> On Mar 21, 2019, at 2:14 AM, Hal Murray <hmurray@xxxxxxxxxxxxxxx> wrote: > >> Can I set any flags while building openssl 1.1.1 to disable TLS 1.3 or can >> i get any package from ubuntu to disable TLS 1.3 ? > > You can do it at run time using SSL_set_max_proto_version It can also be set in the system-wide default openssl.cnf file. -- Viktor.