How Clash TUN Mode Works and How to Enable It

Define what you need before comparing providers

A proxy “airport” is a provider that sells access to proxy servers, usually through a subscription link or a downloadable configuration. Choosing one is not just a matter of finding the highest advertised speed or the lowest monthly price. A service that performs well for one person may be a poor fit for another: location, network conditions, device count, data allowance, supported protocols, and the provider’s operating practices all matter.

Start by writing down what you actually need. List the devices you plan to use, the client and core you intend to run, your approximate monthly data use, and the regions or applications that matter. Also note whether you need stable connections for calls and meetings, occasional browsing, large downloads, or several devices online at once. These requirements give you a basis for comparing plans instead of relying on slogans such as “premium,” “unlimited,” or “ultra-fast.”

• Estimate your traffic: Review a typical week of usage if your devices show per-app data consumption. Include video, updates, cloud backups, and other background traffic.
• Check the client and core: Record whether your client uses mihomo, another Clash-compatible core, or a different format. Subscription support is not identical across clients.
• Identify the important locations: A nearby, stable route may be more useful than a long list of distant regions you will rarely select.
• Decide your tolerance for interruption: If a short outage would disrupt work, evaluate status communication and support as carefully as price.

Be clear about the rules that apply where you live and about the terms of the services you access. A proxy subscription does not itself make every use lawful or permitted by another service’s terms. Avoid providers that encourage illegal activity or promise that using a proxy makes a user untraceable.

Evaluate stability and performance with repeatable tests

A speed test taken once is a snapshot, not a reliability assessment. Results vary with your access network, time of day, device, test server, and the route between you and the proxy. A high peak download figure can coexist with frequent reconnects, high latency, or poor performance during busy hours. Test a service from the network and device you expect to use, and compare it with your ordinary connection.

If the provider offers a legitimate trial or a low-cost short plan, use it to make a small test log. For 24 to 72 hours, record the date, time, network type, selected node or region, connection result, approximate latency, and any interruption. A simple note such as “Wi-Fi, 20:30, node A connected, several timeouts during a 30-minute call” is more useful than a screenshot of a single peak-speed result.

Test different locations individually before relying on automatic selection. A client’s URL-test or latency check generally measures reachability or response time to a chosen test URL; it does not guarantee that every website, streaming service, or application will work. Likewise, a green status indicator is not proof of sustained throughput. Check whether the result reflects the actual node and policy group you use.

Do not interpret one poor result as proof that the entire service is unusable. First check your local network, test another node, and repeat at a different time. But if failures recur across locations and sessions, preserve the timestamps and contact support before buying a longer plan.

Check traffic limits and the real cost of a plan

Plan labels can hide important differences. “Unlimited” may refer to the absence of a fixed monthly data quota while still being subject to fair-use rules, speed limits, concurrency limits, or restrictions on particular types of traffic. A large quota may also be less useful than it appears if it is shared across devices or consumed by background downloads. Read the plan details and, when a term is unclear, ask the provider to explain it in writing before paying.

Calculate the effective cost over the period you realistically expect to use the service. Compare a monthly plan with a longer plan by dividing the full price by its term, but do not treat the lower monthly equivalent as a saving if you are unsure the provider will meet your needs. Include payment fees, currency conversion, renewal pricing, and whether the plan can be paused or cancelled.

Pay-as-you-go or short-duration plans can make sense when usage is irregular or when you are evaluating an unfamiliar service. They may cost more per unit of data, and some providers may not offer them, but they limit the amount committed before you have evidence about performance. A longer plan may be reasonable after repeated tests, clear terms, and successful support contact; it is not a substitute for those checks.

Take a screenshot or save a copy of the plan description and checkout total. If the provider changes quotas or pricing later, your record helps you distinguish the terms shown when you purchased from the current offer.

Verify Clash and mihomo subscription compatibility

“Clash-compatible” can mean several different things. A provider might supply a complete YAML configuration with proxy groups and rules, a subscription that contains node entries only, or a link in a format intended for a different application. These are not interchangeable. A client may import a node list successfully but still lack the rule groups or DNS settings you expected. Confirm what the provider actually supplies before treating a successful import as proof of full compatibility.

• Ask which format is provided: Is it a complete Clash or mihomo YAML profile, a node-only subscription, or another client-specific format?
• Check protocol support: Compare the protocols and options in the subscription with the core version used by your client. Newer mihomo fields may not work in older cores.
• Confirm update behavior: Find out how often the profile should refresh, whether the URL can be reset, and what happens if a token is exposed.
• Test without replacing a working setup: Import the new profile separately or back up your current configuration before switching.

Use the client’s subscription or profile update feature rather than manually editing a generated subscription file. Providers often regenerate that file during refresh, which can overwrite local edits. If your client supports overrides or merge settings, use those features for local adjustments and check the client’s documentation for the exact behavior.

After importing, inspect the effective profile and logs. Confirm that the expected proxy names appear, groups reference valid proxies, and the configuration loads without unsupported-field or YAML errors. Select a node and test it, then check that the intended policy group is being used. A profile can parse correctly while a rule sends traffic through DIRECT or a different group.

Subscription links can also reveal operational details such as an account identifier or expiry information. Use a trusted client, avoid saving the URL in shared documents, and consider whether the client stores profiles in a location accessible to other users of the device. Compatibility is useful, but it does not remove the need to protect the credential.

Read privacy policies and refund terms closely

A provider needs some information to create an account, deliver a configuration, and process a payment. The important question is what it collects, how long it retains the information, who can access it, and what happens after an account is closed. Look for a privacy policy that identifies data categories and retention practices rather than relying on a banner that simply says “no logs.” That phrase can be ambiguous and is not an independent verification of a provider’s systems.

Check whether the provider records connection metadata, account activity, payment details, support messages, or diagnostic information. Also check whether payment processors or other service providers receive data. A policy may distinguish traffic contents from operational records; do not assume that one statement answers every privacy question. If the policy is missing, contradictory, or difficult to understand, treat that uncertainty as part of the buying decision.

• Payment: Check the accepted methods, billing descriptor, currency, fees, and whether payment is recurring.
• Refunds: Read the eligibility period, exclusions, process, and whether refunds are partial or discretionary.
• Service changes: Look for terms covering maintenance, quota changes, account suspension, and discontinued regions.
• Account closure: Find out whether cancellation stops renewal only or also removes stored account data.

Do not assume that every payment method is reversible or that “refund available” means a refund is automatic. Save the receipt, order details, terms, and any support response. If a provider promises a trial, check whether it requires a payment method and whether cancellation must occur before a stated time or date.

Be cautious with claims of guaranteed anonymity, permanent uptime, or immunity from monitoring. A provider can describe its policies and security practices, but broad guarantees that cannot be tested should not be treated as evidence. Prefer specific, understandable terms and a clear way to contact the service over sweeping assurances.

Use a low-risk checklist before committing

Before purchasing, run through a short checklist and keep the answers somewhere you can find them. This reduces the chance of buying based on a temporary promotion or an attractive node list while missing a renewal condition or compatibility issue.

1. Confirm the product: Verify that the checkout page belongs to the provider you intended to use and that the plan, duration, and currency are correct.
2. Confirm fit: Check the device limit, traffic rules, supported regions, protocols, and the exact subscription format.
3. Test first where possible: Use an official trial or the shortest available plan. Do not use someone else’s subscription link as a test.
4. Record results: Compare more than one node and more than one time period. Note failures as well as successful speed tests.
5. Save the terms: Keep the displayed price, renewal setting, refund policy, and support instructions with your receipt.
6. Protect access: Store the subscription URL as a credential and avoid posting it in logs or screenshots.
7. Decide when to stop: If the provider cannot clarify a material term or repeated tests fail, do not extend the commitment simply because you have already spent time setting it up.

When contacting support, provide a concise report: client and core versions, operating system, approximate time and time zone, the affected region or node label, the exact error, and what you already tested. Redact the subscription token, account password, and other credentials. A useful support response should address the reported issue or ask a relevant follow-up question; a generic promise of “top speed” does not resolve a connection failure.

Reassess the service when the plan renews, the provider changes its terms, or your usage changes. Keep a backup of a working configuration and know how to disable the proxy or restore your previous network settings. A provider is a better fit when its performance is consistent enough for your use, its limits and renewal terms are understandable, its profile works with your client, and its privacy and support practices meet your expectations—not merely when its advertisement lists the most nodes.