netstat -ano >>d:\\tool\e.txt

详情参考：https://www.jianshu.com/p/9ee0166aa01c

微软：https://learn.microsoft.com/zh-cn/troubleshoot/windows-client/networking/tcp-ip-port-exhaustion-troubleshooting

1. HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
2. “MaxUserPort”=dword:0000fffe

MaxUserPort

查看TCP连接数：

netstat -n | find /C /I "established"