netstat与PowerShell Get-Process的区别及结果不一致问题咨询

Great question—this is a super common gotcha when mixing Windows network tools and PowerShell process management. Let’s break this down step by step.

Core Differences Between netstat and Get-Process #

These two tools pull data from completely different parts of the Windows system, which is why their results don’t always line up:

• Focus & Data Source:
  • netstat is a network-focused utility that talks directly to the Windows TCP/IP stack. It tracks active network connections, listening ports, and the PID associated with each connection—even if that PID is tied to kernel-level operations.
  • Get-Process is a PowerShell cmdlet that queries the Windows Process Manager, which only lists user-mode processes (things with an executable .exe file you can see in Task Manager). It doesn’t touch kernel-level system components.
• Handling System/Kernel Entities:
  • When netstat encounters a connection owned by a kernel-mode driver or system component (not a user process), it labels it [System] and reports the PID used by the network stack to manage that connection.
  • Get-Process ignores these kernel-level "pseudo-processes" entirely because they aren’t traditional executable processes you can interact with.

Why PID 13708 Is Missing From Get-Process #

In your case, that lingering port 18882 labeled [System] is a classic leftover from an unclean proxy shutdown:

• When Titanium Web Proxy doesn’t exit properly, it might leave a network endpoint (the listening port) that gets picked up and held by the Windows kernel instead of the proxy’s own process.
• The PID 13708 netstat shows is tied to the kernel’s handling of that port, not a user-mode process. That’s why Get-Process can’t find it, and Stop-Process throws an error—there’s no actual .exe process to terminate here.

How to Free Up the Lingering Port #

Since you can’t kill a kernel-held port with process termination tools, try these fixes:

• Restart the Network Connections service: Open Services (services.msc), find "Network Connections", right-click and select Restart. This often clears lingering network endpoints.
• Reset the TCP/IP stack: Run Command Prompt as admin and execute netsh int ip reset. Note that this will reset your network adapter settings temporarily, so you might need to rejoin Wi-Fi or reconfigure static IPs if you use them.
• Reboot your system: If all else fails, a reboot will clear all kernel-held resources, including that stuck port.

内容的提问来源于stack exchange，提问作者Cosmin