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How to Set Up BattlEye Filters on an Arma 3 Server

By Freedom251 Team · · 12 min read

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To set up BattlEye filters on an Arma 3 dedicated server, enable BattlEye, put mission-specific plain-text filter files in the active profile’s BattlEye directory, begin with logging rules, and tighten only the exact strings that your logs confirm are abusive. The directory is normally created inside the server profile directory, but custom profile and startup parameters can move it. A filter that works for one mission or mod collection can produce false kicks on another, so copying a generic filter pack unchanged is unsafe.

What BattlEye filters control

BattlEye filters are server-side text rules that watch classes of script and command activity. When a line matches, its leading action number tells BattlEye how to handle the match. The documented form is an action number from 1 through 7, one space, and a keyword or phrase. The exact action behavior belongs to BattlEye’s filter documentation; do not assume that a number means the same thing in every context without checking the version you run.

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A match can appear to a player as a BattlEye “restriction” kick. That message means a BattlEye filter detected activity covered by a rule; it does not, by itself, prove that the player intentionally cheated. Mission frameworks, scripted vehicles, remote calls, and mod updates can all change the strings that a legitimate client sends. The useful response is to read the corresponding server log, identify the precise match, and adjust only the necessary rule.

Arma 3 also has a separate CfgRemoteExec configuration. It determines which commands, functions, and targets may be remotely executed. BattlEye’s remoteexec.txt filter adds another layer. A remote call can therefore be allowed by one layer and denied by the other, so troubleshooting must examine both.

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Requirements and decisions before editing

  • A running Arma 3 dedicated server with access to its active profile directory.
  • Permission to edit the server configuration, profile files, and firewall rules.
  • Access to BattlEye logs and the server console.
  • A way to stop, start, or otherwise reload the server safely, plus a rollback copy of the current files.
  • The exact mission and mod set that players will use. Filter content must be written for those scripts, not for an abstract “vanilla” server.

Decide where the server’s profile is actually being loaded before creating files. Startup parameters and custom profile settings can change the default location. A filter saved in an unused profile can look perfectly valid while the running server ignores it.

Find the active BattlEye working directory

Arma 3 normally creates the BattlEye directory beneath the server profile directory. The active profile is the one selected by the server’s configuration and startup parameters, not necessarily the directory beside the executable or the profile you last edited.

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  1. Open the server configuration and confirm that BattlEye is enabled with BattlEye = 1.
  2. Check the startup parameters for a custom profile or profile path. Record the path used by the process that is currently running.
  3. Inside that active profile, locate the BattlEye working directory. Existing log files are a useful sign that you have found the directory the server is using.
  4. If more than one profile exists, stop the server briefly and verify the process or startup configuration rather than guessing from folder names.

When filters appear to have no effect, this location check is the first diagnostic step. Confirm BattlEye is enabled, the files are in the active profile’s BattlEye directory, and the server is using the startup parameters you inspected.

Back up the profile and filter files

Before changing a rule, copy the entire active BattlEye directory and the relevant profile configuration to a dated backup. Keep the original filenames and encoding. A new rule can kick every player in a mission, and a quick rollback is safer than trying to reconstruct a working file while the server is busy.

  • Use a timestamp in the backup name so you can identify which mission and mod set it represents.
  • Save a copy of the startup/profile settings that determine the active directory.
  • Change one logical rule at a time and record the reason, date, mission, and mod versions.
  • Never treat deleting a filter file as a permanent fix for a false positive; preserve a baseline and create a narrow exception instead.

Choose the filter files your mission needs

Filter files are ordinary text files whose names correspond to monitored command or script classes. Create only the files relevant to your server. A maintained filter collection commonly includes the following names:

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File Activity covered by the file name When to inspect it
scripts.txt Script-check activity When a scripted action or mission framework produces a restriction
remoteexec.txt Remote execution calls When functions or commands sent across the network are blocked or logged
createvehicle.txt Vehicle and object creation When legitimate or suspicious spawning is reported
deletevehicle.txt Vehicle and object deletion When cleanup scripts or unexpected deletion trigger a match
mpeventhandler.txt Multiplayer event-handler activity When a mission’s event handlers are flagged
publicvariable.txt Public variable names When networked variables appear in BattlEye logs
publicvariableval.txt Public variable values When a value, rather than only a variable name, is reported
remotecontrol.txt Remote-control activity When a client attempts to control another entity or unit remotely
selectplayer.txt Player-selection activity When selection changes are logged
setdamage.txt Damage-setting commands When scripted damage changes are matched
setpos.txt Position-setting commands When teleport, spawn, or scripted movement is involved
setvariable.txt Variable-setting commands When mission or mod code sets a variable
setvariableval.txt Variable values When a value-specific match is logged
teamswitch.txt Team-switch activity When players or scripts change controlled units
waypointcondition.txt Waypoint conditions When waypoint condition text is reported
waypointstatement.txt Waypoint statements When waypoint statement text is reported

The list is not a requirement to create every file. The mission and mods determine which classes are active. Bohemia Interactive’s guidance is explicit that filters need to be written specifically for each mission and mod because their scripting differs.

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Write a valid rule

Use the action-and-keyword format

Each rule starts with an action number from 1 to 7, followed by a space and the keyword:

5 B_MRAP_01_
5 "some phrase"

The examples show syntax only, not a universal recommendation for action number 5 or either keyword. A prefix such as B_MRAP_01_ can cover a family of class names, but it may also match a legitimate variant you did not anticipate. Test a prefix against normal mission behavior before using a stronger action.

Quote phrases that contain spaces

Put a phrase containing spaces inside quotation marks. Keep the quotation marks in the text file. If the logged string includes punctuation or a longer surrounding expression, match the smallest stable portion that distinguishes the abusive activity from legitimate activity.

Escape regular-expression metacharacters where supported

Ordinary BattlEye filters treat characters such as ^, $, ., |, ?, *, +, (, ), [, ], and { or } as regular-expression metacharacters. Escape them when you intend to match the literal character. The important exception is scripts.txt: it does not support regular expressions, so do not apply regex assumptions to that file.

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For a literal match, copy the relevant text from the log carefully, then remove only the variable portion that must be generalized. A rule that is too broad can match an entire mission system; a rule that is too narrow may miss the abusive variation.

Build filters in logging mode first

Start with normal gameplay

Begin with logging actions while the server runs the real mission and mod set. Have administrators exercise ordinary gameplay: spawning mission-approved objects, using scripted interactions, changing positions through legitimate systems, and invoking expected remote functions. This establishes which strings are normal on your server.

Read the matching log entry

When BattlEye records a match, capture the filter file, the exact string, the player or network context shown, the mission, and the time. Compare repeated entries rather than reacting to one line in isolation. A mod update can alter capitalization, parameters, class-name prefixes, or serialized values without changing the visible feature.

Tighten one exact condition

After confirming that a string is abusive or impossible for the mission’s legitimate code, change only that rule to a stronger action. Leave unrelated rules at their previous setting. Restart or reload using the method supported for that file, then reproduce the event in a controlled test. There is no universal threshold for an acceptable rule: scripting differs between missions and mods.

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Keep a change log with the original line, the replacement line, the reason for the change, and the test result. This makes a later rollback or mod-update adjustment precise instead of forcing you to disable the whole filter.

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Handle remote execution in both configuration layers

Remote execution is governed by two mechanisms. The mission’s CfgRemoteExec configuration controls which commands, functions, and targets are allowed. BattlEye’s remoteexec.txt independently filters remote-execution strings. The more local Arma configuration takes precedence in this order: mission description, then campaign, then game or mod configuration.

  1. Identify the exact command or function in the BattlEye log.
  2. Check the active mission’s CfgRemoteExec policy, including allowed targets and functions.
  3. Check campaign and game/mod configurations if the mission does not define the relevant setting.
  4. Inspect the matching remoteexec.txt rule and its action.
  5. Test the legitimate call again before changing an exploit-related rule.

If the BattlEye line looks correct but a legitimate remote call still fails, the Arma configuration may be denying it. Conversely, allowing a function in CfgRemoteExec does not override a BattlEye filter match.

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Configure RCon separately and securely

RCon is the administrative channel used for commands such as reloading a script filter. It is configured separately from the filter files in beserver.cfg, or in beserver_x64.cfg when the server uses the 64-bit configuration. Place the file in the active BattlEye working directory.

  1. Set a private RConPassword that is not reused for the game panel, operating-system account, or another service.
  2. Set RConPort if you need a specific port. It must be different from the game server’s reserved ports.
  3. Set RConIP only when your deployment requires a particular bind address.
  4. Allow the selected port through the firewall only for trusted administrator addresses where practical.
  5. Do not publish the password in a panel screenshot, chat message, repository, or support ticket.
  6. Connect from an administrator client and verify that commands reach the same server profile whose files you edited.

If RCon cannot connect, verify the active BattlEye directory, filename, password, port, firewall rule, bind address, and the requirement that the RCon port sit outside the game-port range.

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Reload filters and verify the result

Reloading scripts.txt

BattlEye documents the RCon command loadScripts for loading scripts.txt without restarting the server. After saving the file, issue that command through the secured RCon connection, confirm that the server accepts it, and watch the log while a controlled test exercises the relevant script.

Other filter files

Do not assume that every filter file supports the same live-reload command. Use the restart or reload workflow supported by your server management setup for the file you changed. If a restart is required, announce a maintenance window, preserve the backup, and verify that the process starts with the intended profile parameters.

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Use a controlled verification test

  1. Record the file and rule changed.
  2. Run a test mission containing the legitimate behavior that previously produced the log entry.
  3. Confirm that the expected behavior works and that the log no longer records an unwanted match.
  4. Trigger a known test string or administrator-controlled event where safe, and confirm that the intended action occurs.
  5. Observe real players for a complete mission cycle before applying the same rule to a larger public population.

Diagnose common BattlEye filter problems

Players receive a restriction after a mod update

Compare the complete logged string with the rule that matched it. Mod updates frequently change class names, parameters, or generated script text. Add a narrow mission-specific exception or revise the exact prefix after testing; do not delete every protection rule simply because one legitimate action changed.

A scripts.txt pattern behaves unexpectedly

Remove regex assumptions. That file does not support regular expressions. Match the literal script text supported by the file’s syntax, and test whether punctuation, spacing, or a generated value changes between runs.

A remote call fails even though the BattlEye rule looks right

Inspect the active mission’s CfgRemoteExec, then its campaign and game/mod fallbacks, together with remoteexec.txt. The local configuration can deny a call before the BattlEye rule is relevant, or BattlEye can deny a call that Arma otherwise permits.

Filters appear to be ignored

  • Confirm BattlEye = 1 in the configuration actually loaded by the running server.
  • Confirm the files are plain text and are in the active profile’s BattlEye directory.
  • Check startup parameters for a different profile path.
  • Verify the exact filename, including spelling and extension.
  • Reload or restart using the supported procedure for that file.
  • Watch a fresh log entry while testing; an old log cannot prove that a new file was loaded.

RCon will not connect

Check that beserver.cfg or beserver_x64.cfg is in the active BattlEye directory, the password matches, the port is open to your administrator address, the bind address is correct, and the port is outside the game server’s reserved range. Also make sure your RCon client is pointed at the same host and port that the server is listening on.

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A rule causes widespread false kicks

Restore the dated backup or revert only the changed line, then return the rule to logging while you collect normal mission behavior. Broad prefixes and catch-all strings are the usual cause. Replace them with the smallest stable abusive string confirmed by the logs.

Operating practices that keep filters maintainable

  • Keep separate filter sets for materially different mission and mod combinations.
  • Version-control or archive every change with the server build, mission, mod versions, and date.
  • Review logs after every major mod or mission update before enabling stronger actions.
  • Use a staging or password-protected test instance for new rules whenever possible.
  • Give administrators a documented rollback procedure and access to the latest known-good backup.
  • Limit RCon to trusted administrators and rotate its password when staff access changes.
  • Review disk usage so verbose logging does not silently fill the profile volume.
  • Do not publish filter contents that reveal private server details, administrator credentials, or security-sensitive exceptions.

Self-hosted versus managed server requirements

The important distinction is not a provider name; it is whether the service gives you the controls BattlEye administration requires. Compare any deployment using the following criteria:

Requirement Why it matters Question to ask a host or administrator
Access to the BattlEye working directory Filters and RCon configuration must be edited in the active profile. Can I view and edit the actual profile’s BattlEye files?
Custom profile and startup parameters The default directory can change when profiles or startup settings are customized. Can I see and change the parameters that select the active profile?
RCon port and firewall control RCon needs a non-conflicting port and restricted network access. Can I choose the port and limit its firewall sources?
Log access Safe tuning depends on seeing the exact matched string. Can I download or stream BattlEye and server logs?
Backups and rollback A false-positive rule must be reversible quickly. Can I create and restore dated profile backups?
Restart and reload controls loadScripts can reload scripts.txt, while other changes may require a restart. Can authorized administrators reload or restart on demand?

A managed service that hides the profile directory, logs, firewall, or startup parameters may prevent reliable filter maintenance even if it advertises BattlEye support.

Quick deployment checklist

  1. Set BattlEye = 1 in the configuration used by the running server.
  2. Identify the active profile from the startup parameters and locate its BattlEye directory.
  3. Back up the directory and profile configuration with a date and mission/mod label.
  4. Create only the plain-text filter files relevant to the mission.
  5. Write action number plus keyword rules, quote phrases with spaces, and escape regex metacharacters where the file supports regex.
  6. Remember that scripts.txt does not support regular expressions.
  7. Run logging rules during normal gameplay and inspect the exact BattlEye entries.
  8. Tighten only confirmed abusive strings and test legitimate behavior after each change.
  9. Check CfgRemoteExec and remoteexec.txt together for remote-call problems.
  10. Secure RCon in beserver.cfg or beserver_x64.cfg, use a private password, and keep its port outside the game-port range.
  11. Use loadScripts for a supported live reload of scripts.txt; restart or use the supported workflow for other files.
  12. Keep logs, backups, and a rollback record for every production change.

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