Forum Discussion
UDP port 4021 tmobile VS my alarm server...
It is unlikely the T-Mobile is blocking at the network level so it would be related to the router itself. The Envisalink uses UDP port 4021 for communication so the router is blocking that port, po...
Problem with that option is as far as I know a computer/Pi or other has to run all the time in order for the VPN to have something run it. We are not at the property all the time and do not want to add another device that can fail or not work in to the equation.
