openssl genrsa -out checkmk.mydomain.com.key 4096
openssl req -new -key checkmk.mydomain.com.key -out checkmk.mydomain.com.csr
openssl x509 -in checkmk.mydomain.com.csr -out checkmk.mydomain.com.crt -req -signkey checkmk.mydomain.com.key -days 365