To install ntp, run the following command in macOS terminal (Applications->Utilities->Terminal)
sudo port install ntp
To see what files were installed by ntp, run:
port contents ntp
To later upgrade ntp, run:
sudo port selfupdate && sudo port upgrade ntp
Reporting an issue on MacPorts Trac
The MacPorts Project uses a system called Trac to file tickets to report bugs and enhancement requests.
Though anyone may search Trac for tickets, you must have a GitHub account in order to login to Trac to create tickets.