When run, stunnel complaints about: ========================= 2015.08.24 14:08:23 LOG5[ui]: Compiled with OpenSSL 1.0.2c 12 Jun 2015 2015.08.24 14:08:23 LOG5[ui]: Running with OpenSSL 1.0.2d 9 Jul 2015 ========================= moreover it cannot verify cert (I got) ========================= 2015.08.24 14:08:23 LOG3[ui]: SSL_connect: 14094418: error:14094418:SSL routines:ssl3_read_bytes:tlsv1 alert unknown ca ======================== I have no errors with version: 3:5.06-2 which also complaints about open ssl ======================== 2015.08.24 14:10:39 LOG5[30678]: Compiled with OpenSSL 1.0.1j 15 Oct 2014 2015.08.24 14:10:39 LOG5[30678]: Running with OpenSSL 1.0.2d 9 Jul 2015 ======================== but can connect and verify ca properly. KJ