It is strongly recommended that you configure your web portal with a security certificate, so players can connect securely using HTTPS instead of HTTP. Some browsers will issue security warnings if a website is not on HTTPS, which can turn away players. CertBot comes pre-installed in the default Ares installation; you just need to set it up for your domain.
Reboot the server. See Rebooting the Server.
Security certificates expire after 90 days. If all went well with your install, CertBot should automatically renew your certificates when they expire. If you get a security warning saying that your certificate is invalid when viewing the web portal, you may need to reboot the server so that the game and web portal recognize the renewed certificate.
bin/devstart command to run the game in dev mode will not work if HTTPS is enabled. Instead you must run the start command manually:
bundle exec rake startares
This feature only applies to the web portal. Ares does not currently support a SSL connection through standard MU clients.