Windows 10: Unable to use TCP ports above 49728

Hi guys,

I originally saw this issue within a Node.js app, but I've replicated it in a basic winsock TCP server example as well. Ever since the latest Windows Update, I'm unable to use ports above 49728 in my applications. I get access denied errors when I try to bond.


I've tried during all windows defender and firewall functionality off, but that seems to make no difference. I took a look through the release notes of the past few released, but couldn't find anything that seemed related to this.


Has anyone experienced this? This has happened with two of my Windows machines (running Win10 Pro) after they restarted and received the latest update.


-Nick

:)

 

How to reset dynamic port for TCP/IP to default

Hi,

Thank you for writing to Microsoft Community Forums.

Please reply to the following questions to help you further:

• Which version of Windows is installed on the computer?
  
• Is the computer connected to a domain network?
  

I would suggest you to refer the article on
The default dynamic port range for TCP/IP to know more about default dynamic range.

However, if you have further queries related to this issue, you can post your query in

TechNet forums, where we have support professionals who are well equipped with the knowledge on dynamic ports.

Hope it helps.

Please reply with the status of the issue, we will be glad to help you further.

Nikhar Khare

Microsoft Community - Moderator

 

Looking for IIS real time TCP viewer, Logger

Can anyone suggest a free real time TCP viewer-logger?

Later edit:
Currently I have TCP view from microsoft. It would be nice if it was sort of the same thing with the IIS log files, mail, and ftp ports, etc. along with some parsing.

 

Unable to enable Net BIOS over TCP/IP in PowerShell


Hi Eagle51,

When I try to change the value in the registry, it still shows as disabled.

I ran the commands you suggested and still no luck. However, should the value be changed from 0 to 1 in the last command?