What Is a Subscription Link? How to Get, Import, Update, and Revoke One

A subscription link is not a client installer or a single fixed route. Think of it as a revocable configuration key: the client accesses the link, retrieves the nodes, protocol settings, and group information currently published by the service, then turns them into selectable routes. Once you understand this, failed imports, ineffective updates, and leaked links can all be investigated using the same logic.

Many usage problems start with blurred concepts. Some people treat a subscription link like a username and password; others confuse a node address with a subscription link, or assume that a successful import means all traffic is already being routed as intended. In reality, retrieving configuration, parsing it, choosing a node, establishing a connection, applying routing rules, and resolving DNS are connected but independent steps.

What’s inside a subscription link

What the service returns depends on the client format. Some subscriptions contain encoded text, others use structured configuration, and some services generate a format dynamically based on the client type. Encoding changes how content is represented; it is not encryption and does not remove the link’s access permissions.

A usable subscription typically describes node names, server endpoints, ports, protocols, authentication parameters, transport methods, and TLS settings. After reading them, the client displays them as a node list or policy group. The link may also contain a token that identifies subscription access; once that token is revoked, the old link can no longer retrieve new configuration.

Object	Purpose	Common misconception	Correct handling
Subscription link	Retrieves a set of configurations from the service	Treating it like an ordinary web address	Manage it as a credential; do not share it publicly
Single-node link	Describes one connection endpoint	Assuming it automatically syncs every route	Import a subscription when you need the full list
Client configuration	Stores nodes, policies, and local options	Assuming deleting the subscription revokes remote access	Reset it on the service side after a leak
Protocol	Defines how the client communicates with the endpoint	Treating the protocol name as a verdict on route quality	Judge it together with the network environment and route path
Routing rules	Decide which path different requests take	Mistaking a rule-match issue for a disconnected node	Check the mode, rules, and final egress

Shadowsocks, VMess, Trojan, VLESS, Hysteria2, and TUIC are protocols or transport schemes that a client may recognize, but the subscription link itself is none of them. The link delivers configuration; the protocol establishes the actual connection. A client being able to open a subscription does not mean it supports every protocol field in it. When fields are incompatible, nodes may disappear, be marked invalid, or fail only during connection.

Bottom line: A successful import only means the client read the configuration. For it to work, the protocol must be supported, authentication must be valid, the route must be reachable, the system proxy or tunnel must be active, and routing rules must be correct.

Where to get one and how to verify the source

A reliable source should be the subscription or client-download section in the service dashboard. After signing in, copy the system-generated link or use the dashboard’s client-import action. Do not look for similarly named links in search results, forwarded messages, or so-called configuration bundles; matching node names do not prove that the configuration came from the original service.

Keep the full URL when copying it. Chat apps may collapse long text, browsers may strip parameters, and leading or trailing spaces can make the token incomplete. If the dashboard offers both a universal subscription and client-specific formats, choose the format for your current client whenever possible instead of relying on a third-party conversion site.

✅ Open the subscription or client-download section from the signed-in service dashboard.
✅ Confirm that the domain matches the current service, then copy the complete link.
✅ Prefer a subscription format the client can recognize directly.
✅ After importing, verify that node names, protocols, and groups are all present.
❌ Do not paste the link into online decoding, conversion, or speed-test pages.
❌ Do not save screenshots containing the complete link or its QR code.

How to import a subscription into clients on each platform

Client interfaces vary, but the import process can be broken into the same checkpoints: confirm the compatible format, create a subscription entry, update it manually, choose a node, enable the system proxy or tunnel, and verify the egress. Do not skip the first update: some clients save only the URL when a subscription is created and do not fetch its contents immediately.

Windows and macOS

Open the client’s subscription, configuration, or profile-management page.
Choose Add from URL and paste the complete link copied from the dashboard into the input field.
Give the subscription an easy-to-recognize local name; do not put the token in the name.
Save it, run an update, and confirm that the expected routes and protocols appear in the list.
Choose a node and operating mode, then enable the system proxy or system tunnel.
Open an IP-check page and inspect the DNS results to confirm that traffic follows the expected routing rules.

Desktop clients commonly offer both system-proxy and virtual-network-adapter modes. A system proxy mainly handles apps that follow system proxy settings; virtual-adapter mode can cover more traffic but is more likely to conflict with security software, other network tools, or existing routes. If access still fails after importing the subscription, first confirm which traffic-handling mode the client is using.

Android and iOS

Copy the subscription link from the service dashboard, or transfer it directly between trusted devices.
Open the client’s configuration-management page and choose import from the clipboard, URL, or QR code.
Allow the client to create a system VPN configuration and confirm that the newly imported configuration is enabled.
Update the subscription manually and check whether the current version supports its protocols.
After connecting, test destinations that should use the proxy and destinations that should connect directly, then verify the routing results.

Mobile platforms usually take over traffic through the system VPN interface. Power-saving features, network changes, or background restrictions may pause the client, so “the node exists but disconnects later” does not necessarily mean the subscription has expired. Return to the client to check the tunnel status and error log before deciding whether to update the subscription.

Linux and router devices

A Linux client may provide a graphical interface or read configuration files directly. Before importing, confirm that the core supports the protocols and transport fields in the subscription. Routers also require attention to storage, kernel capabilities, DNS forwarding, and LAN routing; a complete configuration that works on desktop may not fit a router environment unchanged.

After updating a subscription on a router, confirm that the rules have been reloaded rather than merely downloading a new file. If the old process is still running, the interface may show new nodes while the actual connection continues using the old configuration. Use the device’s normal management flow to apply the configuration or reload the service; do not repeatedly import the same link.

Platform differences: On desktop, focus on the proxy-handling mode; on mobile, check the system tunnel and background status; on Linux and routers, focus on core compatibility, DNS forwarding, and configuration reloads.

How often should you update?

There is no universal fixed update interval for subscriptions. When node names, endpoints, authentication parameters, or groups change, the service publishes new configuration; the client must fetch it again to see those changes. Conversely, when the connection is stable and the service has not changed, refreshing frequently will not make the route faster.

A more practical approach is event-based updating: update after the first import; after the service dashboard announces route changes; when several nodes show authentication or resolution errors at once; and after switching devices or reinstalling the client. If one node is temporarily unreachable, first try another route in the same subscription instead of assuming the entire subscription has expired.

A client’s “automatic update” usually just means periodically requesting the remote link. It does not fix incompatible protocols or choose routing rules for you. If the client stays asleep, is restricted in the background, or has an incorrect system time, the automatic update may not run. In that case, manually refresh it and check the update timestamp rather than repeatedly toggling the connection.

How to troubleshoot a failed update

When an update fails, distinguish between “the subscription could not be retrieved” and “it was retrieved but could not be parsed.” The first is commonly caused by an incomplete link, an invalid token, DNS issues, or a network that cannot reach the subscription endpoint. The second is more often related to client format, protocol fields, configuration syntax, or client version.

Check the original link. Return to the service dashboard and copy it again. Do not add characters manually or keep using an old link from chat history.
Check the subscription endpoint. Determine whether the client reports a failed network request, failed authentication, or an unrecognized content format.
Check client compatibility. Confirm that the current core supports the Shadowsocks, VMess, Trojan, VLESS, Hysteria2, or TUIC configuration in the subscription.
Clear the cache and retry. Delete the invalid local subscription entry first, then add it again from the dashboard; changing only its name will not refresh permissions.
Reduce network variables. Pause other proxy configurations to prevent an old system proxy, virtual adapter, or DNS tool from taking over the path.
Keep working configurations. Do not delete every working node during troubleshooting, or you may lose the connection needed to access the dashboard.

If the subscription updates but some nodes do not appear, focus on format and protocol support. Older clients may ignore unfamiliar fields, and different clients may use different names for policy groups, transport layers, and certificate settings. Do not use node visibility as the only test; check the logs for skipped parsing or unsupported fields.

If every node appears but none can connect, the problem is beyond the subscription-download stage. Check the system time, protocol handshake, UDP conditions on the current network, TLS domain, proxy mode, and local firewall. Hysteria2 and TUIC are more sensitive to UDP paths; Trojan and some VLESS configurations may depend on correct TLS parameters. Do not arbitrarily delete subscription fields to bypass errors, as this can make a configuration appear importable while preventing an actual connection.

The relationship between route types, protocols, and subscriptions

IEPL dedicated lines, relay routes, and direct connections describe network paths, not subscription formats or protocol names. A direct connection typically reaches the remote endpoint through the local network; a relay enters an intermediate endpoint before reaching the target region; an IEPL dedicated line emphasizes a specific cross-border transport path. The client still needs the endpoint and protocol parameters from the subscription to use these routes.

Changing the subscription format therefore will not turn a direct connection into a dedicated line, and changing the protocol will not automatically change the service’s physical path. The protocol determines how the connection is encapsulated, authenticated, and transported; the route type determines which network segments the data crosses. When investigating evening fluctuations, observe path quality and client protocol separately.

Routing rules are a separate layer. They can send local services directly, route international websites through a selected node, or choose an egress by domain, IP, or application. If a rule matches incorrectly, the result may differ from expectations even when the node itself works normally. Check which rule matched the current request instead of updating the subscription whenever a destination does not use a node.

Checking DNS leaks and routing

Even after a subscription is imported, DNS may still be handled by the local network. This can result in an established connection while domain lookups take a different path. DNS leak checks focus on who handles the lookup requests and where they originate, not just the egress IP shown by a webpage.

When using a system proxy, some apps may continue using system DNS. With virtual-adapter mode, the client can usually take over resolution more completely, provided DNS settings and routing rules are correct. The browser’s own encrypted DNS, system cache, and LAN gateway can also affect the result.

✅ Compare the egress IP and DNS resolution source before and after connecting.
✅ Check that the client has enabled DNS settings compatible with the current mode.
✅ See whether the destination domain matched a proxy rule or a direct-connection rule.
✅ After changing rules, clear the local DNS cache and test again.
❌ Do not equate a changed egress IP with every DNS request being handled by the tunnel.
❌ Do not enable multiple competing system proxies and tunnel configurations at the same time.

If a website takes the wrong route, temporarily switch to global proxy mode for comparison. If global mode works but rule mode does not, the node and protocol usually work; the issue is likely rule matching or DNS resolution. After comparing, restore the required mode and fix the rules instead of using global mode indefinitely to hide a configuration error.

What to do immediately after a link leak

Deleting a link from the local client is not enough after it has been exposed. Deletion only clears the record on that device; it cannot stop anyone who copied the link from requesting the configuration. The correct response is to revoke the old subscription, reset the subscription link, or regenerate the access token in the service dashboard so the old address becomes invalid.

Stop sharing it. Delete the link from public messages, shared documents, and screenshots, but do not paste it into another platform to ask for help.
Revoke remote access. In the service dashboard, reset the subscription or update the token, then confirm that the old link no longer returns valid configuration.
Remove old local records. Delete the original subscription from every client so automatic updates stop requesting the old address.
Import the new link. Copy it again from the dashboard, update the configuration, and confirm that the nodes and protocols are complete.
Check other devices. Every device using the old subscription must be updated; handling only the current device is not enough.
Review routing and DNS. Re-importing may restore the client’s defaults, so verify the rules, system proxy, and resolution path again.

If the exposed content is only a single node configuration, update the related credentials using the method provided by the service dashboard. Do not assume no one is using the link, and do not rely on a changed node name to determine whether access was revoked. Renaming a node changes only its display name; updated authentication parameters determine whether the old configuration can still connect.

Final takeaway: Manage subscription links as revocable credentials. Verify the source when obtaining one, check protocol support and traffic handling after importing, distinguish downloading from parsing during updates, and after a leak revoke remote access before replacing the old configuration on every device.