I had configured apache2 + ssl. How to get client certificate by servlet? If I configured tomcat4.x + ssl, I can get client certificate by servlet. Code: java.security.cert.X509Certificate[] certs; certs = (java.security.cert.X509Certificate[])request.getAttribute("javax.servle t.request.X509Certificate"); Please tell me, why? I want know how to get client certificate by servlet when I configured apache2 + ssl Thanks! zhangwei