X-Git-Url: https://sipb.mit.edu/gitweb.cgi/wiki.git/blobdiff_plain/fbb8f5a056816075ddc8e93383c1179b917750f1..783ee506486d724d5335db95ca60ce6ab63845fc:/doc/apache-client-certs.mdwn?ds=sidebyside

diff --git a/doc/apache-client-certs.mdwn b/doc/apache-client-certs.mdwn
index da598d5..6a5311e 100644
--- a/doc/apache-client-certs.mdwn
+++ b/doc/apache-client-certs.mdwn
@@ -4,7 +4,7 @@ While it's certainly possible to configure client-side certificate authenticatio
 
 ## Installing the modules
 
-If you're using Ubuntu, [Evan Broder](http://ebroder.net) has packaged the scripts.mit.edu modules for all current Ubuntu releases in a PPA.
+If you're using Ubuntu, Evan Broder has packaged the scripts.mit.edu modules for all current Ubuntu releases in a PPA.
 
 The [PPA homepage](https://launchpad.net/~broder/+archive/scripts-http-mods) includes instructions on how to install the PPA on your system, but if you're on Ubuntu Karmic or later, you can just run:
 
@@ -20,12 +20,14 @@ You'll also need a working AFS client and the Athena client certificate CA. Both
 
 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
+    SSLCACertificateFile /etc/ssl/certs/mitCAclient.pem
     <Location />
         AuthSSLCertVar SSL_CLIENT_S_DN_Email
         AuthSSLCertStripSuffix "@MIT.EDU"
     </Location>
 
+You also need to require certificate authentication. You can either use `SSLVerifyClient require` or `SSLVerifyClient optional`. `SSLVerifyClient require` has the downside that, if visitors don't have client-side certificates, they'll get an obscure OpenSSL error. However, Safari will not present certificates to a site with `SSLVerifyClient optional` set unless the user sets up an Identity Preference. For reference, scripts.mit.edu sets `SSLVerifyClient optional`.
+
 You'll also need to enable the Apache modules.
 
     # a2enmod auth_sslcert