Clash Troubleshooting Guide

If you're experiencing "System proxy enabled but can't access internet", "All nodes timeout" or "Baidu works but Google doesn't", follow these steps to troubleshoot.

🔴 Core Troubleshooting Checklist

1. Check Subscription Expiry

This is the most common cause.

• Symptoms: All nodes show Timeout or red unavailable status.
• Solution: Log in to your service provider's website and check if your subscription has expired or traffic has been exhausted.
• Tip: Free trial plans usually have short validity periods.

2. Check System Time

Clash's encryption protocols (VMess, Trojan) are very sensitive to device time. A time difference of more than 90 seconds will cause connection failures.

• Symptoms: Nodes can be pinged but web pages won't open.
• Solution: Go to system settings, toggle "Set time automatically" off and on again to sync with standard time.

3. Check Mode Selection

• Global Mode: Forces all traffic through proxy. If your node is down, even domestic sites won't work.
• Rule Mode: Domestic direct, foreign via proxy. Recommended for daily use.
• Direct Mode: No proxy at all.
• Troubleshoot: Make sure you haven't accidentally selected "Direct Mode". Rule Mode is usually recommended.

4. Check Port Conflicts

• Symptoms: Clash startup error, port (7890/7897) occupied.
• Solution:
  • Close other proxy software that might be using the ports.
  • Change port number in Clash settings (e.g., to 7892), then restart Clash.

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🟡 Advanced Troubleshooting

5. TUN Mode and System Proxy

• Problem: Some applications (UWP apps, games, command line) don't use system proxy.
• Solution:
  • Try enabling Clash's TUN Mode (requires administrator privileges).
  • Or manually set proxy in terminal: export all_proxy=http://127.0.0.1:7890

6. DNS Resolution Issues

• Symptoms: Telegram works but websites (YouTube) don't open, browser shows DNS_PROBE_FINISHED_NXDOMAIN.
• Solution:
  • Check if browser has "Secure DNS" (DoH) enabled, try disabling it.
  • Try changing Clash DNS mode to Fake-IP (usually better compatibility).
  • Clear local DNS cache (ipconfig /flushdns on Windows).

7. GeoIP Database Error

• Symptoms: Routing doesn't work correctly, domestic sites also go through proxy.
• Solution: Find the GeoIP/GeoSite database update button in Clash client settings and click update.

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🟢 Still Can't Fix It?

If you've tried all the above steps and it still doesn't work, it's most likely a node issue or invalid subscription link.

1. Try updating subscription: Right-click subscription list -> Update Subscription.
2. Try a different provider: If the provider has shut down or lines are down, there's nothing you can do. Try a backup provider at Getting Trial Nodes.
3. Reset network: In rare cases, system network settings are corrupted. Try resetting system network settings.