Press the , type cmd , and open the Command Prompt as Administrator . Type ipconfig /flushdns and hit Enter . Type netsh winsock reset and hit Enter . Restart your computer. Change to Google Public DNS

"NO!" Elias shouted, slamming his fist on the desk. The error wasn't a timeout this time; it was a rejection.

Does this error happen on or just one specific server ?

Windows Defender or third-party antivirus software can mistake Assetto Corsa's multiplayer traffic for a security threat. Allow the Game Through Windows Firewall

Set to 8.8.4.4 (Google DNS) or 1.1.1.1 (Cloudflare DNS). Click OK and restart your PC. 2. Verify Your Game Files and Mod Content

Apply the settings and reboot your router. Then, restart your PC.

Corrupt local files can cause the netcode to misbehave, signaling to the server that your instance of Assetto Corsa is invalid. A quick integrity check via Steam can patch missing background files. Open your . Right-click on Assetto Corsa and select Properties . Navigate to the Installed Files (or Local Files) tab. Click Verify integrity of game files .

Call your ISP and ask for a public IP address (disable CGNAT).

: Click Change settings at the top. Scroll down the list until you find Assetto Corsa (and Content Manager , if applicable).

Are you trying to join a or hosting a private server yourself ? Do you use Content Manager or the standard game launcher ?