Hi Matthias. This is the output that we get when we tried to connect to prediction (port 995) via openssl: verify error:num=20:unable to get local issuer certificate verify return:1 verify error:num=27:certificate not trusted verify return:1 verify error:num=21:unable to verify the first certificate verify return:1 We have setup a cert_file with the three certificates: ---Begin Certificate--- our certificate ---End Certificate--- ---Begin Certificate--- intermediate certificate ---End Certificate--- ---Begin Certificate--- root certificate ---End Certificate--- Also we test using ssl_ca_chain file, and ssl_ca_path and nothing works. Every test produces the same errors. Thx for your help.