Help with configuration commands to open port 3389 on 1841 router

[Clay Plaga]

I have to open port 3389 for RDP for a terminal server connection on a Cisco 1841 router. The router is part of a test server and it is not connected to the internet. I I only need an inside NAT configuration. I am totally new to this, so I hope I am using the correct terminology. I think I may know how to do this but I'm just starting to learn the CLI commands. Can someone please assist me with the exact command that I have to apply to my router. Also, do I have to configure an ACL as well? I have never done this before. Thank you.

[RyanB]

This answer is highly dependent on a few factors.

- Source IP or Network
- Destination IP or Network
- Currently configured ACL entries, if any (for ordering)
- whether NAT is being used

However, in its most simple form..

ip access-list extended <acl_name>
permit tcp <source> <destination> eq 3389

interface <interface name>
ip access-group <acl_name> <direction (in/out)>

I would recommend reviewing some Cisco documentation before proceeding.

https://www.cisco.com/c/en/us/support/docs/security/ios-firewall/23602-confaccesslists.html