In these days, using SSL layer at website is the most popular. Because, it's save, reliable and cannot be attacked by virus easily. Ok, I'll describe how to configure SSL in IIS 6. Create certificate First of all, open your Internet Service Manager (ISM) or Internet Information Services (IIS) Manager.
Double click on your sever, and expand all websites configured in your Server.
Open one website and click properties on it. And click on Directory Security tab, then click on Server Certificate.
At that time, Web Server Certificate Wizard box will appear, and then click Next. Then, choose Create a new certificate. Then, click next. And, give your certificate name in textbox, and then click next again.
And, type your organization name and unit. Then, type the common name for your site. And, choose Country, State and City.
And, choose the directory where you want to save your certificate file. Then, click next, and click on finish button. Install the certificate and set up an SSL Web site Open the IIS, and expand websites configured at your server. Click on the website, you want to install certificate.
Click the Directory Security tab. Under Secure Communications, click Server Certificate. This starts the Certificate Installation Wizard. Click Next to continue.
Select Process the pending request and install the certificate and click Next.
Type the location of the certificate that you downloaded in the "Issue and download a certificate" section, then click Next. The Wizard displays the Certificate Summary. Verify that the information is correct, then click Next to continue.
Click Finish to complete the process.
Configure and test On the Website, type 443 on SSL Port.
On the Directory Security tab, under Secure Communications, note that there are now three available options. To set the Web site to require secure connections, click Edit. The Secure Communications dialog box appears.
Select Require Secure Channel (SSL) and click OK.
Click Apply and then OK to close the property sheet. Surf your site Access the site through HTTP by typing http://localhost/yoursite/ in the browser. You receive an error message that resembles the following:
HTTP 403.4 - Forbidden: SSL required.
Try to browse to the same Web page using a secured connection (HTTPS) by typing https://localhost/yoursite in the browser. You may receive a security alert that states that the certificate is not from a trusted root CA. Click Yes to continue to the Web page. If the page appears, you have successfully installed your certificate.
Big Credit : http://support.microsoft.com/kb/299875