Solar Edge Inverter Hughes Modem Comm Problem

I have a sporadic communication problem between the Solar Edge server and the Hughes modem. Foe many weeks no problem, then a complete failure of communication.I first disconnected the ethernet cable to the modem, waited, reconnected, still no communication. I rebooted the Hughes modem, this solved the problem.Solar Edge techs had told me all was good on the Solar Edge side, it had to be a problem with the modem side. I posted before about this, Hughes replied, and said all was good there. It appears not, as a reboot of the  Hughes modem fixed the no comm problem.

From a post regarding this -

I am having a problem with my solar portal access with my modem according to Solaredge the LAN status shows a internet portal problem. I cannot view the data from the solar inverter.  Please let me know the findings Thanks

Solaredge wishes techs to check-

Please see the details below for your reference. Kindly contact your internet service provider and open the ports below:

LCD Inverter:

TCP ports 22222, 22221

We will also need have the ISP whitelist (or grant network access to) these IPs:

Destination Servers

prod2.solaredge.com

prodssl.solaredge.com

should you need more immediate assistance,

please contact us via chat at "solaredge.com/us/service/support.