Nodejs 上的端口 3000 权限被拒绝
当我在端口 3000 上运行我的 nodejs 项目时，出现以下错误：
Error: listen EACCES: permission denied :::3000
at Server.setupListenHandle [as _listen2] (node:net:1330:16)
at listenInCluster (node:net:1378:12)
at Server.listen (node:net:1465:7)
at Function.listen (F:\Projects\NodeJS\Nodejs start\Nodejs start\node_modules\express\lib\application.js:618:24)
at Object.<anonymous> (F:\Projects\NodeJS\Nodejs start\Nodejs start\app.js:34:5)
at Module._compile (node:internal/modules/cjs/loader:1103:14)
at Object.Module._extensions..js (node:internal/modules/cjs/loader:1155:10)
at Module.load (node:internal/modules/cjs/loader:981:32)
at Function.Module._load (node:internal/modules/cjs/loader:822:12)
at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:77:12)
Emitted 'error' event on Server instance at:
at emitErrorNT (node:net:1357:8)
at processTicksAndRejections (node:internal/process/task_queues:83:21) {
code: 'EACCES',
errno: -4092,
syscall: 'listen',
address: '::',
port: 3000
不仅在端口 3000 上，而且在任何端口上，程序都无法运行，并且出现上述错误。 为了解决这个问题，我在CMD上运行net stop winnat，我得到：
Windows NAT 驱动程序服务未启动。
为了启动 winnat，我运行 net start winnat ，我明白了
Windows NAT 驱动程序服务已成功启动。
但问题并没有解决，除了重启系统还有其他办法吗？
when i run my nodejs project on port 3000, get following error:
Error: listen EACCES: permission denied :::3000
at Server.setupListenHandle [as _listen2] (node:net:1330:16)
at listenInCluster (node:net:1378:12)
at Server.listen (node:net:1465:7)
at Function.listen (F:\Projects\NodeJS\Nodejs start\Nodejs start\node_modules\express\lib\application.js:618:24)
at Object.<anonymous> (F:\Projects\NodeJS\Nodejs start\Nodejs start\app.js:34:5)
at Module._compile (node:internal/modules/cjs/loader:1103:14)
at Object.Module._extensions..js (node:internal/modules/cjs/loader:1155:10)
at Module.load (node:internal/modules/cjs/loader:981:32)
at Function.Module._load (node:internal/modules/cjs/loader:822:12)
at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:77:12)
Emitted 'error' event on Server instance at:
at emitErrorNT (node:net:1357:8)
at processTicksAndRejections (node:internal/process/task_queues:83:21) {
code: 'EACCES',
errno: -4092,
syscall: 'listen',
address: '::',
port: 3000
Not only on port 3000, but also on any port, the program does not run, and the mentioned error occur.
for solving this problem, i run net stop winnat on CMD, i get:
The Windows NAT Driver service is not started.
for start the winnat, i run net start winnat , i get
The Windows NAT Driver service was start successfully.
But the problem was not solved.Is there any other way but to restart the system?
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您可以尝试在Windows系统上，重新启动“主机网络”服务
服务”可能会解决该问题。
或尝试多次重新启动计算机
或尝试在管理员权限下打开CMD并运行：
网络停止winnat
网络启动winnat
You can try On Windows systems, restarting the service "Host Network
Service" may resolve the issue.
or try to restart your computer more than one time
or try open CMD under admin rights and run :
net stop winnat
net start winnat
读取环境变量时，应将其转换为数字。
尝试将
parseInt()添加到变量中：When reading an environment variable, you should convert it to a number.
Try adding
parseInt()to the variable: