How to Protect Your FiveM Server From DDoS Attacks & Exploits [2026]

Why FiveM Server Security Matters

A compromised or attacked FiveM server can go from thriving community to wiped data and zero players overnight. Whether it's a disgruntled player running a DDoS tool, a cheater crashing your server with a menu, or a developer exploiting your poorly written scripts — threats are real and constant.

If you're running a serious server, you will be targeted eventually. The question is whether you're prepared. Common attacks and exploits include:

• DDoS attacks flooding your server IP with junk traffic
• Cheat menus spawning vehicles, giving money, or crashing clients
• Event injection — players triggering server-side events they shouldn't have access to
• SQL injection through unsanitised player input
• Resource exploits — abusing script logic to duplicate items or currency
• Grief attacks — mass vehicle spawns, explosions, or world modifications
• Credential theft — weak txAdmin passwords or exposed config files

If your framework is what makes your server work, security is what keeps it working. This guide walks you through every layer of FiveM server protection — from network to code.

Why Server Security Should Be a Priority

Did you know? Every script on FiveVault is reviewed for security vulnerabilities before being listed. Poorly written or exploit-prone resources are rejected from the platform. Browse all verified scripts →

Prerequisites

Step 1: Hide Your Real Server IP With DDoS Protection

The single most effective DDoS defence is making sure attackers never learn your real server IP. Once your real IP is known, basic DDoS protection is mostly useless.

The best FiveM hosts offer built-in DDoS mitigation at the network level — traffic gets scrubbed before it ever reaches your server machine. Look for hosts that specifically advertise FiveM DDoS protection or game server protection.

Providers with strong FiveM DDoS protection include:

• OVH / OVHCloud — industry standard, free DDoS mitigation on all plans
• Hetzner — excellent EU option with good mitigation
• ZAP-Hosting — popular FiveM host with built-in DDoS protection
• NFO Servers — long-standing game server host with mitigation

# In server.cfg — use a proxy or reverse tunnel if possible
# Do NOT share your server IP in Discord or public announcements
# Use your server's domain name, not the raw IP

Pro tip: If your server IP has already been exposed and you're being attacked, contact your host to request an IP change. Many providers offer this for free once per billing period.

Step 2: Lock Down Your server.cfg

Your server.cfg contains sensitive variables that — if misconfigured — can expose your server to attacks. Lock these down immediately:

# Disable debug convars — never leave these on in production
sv_scriptHookAllowed 0        # blocks ScriptHook — required for most cheat menus
sv_enableNetworkedSounds 0    # prevents networked sound exploits

# Enforce ACE permissions on all sensitive commands
add_ace group.admin command.restart allow
add_ace group.admin command.stop allow
add_ace group.admin command.ensure allow
add_ace builtin.everyone command.restart deny
add_ace builtin.everyone command.stop deny

# Restrict RCON access
rcon_password "YourVeryStrongPasswordHere123!@#"

# Lock server info
sv_hostname "Your Server Name"
sets tags "roleplay, esx, serious"

Step 3: Secure Your Events Against Injection

-- server/main.lua
RegisterNetEvent('myScript:giveMoney')
AddEventHandler('myScript:giveMoney', function(amount)
    local xPlayer = ESX.GetPlayerFromId(source)
    xPlayer.addMoney(amount)   -- player can send any amount they want
end)

-- server/main.lua
RegisterNetEvent('myScript:giveMoney')
AddEventHandler('myScript:giveMoney', function(amount)
    local src = source
    -- Validate the amount server-side — never trust client input
    if type(amount) ~= 'number' or amount <= 0 or amount > 1000 then
        return  -- reject invalid or exploited values silently
    end
    local xPlayer = ESX.GetPlayerFromId(src)
    if not xPlayer then return end
    xPlayer.addMoney(amount)
end)

Pro tip: Audit every RegisterNetEvent in your scripts. If a client-triggered event modifies player money, inventory, or jobs without server-side validation — it's exploitable. This is the #1 source of economy-destroying bugs on FiveM servers.

Step 4: Install an Anti-Cheat System

No server security setup is complete without a dedicated anti-cheat resource. Anti-cheat tools detect and ban players using trainers, mod menus, or injection tools in real time.

ensure [anticheat]/my-anticheat-resource

Most anti-cheat systems will auto-ban players detected using:

• Godmode / invincibility hacks
• Noclip & teleportation exploits
• Vehicle spawn menus
• Weapon modification tools
• Resource injectors

Pro tip: No anti-cheat is 100% effective — determined attackers can bypass most public solutions eventually. Use anti-cheat as one layer of a broader security strategy, not as your only defence.

Step 5: Sanitise All Database Inputs

If your server uses a database (and it should), SQL injection is a real threat. It happens when unsanitised player input gets passed directly into a database query — allowing attackers to read, modify, or delete your entire database.

local name = playerInput  -- player controls this value
MySQL.query('SELECT * FROM users WHERE name = ' .. name)

local name = playerInput
MySQL.query('SELECT * FROM users WHERE name = ?', { name }, function(result)
    -- safe — the ? placeholder prevents injection
end)

# In server.cfg — always use oxmysql
ensure oxmysql

Step 6: Set Up a Strong txAdmin Configuration

txAdmin is the most powerful tool on your server — and if it gets compromised, the attacker owns everything. Lock it down properly.

# At least 16 characters, mix of uppercase, lowercase, numbers, symbols
# Example: xV3!mP9@qL#rT2nZ
# Do NOT use your FiveM forum password or any reused password

1. Go to Settings → Admins in txAdmin
2. Add staff via their CFX forum username
3. Assign the lowest permission level they need to do their job
4. Audit your admin list monthly — remove ex-staff immediately

If your VPS provider supports it, restrict port 40120 to trusted IP addresses only via your firewall — so only you and trusted staff can reach the txAdmin panel.

# Example UFW firewall rule (Linux VPS)
ufw allow from YOUR.TRUSTED.IP to any port 40120
ufw deny 40120

Pro tip: If an ex-staff member had txAdmin access, change your master password immediately and regenerate your server license key via keymaster.fivem.net.

Step 7: Protect Your Economy From Exploit Abuse

Economy exploits — item duplication, money multiplication, job abuse — are the silent killers of FiveM servers. They don't crash your server; they destroy your community's trust in the economy over weeks.

-- ❌ Saving inventory on client disconnect alone is dangerous
-- A player can crash their client before the save fires

-- ✅ Save inventory server-side on a timer AND on disconnect
-- Never rely solely on client-triggered saves

-- Always validate job grade server-side before giving rewards
local xPlayer = ESX.GetPlayerFromId(source)
if xPlayer.getJob().name ~= 'police' then return end
-- Now safe to give police-only reward

-- Always add cooldowns to money transactions
-- Log every transaction to a database table for audit trail
-- Rate-limit how many times a player can withdraw per minute

Pro tip: Set up a Discord webhook that logs every large transaction (deposits, withdrawals, item gives over a threshold). If someone duplicates $500,000 in items, you'll know within minutes — not days.

Step 8: Monitor, Log & Respond

Security isn't set-and-forget. You need visibility into what's happening on your server at all times.

-- Log suspicious actions to a private Discord channel
-- Examples of what to log:
-- • Admin commands used
-- • Large money transactions
-- • Vehicle spawns above a threshold
-- • Players triggering events unusually fast (rate limit hits)
-- • Failed permission checks

• Review recent join history for ban evasion patterns
• Check hardware IDs of suspected ban evaders
• Set up automatic bans for flagged cheating behaviour

# Suspicious patterns in Live Console:
[WARNING] Rate limit exceeded for player "John" on event myScript:giveMoney
[ERROR] Player attempted to trigger admin event without permission
[INFO] Player "John" disconnected 47 times in 2 hours   ← crash exploit attempt

Security Checklist

Troubleshooting Common Security Issues

❌ Server goes offline randomly for 5–10 minutes then comes back

❌ Players are duplicating items or getting infinite money

❌ Banned player keeps coming back on new accounts

❌ txAdmin was accessed by an unauthorised person

❌ Players are triggering admin events from the client

❌ Database was modified or wiped

Recommended Security Resources

Final Tips

• ✅ Set sv_scriptHookAllowed 0 in server.cfg — blocks the majority of public cheat menus
• ✅ Never trust client input — validate everything on the server side, every time
• ✅ Use DDoS-protected hosting — network-level mitigation is your first and best line of defence
• ✅ Use parameterised queries with oxmysql — SQL injection is completely preventable
• ✅ Audit your admin list monthly — remove ex-staff the moment they leave your team
• ✅ Log everything suspicious to Discord — visibility is the foundation of good security
• ✅ Back up your database daily — if the worst happens, a backup is your only recovery option
• ✅ Source scripts from FiveVault — every resource is reviewed for security before listing

Frequently Asked Questions

A: No protection is 100% absolute, but high-quality DDoS mitigation from providers like OVH can absorb attacks large enough to take down most FiveM servers. The goal is to make attacks too costly and ineffective to bother with.

A: A DDoS typically shows as a sudden spike in inbound traffic visible in your host's monitoring dashboard, followed by all players disconnecting simultaneously. A crash shows as a Lua error or exception in your txAdmin console.

A: Not necessarily for small servers. Free solutions like Badger Anti-Cheat provide a solid baseline. Paid anti-cheat is worth investing in once your server reaches 30+ concurrent players and becomes a target.

A: Use hardware ID (hwidToken) bans via txAdmin instead of license-only bans. hwid bans survive account changes and are the most effective ban method available on FiveM.

A: Whitelisting significantly reduces random exploit attempts and DDoS motivation. The trade-off is slower player growth. Many serious RP servers use whitelisting as both a security and quality-control measure.

A: Take the server offline. Restore your database from the most recent clean backup. Audit your admin accounts and remove anyone suspicious. Rotate your license key and txAdmin master password. Then investigate the root cause before bringing the server back online.