What is the Parallel's IP address range of its cloud servers for Access?

I've opened 19294 & 19295 TCP & UDP, plus 19302 UDP, all in both directions to all my DHCP users. The product works great, but I shouldn't have to accept traffic on these ports from anywhere except Parallel's Access servers, right? I don't want any device on the Internet to come through these ports, just those that are going through Parallels cloud servers since they're the ones that the iPad accesses & they also cache my desktop content. I've searched, but can't find an IP address range for these servers in any of the documentation. We don't want to set up our own server, just use theirs for a few individuals.

 

Hello JimMac,
Please follow http://kb.parallels.com/117017 for more info about necessary Network port for Parallels Access.