Call of Duty: United Offensive Server Guide

📋 Quick Info

Server Specifications

Game: Call of Duty: United Offensive (2004 Expansion)
Platform: Linux / Windows
Default Port: 28960/UDP
Max Players: 64 (typical: 32-64)
Control Protocol: RCON
Executable (Linux): coduo_lnxded
Executable (Windows): CoDUOMP_s.exe

🔌 Ports & Firewall Configuration

Call of Duty: United Offensive servers require specific ports to be open for proper operation:

Port	Protocol	Purpose	Required
28960	UDP	Game port (default, configurable)	Yes
28960	TCP	RCON remote control (optional)	Optional
20500-20510	UDP	PunkBuster (if enabled)	Optional

Firewall Examples

UFW (Ubuntu/Debian):

sudo ufw allow 28960/udp comment 'CoDUO Game Port'
sudo ufw allow 28960/tcp comment 'CoDUO RCON'
sudo ufw allow 20500:20510/udp comment 'CoDUO PunkBuster'

FirewallD (CentOS/RHEL/Fedora):

sudo firewall-cmd --permanent --add-port=28960/udp
sudo firewall-cmd --permanent --add-port=28960/tcp
sudo firewall-cmd --permanent --add-port=20500-20510/udp
sudo firewall-cmd --reload

iptables:

sudo iptables -A INPUT -p udp --dport 28960 -j ACCEPT
sudo iptables -A INPUT -p tcp --dport 28960 -j ACCEPT
sudo iptables -A INPUT -p udp --dport 20500:20510 -j ACCEPT

⚙️ Installation & Setup

System Requirements

OS: Linux (Debian, Ubuntu, CentOS) or Windows Server 2016+
CPU: 2+ cores recommended
RAM: 2GB minimum, 4GB recommended
Disk: 5GB for base game + expansion + space for logs
Network: Low latency connection, 10Mbps+ bandwidth

Linux Installation

Download Server Files: Obtain Call of Duty: United Offensive dedicated server files
Create Server Directory:
mkdir -p ~/coduoserver cd ~/coduoserver
Extract Files: Extract server files to the directory
Set Permissions:
chmod +x coduo_lnxded
Create Configuration: Create server.cfg in the main directory

Windows Installation

Install Call of Duty: United Offensive dedicated server files
Create a server.cfg file in the main directory
Ensure Windows Firewall allows the game ports
Run CoDUOMP_s.exe with appropriate parameters

📝 Configuration

Basic server.cfg Example

// Server Name
set sv_hostname "My CoD:UO Server"

// Network Settings
set net_ip "0.0.0.0"
set net_port 28960

// Server Type (1=LAN, 2=Internet)
set dedicated 2

// Player Limits
set sv_maxclients 32

// RCON Password
set rcon_password "your_secure_password_here"

// Game Settings
set g_gametype "dm"    // dm, tdm, sd, ctf, hq, bel, dom
set sv_maxPing 350
set sv_minPing 0

// PunkBuster (0=off, 1=on)
set sv_punkbuster 1

// Map Rotation
set sv_mapRotation "gametype dm map mp_foy gametype tdm map mp_rhinevalley gametype dom map mp_ponyri"

// Password Protection (leave empty for public)
set g_password ""

// Friendly Fire
set scr_friendlyfire 1

// Kill Cam
set scr_killcam 1

// Game Log
set g_log "games_mp.log"
set g_logsync 1

// Voice Chat
set sv_voice 1
set voice_deadChat 0
set voice_global 0

// Anti-Lag
set sv_fps 20

// Downloads
set sv_allowDownload 1

// UO-Specific: Tanks and Vehicles
set scr_allow_tanks 1
set scr_allow_vehicles 1

🚀 Startup Parameters

Parameter	Description	Example
+set dedicated	Server mode (1=LAN, 2=Internet)	+set dedicated 2
+set net_ip	Bind to specific IP address	+set net_ip "0.0.0.0"
+set net_port	Server port (default: 28960)	+set net_port 28960
+set fs_basepath	Base installation directory	+set fs_basepath "/home/user/coduo"
+set fs_homepath	Config and log directory	+set fs_homepath "/home/user/.callofdutyuo"
+set fs_game	Mod folder (if using mods)	+set fs_game "mods/mymod"
+set sv_punkbuster	Enable PunkBuster (0=off, 1=on)	+set sv_punkbuster 1
+exec	Execute config file on startup	+exec server.cfg
+set rcon_password	RCON password for remote admin	+set rcon_password "secret123"
+set sv_maxclients	Maximum player slots	+set sv_maxclients 32
+map_rotate	Start map rotation from server.cfg	+map_rotate

Example Startup Command (Linux)

./coduo_lnxded +set dedicated 2 +set net_ip "0.0.0.0" +set net_port 28960 +set sv_maxclients 32 +set sv_punkbuster 1 +exec server.cfg +map_rotate

Example Startup Command (Windows)

CoDUOMP_s.exe +set dedicated 2 +set net_ip "0.0.0.0" +set net_port 28960 +set sv_maxclients 32 +set sv_punkbuster 1 +exec server.cfg +map_rotate

🔧 Troubleshooting

Server Not Appearing in Browser

Issue: Players cannot see the server in the in-game browser.

Solutions:

Verify +set dedicated 2 is set (not 1 for LAN)
Ensure UDP port 28960 is open in firewall
Check master server connectivity (may be limited for older games)
Verify server is online: ps aux | grep coduo
Try direct connect using IP:PORT

Server Crashes on Startup

Issue: Dedicated server crashes immediately after launch.

Solutions:

Check games_mp.log for error messages
Verify all required game files and expansion files are present
Ensure server.cfg syntax is correct (no typos)
Remove custom mods temporarily to isolate issue
On Linux, verify 32-bit libraries: sudo apt-get install lib32gcc1
Check file permissions: chmod +x coduo_lnxded

Connection Problems

Issue: Players cannot connect or timeout.

Solutions:

Verify firewall rules allow traffic on game port
Check sv_maxPing setting (increase if players have high latency)
Ensure server is not full (sv_maxclients)
Disable password if testing: set g_password ""
Verify client and server game versions match (must have UO expansion)

High Lag/Ping Issues

Issue: Players experience significant lag.

Solutions:

Increase sv_fps setting (recommended: 20)
Reduce sv_maxclients if server is overloaded
Check server CPU and RAM usage
Verify network bandwidth is sufficient
Lower sv_maxPing to restrict high-ping players
Disable vehicles/tanks on large maps if performance is poor

RCON Not Working

Issue: Cannot connect via RCON.

Solutions:

Verify rcon_password is set in server.cfg
Ensure TCP port 28960 is open (in addition to UDP)
Use correct RCON syntax: /rcon login password then /rcon command
Test RCON from server console first

🎮 Game Types

Call of Duty: United Offensive supports the following game modes:

dm - Deathmatch (Free-for-all)
tdm - Team Deathmatch
sd - Search & Destroy
ctf - Capture the Flag
hq - Headquarters
bel - Behind Enemy Lines
dom - Domination (NEW in United Offensive)

🗺️ Default Maps

United Offensive includes these multiplayer maps (in addition to original CoD maps):

New UO Maps

mp_foy - Foy (Belgium, Battle of Bastogne)
mp_ponyri - Ponyri (Russia, Battle of Kursk)
mp_rhinevalley - Rhine Valley (Germany)
mp_sicily - Sicily (Italy)
mp_kursk - Kursk (Russia, large tank map)

Original CoD Maps (Also Available)

mp_brecourt, mp_carentan, mp_chateau, mp_dawnville, mp_depot
mp_harbor, mp_hurtgen, mp_neuville, mp_pavlov, mp_powcamp
mp_railyard, mp_rocket, mp_ship, mp_tigertown

Popular server modifications compatible with Call of Duty: United Offensive:

B3 (Big Brother Bot) - Python-based admin bot with RCON wrapper, player warnings, ban management, statistics tracking, and automated moderation for Call of Duty servers

📚 Resources

Official Documentation: Limited (expansion released 2004)
Community Forums: Various Call of Duty dedicated server communities
RCON Tools: B3, CoD RCON utilities
Key Features: Tanks, jeeps, mobile spawn points, base assault mode

Important Notes

United Offensive is an expansion pack for Call of Duty (2003) - players must have both the base game and expansion to connect
United Offensive introduced drivable vehicles and tanks to Call of Duty multiplayer
The new Domination game mode was first introduced in this expansion
Vehicle-heavy maps like Kursk require more server resources than infantry-only maps
Uses RCON protocol (old type) for remote administration
PunkBuster is optional but recommended for anti-cheat protection
Always secure your RCON password and restrict access to trusted administrators only

Call of Duty: United Offensive Server Guide

📋 Quick Info

Server Specifications

🔌 Ports & Firewall Configuration

Firewall Examples

⚙️ Installation & Setup

System Requirements

Linux Installation

Windows Installation

📝 Configuration

Basic server.cfg Example

🚀 Startup Parameters

Example Startup Command (Linux)

Example Startup Command (Windows)

🔧 Troubleshooting

Server Not Appearing in Browser

Server Crashes on Startup

Connection Problems

High Lag/Ping Issues

RCON Not Working

🎮 Game Types

🗺️ Default Maps

New UO Maps

Original CoD Maps (Also Available)

🔌 Related Mods & Plugins

📚 Resources

Important Notes