I am trying to configure an inbound Terminal Services rule on a Sonicwall NSA250M - latest O/S etc.
Office Public IP on WAN interface = 18.104.22.168
Internal IP of server I need to RDP to = 10.0.0.1
I have successfully added Firewall and NAT rules that allow RDP from 'Source=Any' however I need to restrict access so that only one or two remote public IP ranges are allowed to connect by RDP, e.g. a third party vendor who need access to the server for remote support - their public IP range is, say 22.214.171.124 to 126.96.36.199
I have tried adding 188.8.131.52/29 as an address object named 'Support' and then switching just the Source within the Firewall and/or NAT rules from 'Any' to 'Support' however this does not work. I have tried moving the 'Support' address object into the various default Zones to test, with same result.
I cannot find any documentation on the Sonicwall site for this scenario - am I missing something, can anyone help?