Pogoplug will likely work with this equipment but the provider and plan your friend selects is more important.
The plan needs to provide a real IP address, not a proxied address which puts your friends network behind another router on the provider's network.
Other than that, we use http and https used by all websites and UDP ports for routing data traffic, both inbound and outbound.
As long as the provider's plan satisfies all above and assuming the network is fast with relatively low latency, Pogoplug should work.
Hope that helps.