DOCUMENT:Q239875 02-JUL-2002 [iis] TITLE :HOW TO: Use ASP to Force SSL for Specific Pages PRODUCT :Internet Information Server PROD/VER::4.0,5.0 OPER/SYS: KEYWORDS:kbHOWTOmaster ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Internet Information Server version 4.0 - Microsoft Internet Information Services version 5.0 ------------------------------------------------------------------------------- IN THIS TASK ------------ - SUMMARY - Prerequisites - Forcing SSL using ASP - REFERENCES SUMMARY ======= It is frequently good security practice to require Secure Sockets Layer (SSL) for certain pages on a Web site. Although this can be configured through the Internet Services Manager (ISM) in the Microsoft Management Console (MMC), you can also use Active Server Pages (ASP) to force SSL for specific pages without making changes in the MMC. Prerequisites ------------- This article assumes the following conditions: - IIS is running on standard ports: - HTTP = Port 80 - HTTPS = Port 443 - IIS has a valid SSL certificate installed. - The Web site or virtual server that is used does not use HTTP/1.1 host headers for name resolution. Forcing SSL using ASP --------------------- To force SSL using ASP, follow these steps: 1. Click Start, click Run, type "Notepad" (without the quotation marks), and then click OK. 2. Paste the following code into a blank Notepad document. On the File menu, click Save As, and then save the following code in the root of your Web server as an include file named ForceSSL.inc: <% If Request.ServerVariables("SERVER_PORT")=80 Then Dim strSecureURL strSecureURL = "https://" strSecureURL = strSecureURL & Request.ServerVariables("SERVER_NAME") strSecureURL = strSecureURL & Request.ServerVariables("URL") Response.Redirect strSecureURL End If %> 3. For each page that requires SSL, paste the following code at the top of the page to reference the include file from the previous step: <%@Language="VBSCRIPT"%> When each page is browsed, the ASP code that is contained in the include file detects the port to determine if HTTP is used. If HTTP is used, the browser will be redirected to the same page by using HTTPS. REFERENCES ========== For additional information about this topic, click the article numbers below to view the articles in the Microsoft Knowledge Base: Q171084 How to Install a Certificate Q187504 HTTP 1.1 Host Headers Are Not Supported When You Use SSL Q218445 How to Configure Certificate Server for Use with SSL on IIS Q228991 How to Create and Install an SSL Certificate in Internet Information Server 4.0 Q228836 Installing a New Certificate with Certificate Wizard for Use in SSL/TLS Q257591 Description of the Secure Sockets Layer (SSL) Handshake Additional query words: ====================================================================== Keywords : kbHOWTOmaster Technology : kbiisSearch kbiis500 kbiis400 Version : :4.0,5.0 Issue type : kbhowto ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2002.