[Ring] Router port information

[Arlen]

Greetings,

   Can anyone out there advise me on what service and port number I 
would need to allow on a router for Ring?

   My issue is an older router that does not support UPnP. It sounds 
like UPnP is recommended for using Ring.

   Also, there are apparently some security concerns with having UPnP 
enabled, and it would be nice to have an option to set things manually.

   If I am misinformed on the security issues of UPnP, please enlighten me.

Thank you,

Arlen