Can't open port in Windows 10?

finsfree

Member
Hi,

I'm trying to access a computer outside of my network using RDP port 3388.

I already have my network firewall (Zywall USG 20) setup to use RDP port 3389 for another computer, so I can't use the same port for 2 different PC's. And "NO" I don't want to use 3rd party software like teamviewer or VNC!

I have created a "rule" in the Windows 10 firewall to open port 3388. In addition, I had to change some settings in the Windows registry to RDP 3388.

However, I still can not connect.

To test my issue, I used "netstat -a" to see all open ports and port 3388 didn't show up. Also, used www.canyouseeme.org to see if 3388 was open and it wasn't.

Why am I not able to open ports on a Windows 10 Pro PC?

Oh BTW, RDP is getting though the network firewall (Zywall USG 20) just fine according to the log files "port 3388 accepted".

Thanks,
 
Last edited:

beers

Moderator
Staff member
Did you permit the traffic on the Zywalll ACL as well?

To test my issue, I used "netstat -a" to see all open ports and port 3388 didn't show up.
You would use 3388 on the WAN IP but it should forward to 3389 on the LAN IP.

Also, I wouldn't really expose those directly to the internet (in addition to being on default ports). A VPN would be a better solution.
 

finsfree

Member
Did you permit the traffic on the Zywalll ACL as well?


You would use 3388 on the WAN IP but it should forward to 3389 on the LAN IP.

Also, I wouldn't really expose those directly to the internet (in addition to being on default ports). A VPN would be a better solution.

At this point, I'm not trying to hide anything. I just want to RDP into 2 different PC's.

If I can found out why I can't open up ports on my Windows 10, I think I can solve this issue.
 

finsfree

Member
Because I already have port 3389 pointed to another PC. I want to be able to RDP into 2 different computers but I can't use the same port (3389) so that is why I chose 3388 (different).
 

beers

Moderator
Staff member
The port would be 3389 on the Windows PC. On the external IP you would forward 3388 to 3389 internally.
 

finsfree

Member
I'm guessing the best way would be to forward the port the PC like you are saying. I always know there was a better way than to mess with the registry.:rolleyes:
 

voyagerfan99

Master of Turning Things Off and Back On Again
Staff member
Once you change the port in the registry you need to restart the computer. So if you didn't do that, it will still be on 3389.

You also still need to forward the port on the router if you have not done that already.
 

finsfree

Member
Once you change the port in the registry you need to restart the computer. So if you didn't do that, it will still be on 3389.

You also still need to forward the port on the router if you have not done that already.

Thanks but I think I'm going to do what beers said and do port to port forwarding in the network firewall.

Makes more since.
 
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