Dedicated Server – Arma 3

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m (changed example from A3MP to CUP as it has mostly superseded it)
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====Case sensitivity & Mods====
====Case sensitivity & Mods====
Some mods such as @ALiVE and @A3MP will not function if there are capital letters in any of their file names. If you do not update your mods on a regular basis, you can just use the command
Some mods such as CUP Terrains and @ALiVE will not function if there are capital letters in any of their file names. If you do not update your mods on a regular basis, you can just use the command
<code>find . -depth -exec rename 's/(.*)\/([^\/]*)/$1\/\L$2/' {} \;</code>
<code>find . -depth -exec rename 's/(.*)\/([^\/]*)/$1\/\L$2/' {} \;</code>
in the directory where your mods are located. This will recursively search the directory tree and make all the filenames lowercase.
in the directory where your mods are located. This will recursively search the directory tree and make all the filenames lowercase.

Revision as of 19:30, 18 January 2019

Arma 3 logo black.png

WORK IN PROGRESS

Introduction

This page contains useful information on how to install and configure an ARMA 3 server and includes step by step guides of the install process. Also information on how to configure and run a server. The majority of directories and paths are customizable, however those defined are all consistent with the tutorial instructions.

Much of the tutorial here was created using this guide from the forums http://forums.bistudio.com/showthread.php?147537-Tutorial-How-to-run-ArmA3-on-a-dedicated-server

Note on steamCMD utility: if you are using it on a dedicated host to install and update Arma 3 dedicated server, it is a good practice to create a separate steam account for that. Arma 3 Dedicated server package is available for free (does not require regular Arma 3 to be purchased).

Installation

Requirements

  1. Steam Account
  2. Supported Operating System
    • Windows: 2008 or later
    • A Modern Linux Distro
  3. Minimum Hardware:
    • CPU:
    • RAM:
    • Disk

Instructions (Windows o/s)

The following instructions will guide you through setting up one Arma 3 server on 1 box, however they will also set the foundations for installing multiple servers on that same box

  1. Install the latest version of DirectX
  2. Create the following empty directories
    • D:\Apps\Steam
    • D:\Games\ArmA3\A3Master
    • D:\Games\ArmA3\A3Files
  3. Download steamcmd.exe and save it to your targetted Steam install directory (E.g D:\Apps\Steam)
  4. Run the steamcmd.exe. (This will download and install the required steam files to your custom steam directory)
  5. Create an #Arma3server_steamcmd_example.cmd file and save it to D:\Games\ArmA3\A3Files
  6. Run the #Arma3server_steamcmd_example.cmd file
  7. Just after logging into Steam, the console window will hang and ask for a validation key
    • Steam will have automatically sent you an email with this validation code, which you then need to input at the command prompt
    • The Update console window should then continue to run and install ArmA3 ((DEV or STABLE) version to the target directory as defined in the .cmd file) eg (D:\Games\ArmA3\A3Master)
  8. Create a shortcut for the ArmA3Server.exe on the server desktop
  9. Add the following parameters to the Target Line in the shortcut tab of the newly created desktop shortcut
    • -port=2302 (Required if running multiple server instances including any previous ArmA2 instances)
    • "-profiles=d:\Games\Arma3\A3Master"
    • -config=CONFIG_server.cfg
    • -world=empty
      • so it looks something similar to the following
      • "D:\Games\Arma3\A3Master\arma3server.exe" "-profiles=d:\Games\Arma3\A3Master" -port=2302 -config=CONFIG_server.cfg -world=empty
  10. Setup the #Port Forwarding in your firewall or\and router accordingly, also doesn't seems like implemented in some routers Port Trigger feature works with Arma 3 Server (tested with ASUS RT-N66U)
  11. Make sure you have:
    • Network Discovery enabled for your network type (the setting can be found in [Control Panel\Network and Internet\Network and Sharing Center\Advanced sharing settings]. If you have problem with it's state reset on the interface reopen, check if all of the required for this feature services are running: DNS Client, Function Discovery Resource Publication, SSDP Discovery, UPnP Device Host; (makes server accessible from internet) (maybe its about the services and not the network discovery)
    • Windows Media Player Network Sharing Service enabled (makes server joinable) ;

If you can't connect to server trough server browser try to use "direct connect": this is client side (doesn't mean other clients will have it too), reason for the issue for now unknown, i can say it is not related to: windows services, windows network settings, network routers,firew..;

Device Host; (note: Changes to the above 2 settings require Arma relaunch to be applied, as for server same for client machines;) 

Create a simple Notepad document called "CONFIG_server.cfg" and save it to the root folder of your ArmA3 install on the server D:\Games\ArmA3\A3Master
  1. Start up your shortcut, check the server runs. (You will see a console pop up in your desktop after a few seconds)
  2. Close the console window down, then you will need to edit the following files which will have been automatically created
    • D:\Games\Arma3\A3Master\Users\Adminstrator\Administrator.Arma3Profile
    • D:\Games\Arma3\A3Master\Users\Administrator\Arma3.cfg
  3. Restart the server
  4. Start up your client Arma3.exe (Running the same branch as the server, (eg Stable or DEV) and you should then be able to see your server in the server browser (Filters are available to reduce the server list)
  5. Login to your server using the password you defined in #CONFIG_server.cfg by typing "/" to open the chat window and then type (#login ADMINPASSWORD) followed by enter 
    Warning: Make sure you never forget the '#' in front of any server command!
  6. Once logged in you will be presented with a mission list, select one of the missions to start the game
  7. Prove the stability of your server by running BIS missions initially before you start adding user made content

Instructions (Linux o/s)

Installation

As a security best practice, create a user to run steam instead of running as root or an administrator. This way, if your ArmA server is compromised the attacker will find it more difficult to access the rest of the operating system. useradd -m -s /bin/bash steam

Switch to the newly created steam user. sudo -i -u steam

Create a new directory for SteamCMD to avoid cluttering the home directory. mkdir ~/steamcmd && cd ~/steamcmd

Download the SteamCMD for Linux tarball from the link at the Valve Developer Community page. Use a command line download tool such as wget or curl.

Extract the tarball. tar xf steamcmd_linux.tar.gz

Execute steamcmd.sh. It will install the rest of the Steam client and start the Steam client shell. If this step fails on a 64-bit OS, you likely need to install 32-bit libraries. ./steamcmd.sh

At the Steam client shell, login with a valid Steam username and password. The Valve Developer Community Wiki recommends that you create a new Steam account for this. SteamCMD will cache the login credentials and anyone who gains access to your server will be able to log into the account used here. In addition, you cannot log into a single Steam account from two places at once. You do not need to have Arma 3 purchased on the Steam account used here to download the server. Therefore, you should create a new Steam account with no purchases only for use on this server. login myusername

Change the directory SteamCMD will install the server in. force_install_dir ./arma3/

Install the Arma 3 Linux dedicated server. The validate option will check for corruption. app_update 233780 validate

Exit SteamCMD. exit

Create the directories used to store the profile files and Arma3.cfg file. mkdir -p ~/".local/share/Arma 3" && mkdir -p ~/".local/share/Arma 3 - Other Profiles"

Updating

You will have to update the server whenever a patch is released on Steam.

If the server is running, stop it by pressing Ctrl+C in the terminal (or screen/tmux instance) that the server is attached to. Otherwise, switch to the steam user. sudo -u steam -i

Launch steamcmd. cd /home/steam/steamcmd ./steamcmd.sh

Login to the Steam account used in the installation section above. login myusername

Set the ArmA 3 installation directory to the same directory used above. force_install_dir ./arma3/

Update the Arma 3 Linux dedicated server. The validate option will check for corruption. app_update 233780 validate

Exit SteamCMD. exit

Configuration

You will most likely want to customize your server's name, password, security settings, and so on with a server.cfg file. Change to the arma3 directory and create and edit your server.cfg file. cd ~/steamcmd/arma3 vim server.cfg If you don't know how to use vim, use nano instead. nano server.cfg See server.cfg for documentation and examples.

The first time you run the server it will auto-create a profile file at ~/.local/share/Arma 3 - Other Profiles/server/server.Arma3Profile. Edit this file to customize difficulty settings. NB: the -profiles= parameter is broken on Linux - you must place your profiles in this directory.

Launching

A Linux executable is provided to launch the server. Make sure that you are running it under the steam user and not root or another administrator! cd /home/steam/steamcmd/arma3 ./arma3server -name=server -config=server.cfg

NB: If you are using the -mod= parameter, you must specify relative paths within or below the Arma 3 directory. Symlinks will work.

The arma3server process will attach to the current terminal. If you are connected to the server over SSH, the server will stop when you disconnect. You can keep the server running using a terminal multiplexeer like GNU Screen or tmux. There are many tutorials online on how to use these programs to detach and reattach processes from and to a terminal.

You can safely stop the server by pressing Ctrl+C in the terminal (or screen/tmux instance) that the server is attached to.

Case sensitivity & Mods

Some mods such as CUP Terrains and @ALiVE will not function if there are capital letters in any of their file names. If you do not update your mods on a regular basis, you can just use the command find . -depth -exec rename 's/(.*)\/([^\/]*)/$1\/\L$2/' {} \; in the directory where your mods are located. This will recursively search the directory tree and make all the filenames lowercase.

If you regularly update your mods using, e.g. ArmA3Sync, you will find that this will redownload any files/folders that have changed case every time you run it. The solution to this is to use a package called "ciopfs" - Case Insensitive On Purpose Filesystem. You should first run the "find . -depth..." command mentioned above on your mod folder. Then, make an empty directory outside of the mods directory, e.g. mods_caseinsensitive. You then mount the directory with ciopfs mods mods_caseinsensitive and tell ArmA3Sync to synchronise in the mods_caseinsensitive directory. Once it has finished, you can unmount the directory with fusermount -u mods_caseinsensitive You should find that all of the files in the original mods directory are lowercase.

WORK IN PROGRESS

Additional Info

Useful Links

Further Reading

Tools

  • Arma3 Server Monitor
  • Firedeamon
  • ArmA3 server using TA2DST Method
    • A You-Tube video tutorial by Kirkwood364 which uses Tophe's Arma 2 Dedicated Server Tool to administer and run an A3 server
    • (Links for all the files required are available in the 1st comment of his You-Tube video)
  • arma3server for Linux
    • arma3server is a command line tool for quick, simple deployment and management of a ARMA 3 Linux dedicated server.

Useful Addons

File Locations

Some files are automatically created when you use certain commandline parameters Some files have to be created manually. If you have followed the instructions accurately, you will now have the following files and directories in addition to the clean install

  • d:\Games\Arma3\A3Master\ Users\Administrator\Administrator.Arma3Profile (Difficulty settings)
  • d:\Games\Arma3\A3Master\ Users\Administrator\Administrator.vars.Arma3Profile (Some binarised content which you cannot edit)
  • d:\Games\Arma3\A3Master\ Users\Administrator\Arma3.cfg (Bandwidth settings)
  • d:\Games\Arma3\A3Master\ MPMissions\ This is where custom made mission.pbo's need to be placed)
  • d:\Games\Arma3\A3Master\ arma3.rpt (Debug Log, automatically created every time the arma3server.exe is started)
  • d:\Games\Arma3\A3Master\ CONFIG_server.cfg (Manually created)
  • d:\Games\ArmA3\A3Files\ Arma3server_steamcmd_example.cmd (Manually created)
  • d:\Apps\Steam\

Port Forwarding

Arma 3 uses the same default ports as Arma 2 with the addition of several ports. So if you intend running A2 and A3 servers on the same machine, you need to edit the ports used. Default ports are all UDP and as follows
Incoming:

  • 2302 (default Arma 3 Game port) + (VON is now part of main gameport due to NAT issues)
  • 2303 (STEAM query, +1)
  • 2304 (Steam port, +2)
  • 2305 (VON port, +3 - not used atm. but allocated)
  • 2306 (BattlEye traffic, +4)

Outgoing:

DST Port Proto Destination Comment
2344 TCP+UDP 81.0.236.111 BattlEye - arma31.battleye.com
2345 TCP 81.0.236.111 BattlEye - arma31.battleye.com
2302-2306 UDP any Arma Server to Client Traffic
2303 UDP any Arma Server STEAM query port
2304 UDP any Arma Server to STEAM master traffic



To define the ArmA3 Game port used, state -port= **** in your command line arguments (Where *** is the new initial Arma 3 Game eg 2302)

and to define your Steam ports add the following lines to your CONFIG_server.cfg (editing the actual port numbers as required) 

// STEAM ports are now linked to game-port as +1 for query and +2 to-master

If you are running multiple servers, i would suggest the following format

SERVER 1
2302 UDP (gameport + VON)
2303 UDP (STEAM query port)
2304 UDP (STEAM master port)
2305 UDP (VON reserved port but not used atm.)
2306 UDP (BattlEye traffic port)
so open ports 2302-2306
... and leave at least 100 ports between the next 2nd server set

SERVER 2
2402 UDP (gameport + VON)
2403 UDP (STEAM query port)
2404 UDP (STEAM master port)
2405 UDP (VON reserved port but not used atm.)
2406 UDP (BattlEye traffic port)
so open ports 2402-2406
... and leave at least 100 ports between the next 3rd server set etc.

NAT traversal

UPnP allows you to automatically create port forwarding on your router to bypass NAT (UPnP enabled routers are required). The functionality can be easily enabled in server config as described in the server.cfg page.

Configuring for stable or Dev branch

Edit the Arma3server_steamcmd_example.cmd as defined below then run it

  • To select Development version
SET A3BRANCH=107410 -beta development
  • To select stable build (Dedicated server package)
SET A3BRANCH=233780 -beta
  • To select stable build (Full client\server package)
SET A3BRANCH=107410

Important Feature Since 12th March 2013 the development branch and the stable branch versions are no longer compatible. this means:
Only DEV clients can connect to a DEV server
Only Stable clients can connect to stable servers

Advanced Configuration

WORK IN PROGRESS

Bandwidth Optimisation

WORK IN PROGRESS

Multiple Server configuration

There are various methods available to run multiple Dedicated Arma 3 servers on the same box. Each server instance requires

  • Its own unique set of ports
  • Its own profile
  • Its own config

This Post explains it more in depth

Each method has some pro's and cons To select the preferred methodology that suits your requirements you need to have considered the following

  • The useage of the "Keys" folder
  • The useage of the "MpMissions" folder
  • Available Hard drive space
  • Update management

METHOD 1

see THIS POST for more detailed information This is copy of the master install into a different directory As may times as you have space for

Pros

  • Most robust
  • Unique MpMissions folder
  • Unique "keys" folder
  • Allows ability to run seperate instances of different branches of the game, (E.g Dev or Stable)

Cons

  • Uses more drive space
  • Requires more effort to create and automate the updating process

METHOD 2

This uses 1 master install folder and has renamed arma3server.exe's in sub folders of the master see THIS POST for more detailed information

Pros (Compared to Method 1)

  • Uses less space than Method 1
  • Updating will be easier

Cons (Compared to Method 1)

  • Not very Robust
  • Shares MpMissions folders with all the other exe's (Will create a very cluttered MpMissions folder and allows admins to select addon required missions for a mod this server instance isn't running
  • Shares "keys" folder with all other exe's (This can cause an issue when running various differing -mod servers)
  • Will not allow you to run seperate instances of different branches of the game

METHOD 3

This is a hybrid of method 1, in that it is essentially a "Virtual" copy of the master install in a different directory the difference being that many folders are sim linked to the initial Master directory simlink GUI:

Pros (Compared to Method 1)

  • Uses less drive space (As you wont have multiple copies of the addons folder)
  • Allows for unique MpMissions folder if desired
  • Allows for unique "keys" folder if desired
  • Updating will be easier

Cons (Compared to Method 1)

  • Requires more effort to initially create the simlinks and directories
  • Will not allow you to run seperate instances of different branches of the game at the same time, (E.g Dev or Stable)

METHOD 4

You could of course mix n match all 3 methods to suit your specific requirements


Dedicated Server & Client configuration

The only known issue, is to make sure you start the server up before you start the steam client Failing to do this causes steam port issues and your client will not be able to connect to the server

Headless Client

New: See Arma 3 Headless Client for changes in headless clients (TODO: update this section accordingly)

--JacmacBrian (talk) 22:14, 23 February 2014 (CET)

A Headless Client can be used by missions to offload AI processing to a dedicated client, freeing up the dedicated server process from most AI processing. Thus more AI units can be spawned and the server process will be able to dedicate most of it's processing towards communication with the clients. For a Headless Client/Dedicated Server to function together efficiently, they both need to be connected to each other via extremely low latency and high bandwidth. Effectively, they need to be on the same LAN at least, but preferably running on the same computer.

Setup and Execution

  • Headless Client for ARMA 3 requires a valid active Steam account logged in to function (Dwarden Post)
  • A Headless Client is simply Arma3.exe run from the command line with parameters, for example:
arma3.exe -connect=localhost -port=2444 -client -nosound -password=some_server_password -name=HC -profile=HC -mod=@CBA_A3;@blah;@blah;@blah

In the example above, the headless client is running on the same host as the dedicated server. It uses a profile called HC and connects to the server with a password as required by the server (the password is for password protected servers, optional). The server in this example is running on port 2444, alter this to the port of your server.

  • The Headless Client profile needs to be created like any other profile in Arma 3 (Note: It is best if you name this profile HC)

No configuration of the profile is necessary, but after creation, edit HC.Arma3Profile located in C:\Users\yourusername\Documents\Arma 3 - Other Profiles\HC and add this line: 

battleyeLicense=1;

Alternatively, you can use the full Arma 3 client to connect to any multiplayer server with BattlEye enabled and accept the BattlEye License Agreement, which will do the same thing as manually editing HC.Arma3Profile.

Once the profile is ready, copy the profile directory to C:\Users\yourusername\Documents\Arma 3 - Other Profiles on the server (if the profile was not created on the server). If the profile was created on the server or is not going to run on the server and is already on the computer it is going to run on, then it is ready to go.

  • If the Headless Client is on the server, the server's cfg must have the local loopback address as seen below (e.g. A3Server.cfg):
localClient[]={"127.0.0.1"};
headlessClients[]={"127.0.0.1"};
battleyeLicense=1;

Dwarden suggests that battleyeLicense=1; be in the server's config, but it is unclear whether this is actually necessary. (Dwarden Post)

  • If the Headless Client is running in the same network or the same computer, the server's config has to have the address in localClient[]=x.x.x.x. This will allow the server to communicate with the Headless Client using unrestricted bandwidth. It is also required to add the adress to headlessClients[]={"x.x.x.x"};. Multiple headless clients at different addresses can be added:
localClient[]={"127.0.0.1", "192.168.1.10", "192.168.1.210"};
headlessClients[]={"127.0.0.1","192.168.1.10","192.168.1.210"};
battleyeLicense=1;

Headless Client on a Dedicated Server Notes

If the Arma 3 Headless Client and a Arma 3 Dedicated Server are running on the same Windows computer (VM or physical), it may be beneficial to set processor affinity to prevent execution intensive threads from being scheduled across the same (v)CPUs. The operating system will generally schedule threads efficiently, but manual CPU allocation is possible. This can be achieved by right-clicking on the process (e.g. Arma3Server.exe(*32)) in the processes tab of the Windows Task Manager and selecting Set Affinity.... Be aware that on a physical intel CPU, the odd numbered CPUs are Hyper-thread cores.

Note: You can use automated solution for affinity assign via batch file with commandline CMD /AFFINITY HEXvalue e.g. CMD /C START /AFFINITY 0xF3 arma3server.exe

It has been observed that although the ARMA server and client processes will kick off multiple threads, the bulk of processing is used up by only one or two threads. For example, spawning 50 AI units does not generate 50 threads. There is one thread in the process that handles all of the AI units, irrespective of how many have been spawned. In this way, the ARMA server and client processes do not make maximal use of the processing capability found in modern processors and so AI counts do not scale easily. As such, faster CPU core speed is king and offloading the AI to multiple headless clients on the same computer will probably produce the best possible results for complex missions involving many AI units (albeit an expensive way to get the results).

Read complete and detailed HOW-TO guide on Headless Client : https://community.bistudio.com/wiki/Arma_3_Headless_Client

Example Files

Arma3server_steamcmd_example.cmd

  • Standalone Server Package (no need for game ownership on STEAM account)
  • Note: you might be asked to authorize your STEAM account due to STEAMguard (check email)
  • Note: it needs to be ran two or three times (1st authorize, 2nd STEAMcmd update itself, (when done, quit), 3rd update the Arma 3 Server data package)
  • Note: STEAMcmd needs to be in separate folder from STEAMclient (so always use unique folder like "STEAMcmd") to avoid file conflicts
  • Note: Arma 3 server data package needs to be in separate folder from Arma 3 client (so always use unique folder like "A3server" or "Arma3server") to avoid file conflicts
  • Code:
@echo off
@rem http://media.steampowered.com/installer/steamcmd.zip
SETLOCAL ENABLEDELAYEDEXPANSION

       :: DEFINE the following variables where applicable to your install

    SET STEAMLOGIN=mylogin mypassword
    SET A3serverBRANCH=233780 -beta
        :: For stable use 233780 -beta
        :: For Dev use 233780 -beta development
                :: Note, the missing qotation marks, these need to be wrapped around the entire "+app_data......"
                :: There is no DEV branch data yet for Arma 3 Dedicated Server package !!!

    SET A3serverPath=D:\Games\ArmA3\A3Master
        SET STEAMPATH=D:\Apps\Steam

:: _________________________________________________________

echo.
echo     You are about to update ArmA 3 server
echo        Dir: %A3serverPath%
echo        Branch: %A3serverBRANCH%
echo.
echo     Key "ENTER" to proceed
pause
%STEAMPATH%\steamcmd.exe +login %STEAMLOGIN% +force_install_dir %A3serverPath% +"app_update %A3serverBRANCH%" validate +quit
echo .
echo     Your ArmA 3 server is now up to date
echo     key "ENTER" to exit
pause

CONFIG_server.cfg

//
// server.cfg
//
// comments are written with "//" in front of them.

// NOTE: More parameters and details are available at http://community.bistudio.com/wiki/server.cfg

// STEAM PORTS (not needed anymore, it's +1 +2 to gameport)
// steamPort       = 8766;     // default 8766, needs to be unique if multiple serves on same box
// steamQueryPort  = 27016;    // default 27016, needs to be unique if multiple servers on same box

// GENERAL SETTINGS
hostname       = "My Arma 3 Server";    // Name of the server displayed in the public server list
//password     = "ServerPassword";      // Password required to join the server (remove // at start of line to enable)
passwordAdmin  = "AdminPassword";       // Password to login as admin. Open the chat and type: #login password
maxPlayers     = 40;    // Maximum amount of players, including headless clients. Anybody who joins the server is considered a player, regardless of their role or team.
persistent     = 1;     // If set to 1, missions will continue to run after all players have disconnected; required if you want to use the -autoInit startup parameter

// VOICE CHAT
disableVoN       = 0;     // If set to 1, voice chat will be disabled
vonCodecQuality  = 10;    // Supports range 1-30; 1-10 is 8kHz (narrowband), 11-20 is 16kHz (wideband), 21-30 is 32kHz (ultrawideband); higher = better sound quality, more bandwidth consumption

// VOTING
voteMissionPlayers  = 1;       // Minimum number of players required before displaying the mission selection screen, if you have not already selected a mission in this config
voteThreshold       = 0.33;    // Percentage (0.00 to 1.00) of players needed to vote something into effect, for example an admin or a new mission. Set to 9999 to disable voting.
allowedVoteCmds[] =            // Voting commands allowed to players
{
	// {command, preinit, postinit, threshold} - specifying a threshold value will override "voteThreshold" for that command
	{"admin", false, false}, // vote admin
	{"kick", false, true, 0.51}, // vote kick
	{"missions", false, false}, // mission change
	{"mission", false, false}, // mission selection
	{"restart", false, false}, // mission restart
	{"reassign", false, false} // mission restart with roles unassigned
};

// WELCOME MESSAGE ("message of the day")
// It can be several lines, separated by comma
// Empty messages "" will not be displayed, but can be used to increase the delay before other messages
motd[] =
{
	"Welcome to My Arma 3 Server",
	"Teamspeak: ts.somewhere.com",
	"Website: www.example.com"
};
motdInterval = 5;    // Number of seconds between each message

// MISSIONS CYCLE
class Missions
{
	class Mission1
	{
		template = "MyMission.Altis"; // Filename of pbo in MPMissions folder
		difficulty = "Regular"; // "Recruit", "Regular", "Veteran", "Custom"
	};
};

// LOGGING
timeStampFormat  = "short";                 // Timestamp format used in the server RPT logs. Possible values are "none" (default), "short", "full"
logFile          = "server_console.log";    // Server console output filename

// SECURITY
BattlEye             = 1;    // If set to 1, BattlEye Anti-Cheat will be enabled on the server (default: 1, recommended: 1)
verifySignatures     = 2;    // If set to 2, players with unknown or unsigned mods won't be allowed join (default: 0, recommended: 2)
kickDuplicate        = 1;    // If set to 1, players with an ID that is identical to another player will be kicked (recommended: 1)
allowedFilePatching  = 1;    // Prevents clients with filePatching enabled from joining the server (0 = block filePatching, 1 = allow headless clients, 2 = allow all) (default: 0, recommended: 1)

// FILE EXTENSIONS
allowedLoadFileExtensions[] =       {"hpp","sqs","sqf","fsm","cpp","paa","txt","xml","inc","ext","sqm","ods","fxy","lip","csv","kb","bik","bikb","html","htm","biedi"}; // only allow files with those extensions to be loaded via loadFile command (since Arma 3 v1.19.124216) 
allowedPreprocessFileExtensions[] = {"hpp","sqs","sqf","fsm","cpp","paa","txt","xml","inc","ext","sqm","ods","fxy","lip","csv","kb","bik","bikb","html","htm","biedi"}; // only allow files with those extensions to be loaded via preprocessFile / preprocessFileLineNumbers commands (since Arma 3 v1.19.124323)
allowedHTMLLoadExtensions[] =       {"htm","html","php","xml","txt"}; // only allow files and URLs with those extensions to be loaded via htmlLoad command (since Arma 3 v1.27.126715)

// EVENT SCRIPTS - see http://community.bistudio.com/wiki/ArmA:_Server_Side_Scripting
onUserConnected     = "";    // command to run when a player connects
onUserDisconnected  = "";    // command to run when a player disconnects
doubleIdDetected    = "";    // command to run if a player has the same ID as another player in the server
onUnsignedData      = "kick (_this select 0)";    // command to run if a player has unsigned files
onHackedData        = "kick (_this select 0)";    // command to run if a player has tampered files

// HEADLESS CLIENT
headlessClients[]  = {"127.0.0.1"};    // list of IP addresses allowed to connect using headless clients; example: {"127.0.0.1", "192.168.1.100"};
localClient[]      = {"127.0.0.1"};    // list of IP addresses to which are granted unlimited bandwidth; example: {"127.0.0.1", "192.168.1.100"};

****.Arma3Profile

version=2;

viewDistance=3000;
preferredObjectViewDistance=3000;
terrainGrid=12.5;
activeKeys[]=
{
};


class Difficulties
{
    class recruit
    {
        class Flags
        {
            Armor=1;
            FriendlyTag=0;
            EnemyTag=0;
            MineTag=1;
            HUD=1;
            HUDPerm=1;
            HUDWp=1;
            HUDWpPerm=1;
            HUDGroupInfo=1;
            AutoSpot=1;
            Map=1;
            WeaponCursor=1;
            AutoGuideAT=1;
            ClockIndicator=1;
            3rdPersonView=1;
            UltraAI=0;
            CameraShake=0;
            UnlimitedSaves=1;
            DeathMessages=1;
            NetStats=1;
            VonID=1;
            ExtendetInfoType=1;
        };
        skillFriendly=0.6;
        skillEnemy=0.6;
        precisionFriendly=0.28;
        precisionEnemy=0.28;
    };
    class regular
    {
        class Flags
        {
            Armor=1;
            FriendlyTag=1;
            EnemyTag=0;
            MineTag=1;
            HUD=1;
            HUDPerm=1;
            HUDWp=1;
            HUDWpPerm=1;
            HUDGroupInfo=1;
            AutoSpot=1;
            Map=1;
            WeaponCursor=1;
            AutoGuideAT=1;
            ClockIndicator=1;
            3rdPersonView=1;
            UltraAI=0;
            CameraShake=1;
            UnlimitedSaves=1;
            DeathMessages=1;
            NetStats=1;
            VonID=1;
            ExtendetInfoType=1;
        };
        skillFriendly=0.6;
        skillEnemy=0.6;
        precisionFriendly=0.28;
        precisionEnemy=0.28;
    };
    class veteran
    {
        class Flags
        {
            Armor=0;
            FriendlyTag=0;
            EnemyTag=0;
            MineTag=1;
            HUD=1;
            HUDWp=1;
            HUDWpPerm=1;
            HUDGroupInfo=1;
            AutoSpot=0;
            WeaponCursor=0;
            ClockIndicator=1;
            3rdPersonView=1;
            UltraAI=0;
            CameraShake=0;
            DeathMessages=0;
            NetStats=1;
            VonID=1;
            ExtendetInfoType=0;
        };
        skillFriendly=0.6;
        skillEnemy=0.6;
        precisionFriendly=0.28;
        precisionEnemy=0.28;
    };
    class mercenary
    {
        class Flags
        {
            HUD=1;
            AutoSpot=0;
            WeaponCursor=0;
            DeathMessages=0;
            NetStats=1;
            VonID=1;
        };
        skillFriendly=0.6;
        skillEnemy=0.6;
        precisionFriendly=0.28;
        precisionEnemy=0.28;
    };
};

difficulty="veteran";

Arma3.cfg

See basic.cfg for more infos 

language="English";
adapter=-1;
MinBandwidth=800000;
MaxBandwidth=25000000;
MaxMsgSend=384;
MaxSizeGuaranteed=512;
MaxSizeNonguaranteed=256;
MinErrorToSend=0.003;
MaxCustomFileSize=100000;
Windowed=0;
serverLongitude=0;
serverLatitude=52;
serverLongitudeAuto=0;
serverLatitudeAuto=52;

Support & Troubleshooting

Known Issues

  1. My server has 2500ms ping in server browser (This is caused by running the steam client as Non Administrator) see http://feedback.arma3.com/view.php?id=9374
  2. MaxMsgSend default is 128, higher values can create Desync problems if the server's available processing and/or bandwidth can not support the higher value
  3. if you run Arma 3 Dedicated server data package on system where is also installed client there is possibility the server will load the full client data instead server data package,
    this is caused by precedence check in registry, the solution/workaround to this issue is to use arma3server.exe "-mod=" (where empty modline ensure it loads data from where server is placed)
  4. upnp=1; //in server.cfg may result into server not starting for 600 seconds on server with active firewalls / anti-ddos measures ,
    it's not recommended setting for dedicated-servers where server process related ports are open/forwarded by default
  5. using multiple server instances with too narrow ranges in between each (e.g. first 2302, second 2314) may cause problems with query where second server reports at first range,
    use of minimum +100 ports for next instance next to 2302 thus 2402 then 2502 etc. for utmost safety use +200 or +1000
  6. engine has legacy automated port increment system for occupied sockets (used for client-listen servers, upnp) where first is tried 2302, then +12 up to 15 times (so 2314, 2326 ... 2482)

Live Help

For Live help, join the Skype group channel 

Quote Originally Posted by Dwarden 
all server hosters, we have Skype channel for collaborative work of server admins http://forums.bistudio.com/showthread.php?131825-Skype-groups-amp-other-contact-groups ... thanks


Or join the official Arma 3 Discord server! https://discord.gg/arma

F.A.Q

WORK IN PROGRESS

See Also

ArmA Server Configuration

Multiplayer Server Commands

Server Options

Battleye's RCON

Arma 3's Headless client

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