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Assetto Corsa server plugins, such as stracker or KissMyRank, are separate programs that talk to the Kunos server over UDP. The server sends live data to UDP_PLUGIN_ADDRESS and listens for plugin commands on UDP_PLUGIN_LOCAL_PORT, both in cfg/server_cfg.ini. On your FREAKHOSTING server both are empty (0), which means no plugin is in use. That is normal, and the server runs fine without one.

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What does “plugin UDP address is not set” mean?

It means UDP_PLUGIN_ADDRESS is empty, so the server has no plugin to send data to. It isn’t an error. Ignore it unless you want to use a plugin.

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What do server plugins do?

Each plugin is its own program with its own install guide. Follow the plugin author’s documentation for versions and settings.

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How plugins connect to the server

  1. The plugin program runs and listens on a UDP port.
  2. You set UDP_PLUGIN_ADDRESS to the plugin’s address and port, so the server sends it car positions, laps and chat.
  3. You set UDP_PLUGIN_LOCAL_PORT to a port the server listens on, so the plugin can send commands back (for example kicks or messages).

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Can I run a plugin on my FREAKHOSTING server?

Your server runs only the Kunos server program (./acServer). It doesn’t start other programs such as stracker or KissMyRank next to it. Your options:
  • Run the plugin on another machine, such as a VPS, and point UDP_PLUGIN_ADDRESS at it. For the plugin to send commands back, the server needs an extra port for UDP_PLUGIN_LOCAL_PORT. Open a ticket and ask for an extra port.
  • Use CSP extra options for rules such as a pit speed limiter, AFK auto-kick or chat filters. They need no plugin. See CSP features.
  • Use the built-in settings such as BLACKLIST_MODE, kick voting and LOCKED_ENTRY_LIST. See server_cfg.ini explained.

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How to set the plugin address

1

Stop the server

Stop your server.
2

Edit server_cfg.ini

In Files, open cfg/server_cfg.ini and set the plugin lines, for example:
Use the address and ports from your plugin’s setup, and the extra port we gave you for UDP_PLUGIN_LOCAL_PORT.
3

Start both

Start the plugin first, then the server, and check the plugin’s own log for incoming data.

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Frequently asked questions

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Do I need a plugin to run a public server?

No. Plugins are optional extras. The Kunos server handles sessions, voting and bans on its own.

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Is AssettoServer a plugin?

No. AssettoServer is a different server program that replaces the Kunos server and has its own plugin system. See AI traffic.

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Will the panel overwrite my plugin settings?

No. The panel only sets passwords and the game and HTTP ports. Your plugin lines stay as you set them.

Assetto Corsa server guide

Every Assetto Corsa page in one place.

server_cfg.ini explained

Every setting in the file.

CSP features

Server rules without a plugin.

AI traffic

AssettoServer and traffic.

Network and subdomains

Your server’s ports.
Tested by the FREAKHOSTING team on our Game Panel on 30 October 2026 (Assetto Corsa dedicated server, official Kunos acServer on Linux). Plugin keys checked against the Kunos notes reproduced in Assetto Server Manager. Steps may differ slightly if the game changes.

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Need Extra Help?

If you encounter any issues, our support team is ready to assist:

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Last Updated: October 2026