hi khav, try adding the following lines to your nginx website configuration file: ssl_stapling on; ssl_stapling_verify on; ssl_trusted_certificate /etc/nginx/my_ssl_certs/ca-bundle.pem; # # note the PEM encoded X509 ca-bundle file should contain the ssl certificate # chain bundle (i.e. domain and intermediate CA certs) # resolver 8.8.8.8 8.8.4.4 valid=3by ionsec - Nginx Mailing List - English