I have a Windows SBS 2011 that I can not remote to using RDP. At one time I could. I have the port 3389 as the port on the server. I have turned off windows firewalls and no change. The router has the service in there and it is mapped to the server's internal IP address. I have issues with a camera system also on the network, that I cannot access outside of the network. If I go to canyouseeme.org and put in 3389 it says it can not see it. I have another server on the network that I can remotely access with a different port. It pretty much is a no brainer, but for the life of me, I can't determine what it is. I have researched and tried many different things to fix it. Could there be a separate router on the network? It is a large building. But I have no issues with just general networking. If an additional router were on the network, I would think that things would be unstable. Help!