How to run pure-ftpd with port range as a service

I am running pure-ftpd on raspbian, I need to pass it parameters to specify the port range for data connections, I read the following page here pure-ftpd faq it mentions that I can run the process directly like below.. Example: /usr/local/sbin/pure-ftpd -p 50000:50400 I believe the way to start and stop the services is as below sudo service pure-ftpd start How can I pass it parameters ?