ip-log.ps1

A lightweight PowerShell script to detect and record network exit IP status
without relying on browsers or proxy-aware tools.

It helps identify LAN IP, China direct exit IP, Japan direct exit IP,
and proxy exit IP, with idempotent logging for long-term observation.

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Features

• Detect local LAN IPv4 address
• Identify China direct exit IP (HTTP, PAC-unaffected)
• Multi-API voting to determine international direct exit IP
• Detect proxy exit IP via blocked HTTPS endpoint
• PAC / proxy status classification
• Idempotent log writing (no duplicate records)
• No browser or GUI dependency

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Output Fields

Each log record contains:

• REAL_LAN – Local LAN IPv4 address
• CN_EXIT – China direct exit IP
• JP_DIRECT_EXIT – Direct international exit IP (consensus)
• PROXY_EXIT – Proxy exit IP
• STATUS – Network status classification

STATUS Values

STATUS	Meaning
NO_PROXY	No proxy detected
MIXED_PROXY	Proxy exit differs from direct exit
PAC_ONLY_BLOCKED	PAC blocks HTTPS but direct exit unchanged
UNKNOWN	Insufficient data

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Example Output

2026-02-05 03:11:22 | REAL_LAN=192.168.1.10 | CN_EXIT=1.2.3.4 | JP_DIRECT_EXIT=5.6.7.8 | PROXY_EXIT=9.9.9.9 | STATUS=MIXED_PROXY

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Usage

Run the following command in PowerShell:

powershell -ExecutionPolicy Bypass -File ip-log.ps1

The script writes records to log.txt in the same directory.

Use Cases

• Verify PAC / proxy routing behavior
• Observe network exit changes over time
• Diagnose mixed proxy environments
• Lightweight network exit auditing on Windows

License

MIT License