Set server to custom difficulty. go to the server profile somewhere in the file manager and edit it to look similar to this (Got this from the antistasi dedicated server guide)
difficulty="custom";
class DifficultyPresets
{
defaultPreset="custom";
class CustomDifficulty
{
class Options
{
reducedDamage=0;
groupIndicators=1;
friendlyTags=0;
enemyTags=0;
detectedMines=0;
commands=1;
waypoints=0;
weaponInfo=1;
stanceIndicator=1;
staminaBar=1;
weaponCrosshair=0;
visionAid=0;
squadRadar=1;
thirdPersonView=1;
cameraShake=1;
scoreTable=0;
deathMessages=1;
vonID=0;
mapContent=0;
autoReport=1;
multipleSaves=0;
};
aiLevelPreset=3;
};
class CustomAILevel
{
skillFriendly=1;
skillEnemy=1;
precisionFriendly=0.30000001;
precisionEnemy=0.30000001;
};
};
singleVoice=0;
maxSamplesPlayed=96;
version=1;
blood=1;
gamma=1;
brightness=1;
sceneComplexity=1000000;
shadowZDistance=100;
viewDistance=3400;
preferredObjectViewDistance=2000;
terrainGrid=3.125;
volumeCD=10;
volumeFX=10;
volumeSpeech=10;
volumeVoN=10;
vonRecThreshold=0.029999999;
Obviously you won't need all of it so just type in the stuff you need.