Dear All, I have been facing this particular issue for quite sometime now and don’t know what exactly is causing this. The issue is with client certificate authentication. We have noticed that for few users, client certificate authentication fails – i.e. browser prompts for client certificate in a popup window and after I choose the appropriate personal certificate and submit, it then immediately shows me IE’s “Page cannot be found” error. This happened both for IE7 and IE8 on Windows 7 but it is not consistent – meaning this error comes only to specific end users. For most of them it seems to work but not few. This is a public site with proper certificates installed which were procured from VeriSign. In the ssl error log, I see this error: [Mon Sep 10 17:42:08 2012] [error] [client xx.xx.xx.xx] Re-negotiation handshake failed: Not accepted by client!?, referer: https://xxx.xxx.com/LoginForms/login.jsp [Mon Sep 10 17:42:08 2012] [error] [client xx.xx.xx.xx] Re-negotiation request failed, referer: https://xxx.xx.com/LoginForms/login.jsp [Mon Sep 10 17:42:08 2012] [error] SSL Library Error: 336126196 error:1408E0F4:SSL routines:SSL3_GET_MESSAGE:unexpected message I tried to search on the internet but was unsuccessful. Any ideas or pointers on where this issue could be? We tried to duplicate this on our TEST environment, but we couldn’t reproduce it. The environment is same across TEST and PROD. Our environment: OS: RHEL 6.3 Apache: Server version: Apache/2.2.15 (Unix) Server built: Feb 7 2012 09:50:11 Mod_SSL: Mod SSL - 2.2.15-15.el6_2.1.i686 OpenSSL: OpenSSL 1.0.0-fips 29 Mar 2010 Thank you in advance, VP --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx