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CURL 56 ERROR

Last reviewed: June 2, 2026

The dreaded CURL 56 Error code... where to begin?

What is CURL 56?​

CURL error code 56 in FiveM typically indicates a failure in the network connection between your game client and the server.

  • CURL is a tool used by FiveM to handle network requests.
  • Error 56 message:
    • "Failure with receiving network data."

This can happen due to a number of issues on either the client-side or server-side, so buckle in!

Now, before coming to us, please gather all the information using our Basic Network Troubleshoot guide. CURL 56 is a beast of its own, and it's best you come prepared so we have all the information to find a quick resolution to get your players back in your city.

Below is just to provide some context and simple DIY solutions on yours/your players end:

Server-Side Issues​

Causes & Solutions:​

VPS/Dedicated Server is offline or not responding.
  • Check if the server is online
    • Try other players joining, or ping the IP using RDP
  • Restart the server or VPS.
Misconfigured DDoS Filters/Firewall Rules.
  • Verify server firewall (ensure port 30120 is open).
  • Open a ticket to verify your DDoS protection (filter configuration).
Some custom scripts or resources may stall the server or cause improper HTTP responses.
  • Disable custom scripts one-by-one and check.
  • Validate resource manifest files and endpoints.
Hosting provider issues.

Bonus Tips for Server-Side Issues​

  • Check if your FXServer has any recent console errors.
  • Verify your FXServer artifacts are up-to-date.
  • netstat -an | find "30120" on server to confirm listening port.
  • Use ping, tracert, or MTR tools to test packet loss or route failure.
  • curl -v https://yourserverurl in terminal to test handshake/debug.

Client-Side Network Issues​

Causes & Solutions:​

Internet Service Provider (ISP) is blocking or dropping packets
  • Restart your router.
  • Switch to a different network or use mobile hotspot to test.
  • Try connecting using direct IP (F8 console → connect <IP>:30120).
ISP is throttling or restricting specific ports.
  • Use a VPN to bypass ISP restrictions.
  • Run a pcap & connect to the FiveM server
Corrupted game cache or files.
  • Clear FiveM cache:
    • Go to %localappdata%\FiveM\FiveM.app\data\cache and delete everything except the game folder.
  • Verify GTAV/FiveM files.
Outdated game version, or mismatched version compared to server.
  • Reinstall or update FiveM.
  • Use same game version as the server.

Bonus Tips for Client-Side Issues​

  • Whitelist FiveM in Windows Firewall or antivirus.
  • Try connecting using direct IP (F8 console → connect <IP>:30120).