Windows: Error: listen EACCES: permission denied 0.0.0.0:{{PORT}}

I got an error listen EACCES: permission denied 0.0.0.0:4200 while starting Angular project by “npm start”.

Solution 1

Run:

net stop winnat
net start winnat

Solution 2

Original answer

1. I ran netsh int ipv4 show dynamicport tcp and verified that the range trampled commonly-used ports (postgresql's :5432 in my case)
2. Ran netsh int ipv4 set dynamic tcp start=10000 num=20000 to reset it to something sane
3. Also ran reg add HKLM\SYSTEM\CurrentControlSet\Services\hns\State /v EnableExcludedPortRange /d 0 /f for good measure as netsh int ipv4 show excludedportrange protocol=tcp showed a lot of excluded ports
4. Reboot

In my case I changed “start” to “10000” and “num” to “20000”.