Hi, We have an application where user can authenticate himself with Client certificate. SSL and certificate authentication is done by IIS 6. The problem is that after auth is successful I don't get client certificate in servlet. request.getAttribute("javax.servlet.request.X509Certificate") returns null The same application with same configuration works ok on IIS 5(old production box) and IIS 5.1 (development) I have tried with various versions of JK and JK2 and same result, doesn't work in IIS 6. I have tried to run IIS in IIS 5 isolation mode and without, and results are same. Everything else seems to work but getting certificate. version of Jboss is 4.0.3SP1 Does anyone else has problem with this? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3985457#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...