RDP Port Forwarding on ASA

By | September 27, 2021

If RDP must be enabled without a VPN follow these instructions.

1) Configuration > Access Rules > Create this the first time only.

  • Interface: Outside or ISP
  • Source: Use a Network object Group (step 4) not an IP here. The value must never be set to ANY.
  • Service: tcp/3389 (do not create a rule for the mapped port)

2) Configuration > NAT Rules

3.1) Provide the following:

  • Name: Unique name With RDP_
  • IP Address: Add the Office PC Internal IP
    • Set statically or assigned via DHCP
    • Add this to CRM > Contact
  • Translated Addr: Interface that user is connecting to

3.2) Click Advanced

  • Real Port:3389
  • Mapped Port: can be anything below ~65,000

4) On the left under addresses find the group to add the user to with a name and Source IP (aboutmyip.com). This group must be in the source list from step 1

5) Create an RDP connection file in T:\RDP\Client that includes:

  • Computer: Router IP: Mapped port from step 3.2
  • domain\username