Hi! I encounter this issue when using Firefox to access tomcat (that is using openssl) with client cert authentication. After a certain timeout, the web application does not "see" the clients certificate in requests. The problem happens on different operating systems (Window,s Linux) and browsers. I reported it to tomcat and Firefox, with not much response. There is a simple test case in comment 1 of the tomcat bug (see below). Could someone assist in finding the cause of the problem? I also have pcap traces (somewhere) of working and non working network traffic. Latest tested configuration: tomcat 8.0.30, using OpenSSL 1.0.1m 19 Mar 2015 Firefox 43.0.4 OS: Windows 7 Pro SP1 64bit The tomcat bug with much details: https://bz.apache.org/bugzilla/show_bug.cgi?id=58244 Firefox bug report (not much details): https://bugzilla.mozilla.org/show_bug.cgi?id=1231406 Regards, David Bala?ic