Clash Frequently Asked Questions

Clash is a rule-based cross-platform proxy core written in Go. GUI clients like Clash Verge Rev and ClashX Pro are graphical wrappers built on this core.

Traditional VPNs route all system traffic. Clash supports complex routing rules that precisely separate local traffic from traffic that needs a proxy — keeping speed and compatibility for local apps.

Two things: a Clash client for your platform, and a configuration file with proxy node information (usually provided by a third-party service as a YAML file or subscription URL).

Yes. The Clash core and the main clients (Clash Verge Rev, FlClash, etc.) are all free and open-source, and can be downloaded from this site at no charge.

A subscription link is a URL that contains proxy node configuration. It's provided by your proxy service in their user dashboard. Clash itself does not ship any nodes.

Open your Clash client, go to the Profiles / Subscriptions tab, paste your subscription URL and click Download or Update. Then select the profile to activate it.

YAML is strict. Common causes: tabs used for indentation (only spaces are allowed); strings with : not quoted; full-width colons used by mistake instead of ASCII colons.

Check in order: (1) your local network works; (2) system time is accurate (VMess is sensitive to clock skew > 90s); (3) update the subscription; (4) contact your provider to check account status.

Some apps (games, UWP apps, terminals) don't use the system proxy. Enable TUN mode: on Windows in Clash Verge, on macOS use "Enhanced Mode" in ClashX Pro.

The default port 7890 may be in use. Change mixed-port in your config to any free port. On Windows, use netstat -ano | findstr :7890 to find the occupant.

Enable fake-ip mode in your config and add fallback DNS. See the tutorial for a full example.

The core and UI cannot communicate — usually because the firewall blocks the local port. Turn Windows Firewall off and back on, or add an exception for Clash Verge Rev.

Go to Windows Settings → Network & Internet → Proxy → Manual proxy setup, and turn off "Use a proxy server".

Run sudo xattr -rd com.apple.quarantine /Applications/ClashX\ Pro.app in Terminal, or click "Open Anyway" in System Settings → Privacy & Security.

Make sure no other VPN app is running (only one VPN allowed at a time); verify your subscription imported successfully; remove old VPN entries in Settings → Network & Internet → VPN.

Make sure the subscription URL starts with http:// or https:// and hasn't expired. Open the URL in a browser to confirm it returns valid content.