Hardening Your FiveM server.cfg
Your server.cfg is the front door to your FiveM server. A few directives set correctly keep it secure, performant, and easy to manage; a few set wrong invite trouble.
The essentials
Set endpoint_add_tcp/endpoint_add_udp for your port, sv_hostname for the browser name, sv_maxclients for slots, and sv_licenseKey from the FiveM keymaster. The FiveM server.cfg Generator writes a fully commented, security-minded config for you.
OneSync and slots
Vanilla FiveM caps you at 32 players. To go higher you must enable OneSync (onesync on), which also adds server-side state awareness that many modern scripts depend on. Set your slot count and OneSync together or the extra slots will not work.
Secure RCON, keys, and permissions
Never leave rcon_password blank or shared, and keep your license key and any Steam web API key out of public repos. Grant staff powers with ACE permissions rather than blanket admin: build add_ace/add_principal lines with the FiveM ACE Permissions Generator.
Load order
Resources start in the order they are ensured. Put frameworks and shared dependencies before the resources that rely on them, or you will chase startup errors that are really ordering problems.
Try the tools
All guides →FiveM server.cfg Generator
Build a fully commented, security-hardened server.cfg with admins, resources, and OneSync.
Launch tool →FiveM ACE Permissions Generator
Build add_ace and add_principal lines for FiveM server.cfg permissions.
Launch tool →fxmanifest.lua Generator
Build a FiveM/RedM resource manifest with the right fields and script blocks.
Launch tool →