Understanding TUN Mode in Clash Verge Rev

If you have been using Clash Verge Rev on Windows, you might have noticed that while your browser works perfectly with the proxy, some applications like command-line tools (cmd, PowerShell, Git), Discord, or online games often bypass the proxy settings. This happens because the standard "System Proxy" only affects applications that explicitly look for the Windows proxy configuration. To solve this, we use TUN Mode.

TUN mode creates a virtual network adapter (Layer 3) that intercepts all IP packets at the network stack level. Instead of asking applications to use a proxy, TUN mode forces all outbound traffic into the Mihomo core. This ensures that your entire system—including UDP traffic, DNS queries, and stubborn applications—is properly routed according to your Clash rules. In this 2026 guide, we will walk through the prerequisites, installation of the kernel service, and optimization of TUN settings for the best performance on Windows 10 and 11.

Note: TUN Mode requires Administrator privileges because it modifies system-level network routing tables and installs a virtual driver.

Prerequisites and Requirements

Before enabling TUN mode, ensure your environment meets the following technical standards to avoid "silent failures" where the toggle turns on but no traffic is proxied.

Requirement Minimum Specification Recommended
OS Version Windows 10 (Build 19041+) Windows 11 23H2 or later
Clash Core Mihomo (Meta) Core v1.18+ Latest Mihomo Alpha/Stable
Driver Type Wintun / Windows-TUN Wintun (High Performance)
Permissions Standard User Administrator / UAC Enabled

Step-by-Step: Enabling TUN Mode

The process in Clash Verge Rev is slightly more complex than just flipping a switch, as it involves installing a background service to manage the virtual adapter safely.

1. Install Service Mode

Service Mode allows Clash Verge Rev to run the TUN interface with the necessary system permissions without requiring you to manually click "Run as Administrator" every time you launch the app.

  1. Navigate to Settings:
    Open Clash Verge Rev and click on the Settings icon in the left sidebar.
  2. Locate Service Mode:
    Find the "Clash Core Service" or "Service Mode" section. If the status is "Not Installed" (indicated by a gray icon), click the Install button.
  3. Authorize Installation:
    A Windows UAC prompt will appear. Click Yes to allow the installation of the clash-verge-service. Once successful, the icon should turn green or show "Active".
Tip: If the service installation fails, try disabling your antivirus temporarily. Some security software flags virtual network drivers as suspicious activity.

2. Activate TUN Mode Toggle

Once the service is active, you can enable the actual traffic interception.

  1. Go to General Tab:
    Switch back to the General or Home tab of the application.
  2. Enable TUN Mode:
    Find the toggle labeled TUN Mode. Switch it to On.
  3. Verify Adapter:
    Open your Windows "Network Connections" (type ncpa.cpl in Run). You should see a new adapter named "clash-tun" or "Wintun". If it says "Connected", TUN mode is functioning.

Advanced TUN Configuration & Optimization

Simply turning TUN on is often enough, but for power users and gamers, fine-tuning the config.yaml or the Verge Rev UI settings can significantly reduce latency and prevent DNS leaks.

Stack Selection: System vs. Gvisor vs. Mixed

In the TUN settings, you will see an option for "Stack". This determines how the virtual network handles packets:

  • System: Uses the native Windows network stack. It is the most stable and has the highest throughput for high-speed fiber connections.
  • Gvisor: A userspace network stack. It provides better security and isolation but may have a slight CPU overhead. Use this if the System stack causes BSODs or crashes.
  • Mixed: A hybrid approach. Generally recommended for users who want a balance between compatibility and speed.

DNS Hijacking and Fake-IP

One of the primary reasons to use TUN mode is to prevent DNS Leaks. When TUN is active, Clash Verge Rev can intercept all port 53 traffic. In your configuration, ensure the DNS section is set up as follows for the best results:

dns:
  enable: true
  enhanced-mode: fake-ip
  nameserver:
    - 1.1.1.1
    - 8.8.8.8
  fake-ip-range: 198.18.0.1/16

Using fake-ip allows Clash to return a dummy IP address to the application immediately, allowing the core to handle the real resolution on the remote server. This is essential for bypassing DNS poisoning in restrictive network environments.

Common Troubleshooting for Windows

Even with a perfect setup, Windows updates or driver conflicts can break TUN mode. Here are the most common fixes:

No Internet After Enabling TUN

This usually happens if the TUN route conflicts with your physical gateway. Go to Settings -> TUN Settings and ensure Strict Route is disabled if you are on a complex corporate network. Alternatively, check if "System Proxy" is still on; sometimes having both on simultaneously creates a loop.

Wintun Driver Errors

If you see an error like "failed to create wintun interface", you may need to manually clean up old drivers. Open Device Manager, find "Network Adapters", and uninstall any "Wintun Userspace Tunnel" entries, then restart Clash Verge Rev and reinstall the service.

Warning: Never manually delete the Wintun.dll file while the service is running, as this can lead to system instability or a loss of network connectivity that requires a netsh reset.

TUN Mode for Gaming

Gamers often ask if Clash Verge Rev can replace dedicated "Game Boosters". The answer is yes, provided you use TUN mode. Because TUN captures UDP traffic, it can route game packets through optimized nodes. To minimize ping:

  • Use the System Stack for lower overhead.
  • Select nodes with the lowest latency (ms) and zero packet loss.
  • Use the Process Name rule type to ensure only the game executable goes through the proxy, while Discord or background downloads stay on the direct connection.

Why Clash Verge Rev TUN Outperforms Competitors

Compared to traditional VPN clients or older proxy tools, Clash Verge Rev’s TUN implementation is remarkably flexible. While standard VPNs often force a "kill-switch" or route 100% of traffic, Clash allows you to maintain a "split-tunnel" environment where only specific domains or applications are proxied. Many users find that tools like V2RayN or legacy Clash for Windows struggle with virtual adapter persistence after a system sleep cycle; however, the Rev community fork has significantly improved the clash-verge-service to handle power state changes gracefully.

If you have been struggling with terminal commands failing to connect to GitHub or games lagging due to regional restrictions, switching from System Proxy to TUN Mode is the single most effective optimization you can make. It transforms Clash from a simple browser tool into a comprehensive network controller for your entire Windows environment.

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