Originally Posted by Tennobanzai
They just want to access their work computer from home. They were able to with their old computers but we just got new ones. I guess the IP/Port is only needed for the iPhone app
Are the new computers using the same IP addresses as their old computers? If the port forwarding wasn't changed it is still trying to send the traffic to the IP address, but there is no device with the matching IP address for them to access.
for the port for RDP the default is 3389, however if it was changed you will have to find out what it was by either going into the router and finding the port forward and you can also find the IP addresses there as well.