Internal Certificate Authority
Download and install the root certificate to trust certificates issued by this CA.
Download Root Certificatesudo cp shepguard-root-ca.crt /usr/local/share/ca-certificates/
sudo update-ca-certificates
sudo security add-trusted-cert -d -r trustRoot -k /Library/Keychains/System.keychain shepguard-root-ca.crt
certutil -addstore -f "ROOT" shepguard-root-ca.crt