On Mon, Sep 12, 2016 at 05:35:06PM +0300, Andrey Kulikov wrote: > I'm using OpenSSL 1.0.2g > In my client I would like to disable SSL session resumption completely (for > test purposes). The odd thing is that on the client side, nothing in OpenSSL does resumption by default, because OpenSSL does not know which cached sessions might be appropriate for a given new connection. Client-side re-use happens only via SSL_set_session(3). Perhaps your application code is explicitly assigning previous sessions to nascent SSL connections. -- VIktor.