Can't connect to a Windows XP workstation using rdp after joining the workstation into the domain

I cannot connect to a Windows XP workstation using rdp after joining the workstation into the domain from remote via the router.
RDP from inside the local network is possible.
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Sekar ChinnakannuStaff EngineerCommented:
Try to disable the firewall in workstation and also make sure rdp port opened in firewall too.
If you're going through a router that is doing NAT then you will have to setup port forwarding for port 3389 to the ipaddress that the computer is getting.  It's best to give the computer a static address so you can setup the forward.  View your router documentation to find out how to setup port forwarding.
Rob WilliamsCommented:
Are you using a VPN to connect? If so the server has likely applied firewall rules to the PC. If that is the case you need to allow the remote subnet as per:
Active Protection takes the fight to cryptojacking

While there were several headline-grabbing ransomware attacks during in 2017, another big threat started appearing at the same time that didn’t get the same coverage – illicit cryptomining.

eplutherAuthor Commented:
Hi RobWill,
your proposal seems good - but i can't change the scope of the remotedesktop-exception - it's greyed!
Rob WilliamsCommented:
If it is grayed out it is due to a group policy being applied. Usually you cannot enable/disable the firewall but you can edit the scope options.
It sounds like you will have to locate and edit the policy on the server. The following link outlines how to do so on some windows servers:

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
eplutherAuthor Commented:
The description in the linked article helped to find the right place in the jungle of windows sbs group policies (german).
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Microsoft Server OS

From novice to tech pro — start learning today.