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What BungeeCord IP forwarding does
A BungeeCord network has two connections for each player. The player connects to the proxy, and the proxy opens a second connection to the selected Spigot server. By default, the backend connection originates from the proxy, so the backend may identify the proxy as the connecting address instead of the player’s real address.
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That distinction affects bans, moderation tools, audit logs, permissions and player data. A network that uses address-based bans can otherwise ban the proxy rather than the player, while UUID-based data can appear under a different identity when a player moves between proxy-connected and directly connected contexts.
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Prerequisites and scope
- A working BungeeCord proxy with at least one Spigot backend.
- Access to the proxy’s generated
config.yml. - File access to
spigot.ymlon every backend that players can reach through the proxy. - Permission to stop and start, or otherwise restart, the proxy and each backend.
Use the file structure generated by the versions you installed. Keep unrelated settings intact; change only the forwarding entries unless you have another reason to edit the file.
The SpigotMC Wiki described BungeeCord #711 and later together with Spigot 1.7 #5 and later as requiring manual forwarding on both the proxy and Spigot. Those figures are historical context from the 2018 guide, not a guarantee of compatibility for every current BungeeCord fork, Spigot build or Paper-based server. Modern projects can change configuration names, defaults or supported forwarding modes, and there is no single compatibility matrix covering every combination.
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How the two-sided configuration works
| Component | File | Setting | Purpose |
|---|---|---|---|
| BungeeCord proxy | config.yml |
ip_forward: true |
Places the player’s original address and online-mode UUID into the proxy-to-backend connection. |
| Each Spigot backend | spigot.yml |
settings: bungeecord: true |
Tells Spigot to accept and use the forwarding data supplied through the BungeeCord path. |
Both flags describe one trust relationship. The proxy must send the data, and each backend must be configured to interpret it. Enabling only one side leaves the network incompletely configured and can produce the same symptoms as having forwarding disabled.
Step-by-step setup
1. Back up the configuration files
Before editing, make a copy of the proxy config.yml and every backend spigot.yml. A backup gives you a known rollback point if indentation changes, a version-specific format differs, or a later troubleshooting step requires returning to the previous state.
2. Enable forwarding in BungeeCord
- Stop the proxy if your installation requires it for safe file editing, and open the BungeeCord proxy’s
config.yml. - Find the top-level
ip_forwardentry. In a standard generated file, it should be a Boolean value rather than a quoted string. - Set it exactly as follows:
ip_forward: trueKeep the entry at the same indentation level used by the generated file. YAML is indentation-sensitive, so do not nest this key under listeners, servers or another section unless your installed configuration explicitly places it there.
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3. Enable BungeeCord mode on every Spigot backend
- Open
spigot.ymlon the first backend. - Under the existing
settings:section, setbungeecordtotrue:
settings:
bungeecord: trueDo not create a second settings: block if one already exists. Add or edit the key inside the existing block and preserve the rest of the file. Repeat this edit on every Spigot server that receives players through the proxy, including lobby, hub, minigame and fallback servers.
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4. Save and restart the complete network
Save the proxy file and all backend files. Restart the BungeeCord proxy and every Spigot backend; a plugin reload or a configuration-only reload is not a reliable substitute for restarting the processes. Restarting both sides ensures that the proxy loads its forwarding mode and each backend loads its acceptance mode before the next player connection is created.
If you run several backends, restart them all rather than testing one changed server while other servers still use the old configuration. A player moved between differently configured servers can otherwise appear to have inconsistent address or UUID information.
Configuration examples
Proxy config.yml
ip_forward: trueThis is a top-level proxy setting. Leave the listener, server list, permissions and other generated entries in place.
Each backend spigot.yml
settings:
bungeecord: trueThe snippet shows the required nesting, not a complete spigot.yml. Your file may contain many additional settings under settings:; change only the Boolean value for bungeecord.
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Verify that forwarding is actually working
Verification must follow the same route real players use. A direct connection to a backend bypasses the proxy and cannot prove that BungeeCord forwarding is configured correctly.
- Start the proxy and all configured backends after saving the files.
- Connect to the BungeeCord listener, not to a backend’s direct address.
- Join a backend through the proxy and identify which backend handled the connection.
- Use a server-side plugin or a server log that reports the connecting player’s address and UUID.
- Confirm that the reported address is the player’s actual address rather than the proxy address.
- Confirm that the UUID is the player’s online-mode UUID, not an offline-mode username hash.
- Repeat the check on each backend, because one server can still have an incorrect
spigot.ymleven when another server works.
Use a controlled test account where possible and record the result from the same connection path each time. A direct backend test, a proxy test and a test performed before a restart are different tests and should not be treated as interchangeable.
Troubleshooting by symptom
The backend still logs the proxy address
- Open the proxy’s
config.ymland verify that the active proxy instance hasip_forward: true. - Open
spigot.ymlon the specific backend handling the player and verifysettings.bungeecord: true. - Check for duplicate keys or an incorrectly indented entry. YAML parsers use the effective structure, not the position you intended.
- Confirm that both the proxy and that backend were restarted after the edit.
- Reconnect through the proxy listener and check the address again.
Do not assume that changing the proxy file fixes every backend. The acceptance flag is stored separately on each Spigot server.
The UUID is unexpected or player data appears under a second identity
Check both flags and the connection route. The proxy forwards the true online-mode UUID only when its forwarding option is enabled, and Spigot uses that data only when BungeeCord mode is enabled. A player who connected directly to a backend, or who connected before the complete restart, may have data created under a different identity. Test again through the proxy after both sides are running the new settings.
One backend works while another does not
Treat this as a per-backend configuration issue first. Compare the working and failing servers’ spigot.yml files, paying particular attention to the existing settings: block and indentation. Verify that the proxy’s server entry routes the test player to the backend you think it does, then restart the failing backend and retest through the proxy.
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The change appears to have no effect
- Make sure you edited the configuration directory used by the running process, not an archived copy or a different server instance.
- Check startup output for YAML parsing errors or a process that failed to restart.
- Ensure the value is the Boolean
true, not text with unusual quoting or capitalization. - Verify that your test connection enters through BungeeCord rather than using a saved direct backend address.
If a configuration error prevents startup, restore the backup, correct the indentation or key placement, and restart again. Do not remove unrelated settings while diagnosing a forwarding problem.
Security: forwarding is trusted identity data
Forwarding works because Spigot trusts the proxy path to supply the player’s address and UUID. That trust is appropriate only when backend connections are controlled. If an arbitrary Internet client can connect directly to a backend listener, it may bypass the proxy path or send traffic that the backend was not intended to accept.
Keep backend listener ports inaccessible to untrusted clients and allow connections from the proxy or a trusted private network. The exact firewall, bind-address and hosting arrangement depend on your operating system, provider and topology; there is no single universal firewall rule that fits every BungeeCord deployment. The important requirement is that normal players reach the backend through the proxy, while direct public access is blocked or otherwise restricted.
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After applying network restrictions, test from an ordinary player connection and from an administrator path used for maintenance. Ensure that staff still have a deliberate, documented way to reach a backend for console or maintenance work without exposing the gameplay listener to the public Internet.
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Apply the setting consistently
Forwarding is a network-wide policy, not a cosmetic option for the lobby. Every backend that can receive a proxied player should use the same intended mode. Keep a written inventory of backend names and configuration locations so a newly added server does not silently run with a different identity model.
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Understand what forwarding does not do
- It does not replace authentication or make a backend safe to expose publicly.
- It does not configure firewall rules, proxy listeners or server routing.
- It does not retroactively rewrite UUIDs or player records already created under another identity.
- It does not make a direct backend connection equivalent to a proxied connection.
Those are separate operational concerns. Forwarding supplies identity information during the proxy-to-backend handshake; it does not solve every networking or account-management problem around a proxy network.
Version context and proxy alternatives
The documented historical prerequisite was BungeeCord #711 or newer with Spigot 1.7 #5 or newer, as stated by the SpigotMC Wiki in 2018. Current BungeeCord forks and current Spigot or Paper releases may have different support details, defaults and security recommendations. Check the documentation for the exact proxy and server builds you operate before copying assumptions from an older guide.
When evaluating a different proxy technology, compare more than the name of the forwarding switch. The meaningful questions are which forwarding mode is used, how the backend authenticates or trusts forwarded data, whether backend configuration is required, how online UUIDs are handled, which server versions are supported, and how backend network isolation is enforced. The two-file procedure in this guide describes the legacy BungeeCord configuration model and should not be transplanted unchanged to another proxy.
Maintenance checklist
- Back up
config.ymland every backendspigot.ymlbefore edits. - Confirm
ip_forward: truein the active BungeeCord proxy configuration. - Confirm
settings.bungeecord: truein every relevant Spigot backend. - Preserve YAML indentation and avoid duplicate keys or duplicate
settings:sections. - Restart the proxy and all backends after saving.
- Test through the BungeeCord listener, never only through a direct backend address.
- Check both the reported address and UUID on each backend.
- Restrict backend listeners to the proxy or a trusted network.
- Recheck the settings whenever a backend is cloned, replaced or upgraded.
Bottom line
Correct BungeeCord IP forwarding is a coordinated proxy-and-backend change: ip_forward: true in the proxy, bungeecord: true under settings on every Spigot backend, a full restart, and a test made through the proxy listener. Once those pieces agree and backend ports are kept away from untrusted clients, Spigot can receive the player’s real address and online-mode UUID instead of the proxy address or an offline-mode identity.
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