7 Initial Setup Steps for Your First Clash Install: Cross-Platform Checklist

Why You Need a Unified Checklist for Your First Install

There's no shortage of clients in the Clash ecosystem — Clash Verge Rev on Windows, ClashX Meta on macOS, Clash Meta for Android, and each one arranges its buttons differently. But strip away the interface and they're all running the same underlying proxy core logic. Early on that meant Clash Premium; today most mainstream clients have switched over to Clash Meta (renamed mihomo after the project rebrand). Because the core is shared, the setup issues you'll run into are the same across the board: how proxy ports get assigned, whether the system proxy should take over automatically, and how to import a subscription link without breaking something. Listing these steps out ahead of time saves a lot more time than digging through error messages after something goes wrong, and it helps you dodge the classic first-timer frustrations — "installed it but now nothing loads" or "imported the subscription but there are no nodes."

The 7 steps below aren't tied to any specific client's UI — they're the general steps you'll hit during the first install of any client built on the Clash / Clash Meta core, laid out in the order you'd actually perform them.

Before You Install: Two Things to Verify First

Before you even start the install, there are two quick checks worth doing upfront — they'll save you half the troubleshooting later.

1. Confirm the Installer Comes From an Official Source

Clash-family clients are almost all open source, and they're distributed through their respective project's release page on a code hosting platform. Before installing, check the version number and last update date — an installer that hasn't been updated in a long time, or carries an unusually old version number, is likely from a branch that's no longer maintained. Its config field support may lag behind current subscription generators, which leads to "unrecognized field" errors when importing a config.

2. Know the Difference Between Clash and Clash Meta (mihomo)

If the config file from your subscription includes tun, dns.enhanced-mode, or a rule-providers entry with something other than behavior: classical, that config is written for the Clash Meta core syntax. Installing a client that only supports the legacy Clash Premium core will either throw a "field not supported" error or silently ignore that field. Most mainstream clients now ship with Clash Meta / mihomo built in by default, so just check the core type noted in the client's documentation before installing to sidestep this issue entirely.

7 Initial Setup Steps to Complete on First Launch

Once the install is done and you've opened the main client window, work through these 7 steps in order — this is the cross-platform initialization flow.

1. Check whether the mixed port is already in use.The Clash core listens on a mixed proxy port by default (commonly 7890), serving both HTTP and SOCKS5 proxy traffic. If another proxy tool you previously installed is already using that port, the client will flag a port conflict on startup — just go into settings and change it to an open port, which won't affect anything else.
2. Decide whether to enable the system proxy.The system proxy setting routes OS-level network requests through the port Clash is listening on, and most clients have a prominent toggle for it. On desktop (Windows/macOS/Linux), it's worth turning this on first for basic testing — it saves you from configuring a proxy separately for every app.
3. Decide whether to enable TUN mode.TUN mode creates a virtual network adapter on your system that captures all traffic globally — not just traffic from apps that respect the system proxy setting. It's useful if you need to handle UDP traffic or deal with apps that ignore system proxy rules. Enabling TUN usually requires administrator rights or a system-level helper service, so check whether the client prompts for extra authorization the first time you turn it on.
4. Import your subscription link.Paste the link your subscription provider gave you into the config management page, then click update to pull the config. After importing, check that the node list shows a reasonable number of nodes before jumping into rule mode.
5. Verify the proxy mode.The Clash core offers three basic modes: Rule, Global, and Direct. Rule mode routes traffic automatically based on the policy groups and rule sets in your config file, and it's the default you should stick with for everyday use. Global mode is handy for quickly testing whether a node works, while Direct mode effectively turns proxying off.
6. Check your DNS settings.Make sure the DNS section in your config file is enabled (enable: true), and note whether the resolution mode is Fake-IP or real IP — this directly affects how accurately domains get routed, and we'll cover the typical symptoms of each below.
7. Confirm the GeoIP/GeoSite databases have loaded.Rule entries like GEOIP,CN or GEOSITE,category-ads depend on the client's built-in geo database, which is usually downloaded automatically on first launch. Check the main window or the logs for any download failure notices.

Common Beginner Errors and How to Fix Them

Pretty much everyone hits at least one of these the first time they set up Clash — knowing the cause ahead of time saves a lot of troubleshooting.

"Mixed port already in use"

This means another program on your machine is already using that port — usually a proxy tool you installed before that didn't fully quit. The fix is to change the port in settings to something less common (like 17890), then save and restart the proxy service.

Subscription Imports Successfully But the Node List Is Empty

This is usually not a client issue — the subscription link itself is probably returning empty content or the wrong format. Try opening the subscription link directly in a browser to see if it returns a Base64 string or YAML text. If the link itself looks fine, check whether the client's update interval setting is blocking the request.

Some Sites Load, Others Don't

This is usually related to DNS resolution mode or your routing rules. If you're running Fake-IP mode, some scenarios that rely on real IP communication (like service discovery on a local network) can behave oddly — you can add the relevant domains to the fake-ip-filter allowlist in your config. If a rule group is matching to a direct-connection policy, check whether the rule set order is misrouting that domain into the direct group.

No Internet at All After Enabling TUN Mode

This is almost always a permissions or network adapter driver issue. On Windows, confirm you're running as administrator and that the helper service installed correctly; on Linux, confirm the kernel supports TUN devices and that your user has the right permissions. If this happens, turn off TUN and fall back to system proxy mode to confirm basic connectivity works, then troubleshoot the TUN-related permission prompts separately.

Recommended Order for Subscription Import and Mode Switching

Putting all of this together, a solid approach after your first install is: start with just the system proxy enabled, run through the default policy groups from your subscription in Rule mode, and confirm you can reach common sites normally. Then decide whether TUN mode fits your network setup. Only after that should you move on to advanced options like DNS resolution mode or GeoIP database update frequency. Skipping straight to advanced settings without verifying basic connectivity first is the number one reason beginners spend forever troubleshooting — because it's hard to tell whether an issue is caused by the setting you just changed or by a pre-existing config problem.

Also worth noting: different clients handle config update frequency differently. After your first install, it's worth setting the subscription update interval to something reasonable (once a day, for example) to avoid putting unnecessary request load on the subscription server, and to reduce update failure notices caused by network hiccups.