Skip to main content
CZ Autoz / Callatic vehicles check that your server is licensed by looking up your server’s public IP address and port and comparing them against our whitelist. This is the same system the CZ Autoz helicopters use.
Each mod is whitelisted on its own. Every CZ Autoz mod — each pack, tier, single-vehicle car and the helicopter — has its own whitelist. Whitelist each mod you run with the #ip-whitelisting bot, or use submit-all to whitelist everything you own at once.
Two ways to whitelist — both in sync. Use the #ip-whitelisting bot in Discord, or the web whitelist manager (log in with Discord). They read and write the same whitelist, so use whichever you prefer. Every product includes 4 live server slots + 1 free test server (the test server needs no keyword and doesn’t use a slot).

What happens if a server isn’t whitelisted

On a server that is not whitelisted, the vehicles still spawn and stay in the world exactly as normal — players can walk up to them, open them, loot them and store gear in them. What they cannot do is start the engine: any attempt to start shuts the engine straight back off. Whitelist the server and the engines work from the next successful check onwards, with no restart needed.

Your port matters, not just your IP

The whitelist stores an IP address and a port together. Your server has to be running on the port you registered, and that port must be readable from the server’s launch parameters — so make sure -port is set in your start-up line. If the IP is registered but the port doesn’t match, the engines stay off and the log says NOT REGISTERED, showing the exact IP and port that were checked.

How to whitelist your server

1

Get your server's public IP and port

Use the public IP your server actually runs on (not your home connection), and the port it runs on. If you use a host or game-server panel, both are shown on the server’s page.
2

Open the whitelisting channel — or the website

IP Whitelisting Channel

Open #ip-whitelisting in the CZ Autoz Discord

Or use the website

Manage keywords, servers, your free test server and extra slots in your browser
3

Register with the bot

Follow the CZ Autoz Bot’s instructions in that channel to add your server. Once registered you don’t need to restart — a vehicle that failed its check tries again the next time someone turns the key, so just hop in and start a car. The check also repeats on its own in the background, and a server restart forces a fresh one.
If your server IP or port changes — switching hosts, a new box, a dynamic IP, or a new -port — you must re-whitelist, or the engines will stop starting until you do.

Checking your status — the whitelist log

Every CZ Autoz vehicle mod (and the helicopter mod) writes its whitelist status to a single shared log on your server:
The file is date-stamped, so each day gets its own log. Each line is timestamped and tagged with the mod, for example:
These are the results you may see:
The log is shared on purpose — instead of one file per mod, you get one place to confirm whether all your CZ Autoz content is whitelisted. It also resets itself once it passes 2,000 lines, so it can’t grow forever.

Requirements for the check to work

The check runs on the server and needs outbound internet access. The server needs to be able to reach:
  • czautoz.co.uk and czautoz.com over plain HTTP — this is where the licence check goes.
  • A public IP-lookup service — the mod tries several well-known ones in turn, so it only needs one of them to answer.
If your host blocks the game server’s outbound traffic, the check can’t finish and the engines stay off until it can. Most hosts allow this by default.
Built to be reliable. The check runs in the background, so it never holds up your server’s start-up. If it can’t reach us (a brief network blip or an ISP hiccup), that is treated as a network problem and not as a rejection — it retries on an escalating schedule (15 seconds, 30 seconds, 1 minute, 2 minutes, 5 minutes, then every 15 minutes) and enables the engines the moment a check succeeds. Once licensed, a server stays licensed for 24 hours from its last successful check, so a short outage on either side never stops your engines. The check runs over plain HTTP, so there is no certificate that could expire and lock your server out.

Whitelist in Discord

Go straight to the #ip-whitelisting channel

Whitelist on the website

Log in with Discord and manage it all in your browser