What should you do when a subscription link won’t update? This guide helps you distinguish between an expired link, network connectivity issues, DNS resolution problems, and client compatibility issues. It applies to Clash-based clients, v2rayN, and sing-box-compatible clients. Follow the checks in order to avoid repeatedly reinstalling the client or accidentally deleting your existing configuration.
1. Check the error first, then verify the subscription URL
A failed update doesn’t necessarily mean the nodes are unusable: the subscription downloads your configuration, while the nodes establish connections. If your existing nodes still connect, you can keep using them temporarily. Back up your current configuration first, and don’t delete a subscription that still works.
- Open the client’s “Subscription Management” or “Configuration” page, try a manual update, and note the error message and time.
- Copy the full link again from the original publishing page. Check for spaces, line breaks, or missing parameters after the question mark.
- Make sure you’ve imported a subscription URL, not an information page, a QR code image URL, or a login page.
- Check the source page to see whether the URL has changed. Free subscriptions may have their entry points updated, so follow the publisher’s latest instructions.
Common messages include “timeout,” which usually means the request timed out; 401 or 403, which may indicate an authentication issue or access restriction; 404, which may mean the path has been removed; and “parse error,” which often relates to the returned content or configuration format. However, a status code alone isn’t enough to determine the cause.
2. Check whether the issue is related to your IP or network egress
If the same link fails over Wi-Fi but works over mobile data, the issue may be with your current network, egress IP, or access route. Switch networks once and try updating again. There’s no need to immediately buy a service or replace all your nodes.
Some clients offer an option such as “Update subscription through proxy.” If you already have a working node, try enabling it. If the subscription can be accessed directly, try disabling it. Don’t make a broken node your only way to update the subscription. Repeated attempts in a short period may also trigger rate limiting. If you see a 429 message, pause and try again later.
3. How to check DNS and your browser environment
If the log says “unable to resolve host” or “no such host,” check DNS first. Confirm that regular websites open, then reconnect to the network. If you use custom DNS, private DNS, or filtering tools, temporarily switch back to automatic settings to test. Don’t replace the subscription domain with an IP address, as this may break HTTPS certificate verification.
Being able to open the URL in a browser doesn’t mean the client can update it. The browser may have a saved login session, use secure DNS, or have passed a human verification check—conditions the client may not have. If the page shows a login screen, CAPTCHA, or regular webpage content, ask the source for the dedicated subscription URL.
Subscription links may contain personal tokens. Don’t share screenshots or submit them to unfamiliar conversion websites. Testing in a browser can confirm whether the URL is accessible, but a successful download doesn’t guarantee format compatibility.
4. What to do if the download succeeds but import fails
Check whether the source provides the right format. Clash configurations, collections of V2Ray share links, and sing-box configurations aren’t necessarily interchangeable. Choose the entry point that matches your client, and update the client through official channels. If the log reports a certificate error, first check your device’s date, time, and time zone. Don’t disable certificate verification.
If the problem persists, send the publisher your client name, version, error text, and network type. Hide the full subscription URL and any tokens. Free nodes on this site may also need to be obtained again if an entry point has changed or stopped working. When troubleshooting, change only one thing at a time so you can identify the cause.