A subscription link is an entry point for a client to retrieve route configurations, not an ordinary web page for everyday browsing. After you import it into a compatible client, the client requests the remote configuration, parses recognized nodes and parameters, and saves them locally. When you select “Update Subscription,” it essentially requests the same entry point again and syncs the configuration currently provided by the service.

The short version: get the subscription link from the user panel, then use the client’s “Import from URL” or “Add Subscription” feature. Never share the link publicly or assemble an address manually from an online example. A successful import only means the client received the configuration; it does not confirm that every node, protocol, routing rule, or target website has passed checks. After connecting, verify the network path, DNS, client mode, and the target service’s own requirements separately.

What’s the difference between a subscription link and a regular URL?

A subscription link may also begin with https://, so it can easily be mistaken for a regular web address. The difference is not the prefix, but the returned content and who consumes it: ordinary web pages are mainly rendered by browsers, while a subscription endpoint typically returns machine-readable configuration for a proxy client to parse. The response may be encoded or use YAML, JSON, or a provider-specific format. The exact format depends on the provider and client support, so you cannot determine it from the URL’s appearance alone.

Common links and configuration objects: what each is for
Object Primary use Typical handling What to watch for
Subscription link Retrieve and update route configurations in bulk Requested and parsed by a compatible client The link itself may grant access to configuration
Regular web URL Open instructions, a user panel, or a public page Content is rendered by a browser A page opening does not mean it can be imported as a subscription
Single-node share Import one specific configuration Protocol fields are identified by the client It does not automatically provide a complete route list
Local configuration file Store nodes, rules, and client options Imported from a file or read by the client Local changes may be replaced during a subscription update

A subscription link is not the same thing as a particular protocol. It is better understood as an entry point to a configuration container, whose contents may include nodes using Shadowsocks, VMess, Trojan, VLESS, Hysteria2, or TUIC. A client being able to download the subscription does not mean it can parse every protocol inside it. Even when nodes appear, the active core may not support the required transport, encryption parameters, or congestion-control options.

The right order for getting and importing a subscription

Get the subscription entry from the user panel associated with your account. The panel shows the configuration entry currently available to that account and makes it possible to reset the link if it is exposed. Do not start with an old address from chat history, a search result, text extracted from a screenshot, or someone else’s forwarded content: you cannot confirm that it still belongs to your account or that it has not been truncated or altered.

  1. Open the user panel. Sign in with your account and look for the retrieval entry in the subscription or client section. Creating a VPNFD account does not require an email address, but you should still store your username and password securely.
  2. Check the client’s source and capabilities. First confirm that the client supports your operating system, the subscription format, and the protocols used in the subscription. Do not rely solely on whether the interface has an “Import” button.
  3. Copy the complete link. Avoid dropping trailing characters, adding line breaks, or copying explanatory text along with it. Do not remove query parameters just to make the URL look cleaner.
  4. Choose subscription import. In the client, use “Add Subscription,” “Import from URL,” or an equivalent option—not the single-node server field.
  5. Run the first update. After saving, let the client request the configuration and check for a route list, protocol parsing errors, or request-failure messages.
  6. Choose a route and connect. Once the import is complete, choose a route based on region, path, and actual network behavior, then check the target website and account requirements.

If the client offers separate options for “Local Configuration,” “Remote Configuration,” and “Subscription Providers,” read the field descriptions first. Software does not use these terms identically: some clients convert a remote subscription into an internal configuration, some preserve the remote-provider relationship, and others let you combine a node subscription with local routing rules. Similar names do not guarantee the same update behavior.

Why protocol compatibility determines the import result

Protocol compatibility has two layers: being able to recognize a configuration and being able to connect with it. When a client recognizes VMess or VLESS fields, that only means its parser understands the configuration structure. Establishing a connection also depends on whether the client core supports the transport method, TLS parameters, and server requirements. Trojan generally relies on TLS semantics; Shadowsocks requires matching encryption and authentication parameters on both sides; Hysteria2 and TUIC are built around QUIC concepts and are more sensitive to UDP availability and network conditions. The presence of a protocol name in the list does not prove that the current network is suitable for it.

A subscription may also include remarks, groups, multipliers, or policy names. These are configuration metadata, not protocol capabilities. If a route name mentions a “dedicated line,” “relay,” or a region, rely on the provider’s published route information and actual path checks rather than inferring the physical path from the node name alone.

IEPL, relay, and direct connections compared

A direct connection usually means the client connects straight to the target node entry point, with the path mainly affected by the local carrier, international interconnection, and destination network. A relay adds a forwarding entry point between the user and the exit, aiming to change part of the public path or improve interconnection quality, but the final result still depends on local access and the relay link. IEPL is commonly used for international Ethernet private-line connections. Its network organization differs from ordinary public-internet direct connections and relays, but the subscription format cannot establish whether a product uses that type of route end to end.

A subscription link delivers the configuration for “how to connect”; it does not prove a route’s commercial bandwidth, physical topology, or the capabilities of a third-party platform. Compare routes by observing actual paths, stability, and the target use case—not by treating a remark field as technical evidence.

What changes when you update a subscription

Updating a subscription means the client requests the remote configuration again. The server may change route entry points, node remarks, protocol parameters, or group contents, and the client may consequently add, remove, or replace local entries. Do not assume a fixed update schedule: some clients update only when you trigger them manually, some support automatic updates, and others are limited by background execution, system power saving, or network permissions.

Pay close attention to the difference between “replace” and “merge.” Replace mode generally substitutes the original subscription content with the remote result; merge mode may retain some local fields; provider mode may manage remote nodes and local rules separately. If you directly edit a subscription-generated node name, server field, or protocol parameter, those changes may disappear after the next update.

Understand routing rules separately from node subscriptions

Routing rules determine which requests use the proxy path, which stay direct, and which are blocked. Depending on the client, rules may match domains, IP addresses, processes, or rule sets. A node subscription answers “which connection configurations are available?”; routing answers “how should traffic choose a path?” Some subscriptions include policy groups or rules, but you should not assume every subscription contains a complete routing configuration.

When a website will not open, first check whether a rule mistakenly classified it as direct, then check whether the selected policy group points to an available node. If the browser, system, and client each use different proxy settings, some requests may use the proxy while others bypass it. During troubleshooting, reduce overlapping configurations and identify whether traffic is being handled by the system proxy, TUN mode, or an in-app proxy.

DNS leaks and connection checks

A DNS leak usually means domain lookups are handled by the system, router, browser’s encrypted DNS, or a resolver on the local network instead of following the intended resolution path. It does not necessarily make a site completely inaccessible: a common case is that the web connection uses the proxy while DNS queries still use the local network, creating inconsistent regional detection, unusual resolution results, or a privacy boundary different from what you expected.

Do not check only the public exit address. Also verify the client’s DNS mode, system network settings, the browser’s independent DNS settings, and whether routing rules are consistent. TUN mode can usually take over more system traffic but requires the relevant system permissions. System proxy mode mainly affects applications that follow proxy settings, while some programs or DNS requests may bypass it. Terms such as “Remote DNS,” “Local DNS,” and “Rule DNS” are not standardized across clients; follow the specific documentation.

If nodes appear after an update but cannot connect, troubleshoot in this order: request the subscription, parse the configuration, choose a node, establish the transport, resolve the domain, and access the target. This separates subscription-entry failures, client protocol incompatibility, current route problems, and target-service restrictions, instead of repeatedly deleting configurations without locating the cause.

Differences between clients on each platform

Windows clients can usually switch between system-proxy and virtual-network-adapter modes. During troubleshooting, confirm whether the application follows the system proxy and whether the virtual network adapter driver is working correctly. On macOS, full traffic takeover often depends on system network-extension permissions; even after a successful import, traffic may not be handled if those permissions are disabled.

Android background limits and power-saving policies may stop connections or subscription updates. After switching networks, also confirm that the VPN configuration is still active. iOS clients are constrained by system network extensions and app capabilities, and supported protocols and subscription formats vary between clients, so a configuration file from another platform should not automatically be treated as interchangeable.

Linux environments vary more widely: desktop clients, command-line cores, service processes, and containers may read configuration from different locations. When using a command-line core, distinguish its native configuration from a configuration converted from a subscription. Conversion tools add another parsing stage, so a failure may occur during the remote request, format conversion, or core loading.

When using the service across devices, you can import the subscription allowed for the same account on each device, but do not store the link in a publicly shared sync document. VPNFD plans have no device limit. Even so, check each platform’s client protocol support, permission status, and update method, because identical configuration content does not mean identical operating-system behavior.

What to do after a link is exposed

A subscription link may contain a token used to identify an account’s configuration. Anyone who obtains it may be able to request that configuration. If you find it in a public screenshot, browser sync record, public document, code repository, or uncontrolled device, do not merely delete the public copy—also invalidate the old entry.

  1. Stop sharing it. Delete copies of the link from public pages, shared documents, and messages, and check for screenshots or exported files.
  2. Reset the subscription entry in the user panel. After generating a new entry, use the actual status shown in the panel as the source of truth for the old link; do not keep trying to reuse it.
  3. Update trusted devices. Delete the old subscription or replace the remote address, then update and confirm that the client is reading the new configuration.
  4. Clear local traces. Check clipboard managers, terminal history, browser download records, configuration backups, and cloud-synced documents.
  5. Check the account status. If you notice unusual use or cannot complete the reset, submit a support ticket through the user panel with the details.

Do not treat “hiding the node name” as leak response. A node remark is usually not an access credential; the items that truly need protection are the complete subscription entry and any configuration that can be imported directly. Changing only the display name in the client also does not change the access status of the remote entry.

Troubleshooting order for import failures

When import fails, the most effective approach is to identify the layer where the error occurs. A request-timeout message usually calls for checking the local network and subscription request first. A format-error message calls for checking whether the copy is complete and whether the client supports the returned format. If the update succeeds but some nodes are missing, check protocol support and parsing logs. If nodes can be selected but the target website remains inaccessible, investigate the route, DNS, routing rules, and target-service requirements.

If you must provide logs to support staff, first remove the subscription address, authentication fields, and anything that could reconstruct node configurations. Keep only the time, error type, client version, operating system, and reproduction steps. Logs should identify the failure layer, not become another channel for spreading the subscription entry.

The complete process can be summarized as: retrieve the link from the panel, import it into a compatible client, check protocol parsing, verify routing and DNS after connecting, update manually when needed, and reset it immediately if exposed. Mapping each step to a clear failure layer is usually more effective than repeatedly switching clients or nodes.