In addition to the standard Apache directives needed to enable SSL, you'll need a few more before the Apache modules work as they do on scripts. Add the following directives to each vhost that will be using SSL client-side certificate authentication:
SSLVerifyClient require
- <Location />
+ <Location />
AuthSSLCertVar SSL_CLIENT_S_DN_Email
AuthSSLCertStripSuffix "@MIT.EDU"
- </Location>
+ </Location>
You'll also need to enable the Apache modules.