Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I have a weird issue here.

I'm running Windows 8 Pro. The client computer is also running Windows 8 Pro. Remote Desktop works when I'm in the same network.

I tried connecting using my external IP Address and my DynDNS account, neither works. I disabled Windows Firewall and setup DMZ for my computer on the router, still can't get remote desktop to work.

I verified, port 3389 is open, which is obvious since I'm running DMZ! My ISP, Bell Canada (modem/router: Sagemcom F@st 2864), blocks port 80 and 25, but I don't need those for RDP, do I?

The funny thing is RDP rejects the connection instantaneously for my IP or DynDNS while it takes a while for another address.

Thank you, Michael

share|improve this question

I found the issue.

I am not sure if this is my network configuration or a normal thing but I cannot connect using my external IP when I'm at home, it works fine at another location.

share|improve this answer

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .