' to make sure the customer 404 & 500 pages are shown to external visitors. Local visitors, who visit through the web browser on the server, will be presented the error messages for debugging reasons. 

Step 1: Open the IIS Manager ('Start > Administrative Tools').

Step 2: Select your website, locate the 'Error Pages' in the IIS 'Features' list and click it.

Step 3: Double click the '404' page.

Step 4: Select 'Execute a URL on this site' and enter '/PageNotFound.aspx' in the 'URL' field.

Step 5: For a 500,100 page, you need to use the 'Add option in the 'Actions' block.

Step 6: Enter '500.100' in the 'Status code' field and '/PageError.aspx' in the 'URL' field: