Running Apache on a CentOS self-administered server (ie, I have ssh access). After suitable configuration changes to httpd/conf.d/ssl.conf, my new LE certificate is recognized and accepted by Apache HTTPS. It is recognized by wget, but not accepted.
# wget -v -O - https://blackdog.straight8.com/admin --2019-02-05 10:59:51-- https://blackdog.straight8.com/admin Resolving blackdog.straight8.com... 18.104.22.168 Connecting to blackdog.straight8.com|22.214.171.124|:443... connected. ERROR: cannot verify blackdog.straight8.com's certificate, issued by `/C=US/O=Let\'s Encrypt/CN=Let\'s Encrypt Authority X3': Unable to locally verify the issuer's authority. To connect to blackdog.straight8.com insecurely, use `--no-check-certificate'.
Is there some further configuration I have to employ?