Red Dead Online Error Code 0x21002001 Troubleshooting on PC
Last Updated: September 18, 2025
Question: What can I do about the following error while playing Red Dead Online on PC?
You have been disconnected from Red Dead Online because the connection to Rockstar Games Services was lost [Error: 0x21002001]
Answer: This error is a result of a connectivity issue. If you are experiencing a poor connection while playing Red Dead Online on PC, the following steps may help resolve the problem:
Check your network connection and Rockstar Games Service availability
Check to make sure your internet connection is working properly
Check the Rockstar Games Service Status for server outages or scheduled maintenance:
If the Red Dead Online Status currently says Up, the problem may be related to some connection types conflicting with other players or other problems with your network setup.
Check your internet connection speed
Use an online speed test to measure your connection speed (e.g., https://www.speedtest.net/). Below are good targets for minimum upload and download speeds:
Download Speed: 7.5 Mbps
Upload Speed (recommended): 1 Mbps
Upload Speed (minimum): 0.5 Mbps
Note: If you are on a wireless connection and still having issues, try a wired connection.
Check your open network ports
Red Dead Online requires the following ports to be open:
Port 6672 (UDP)
Port 61455 (UDP)
Port 61457 (UDP)
Port 61456 (UDP)
Port 61458 (UDP)
Change your Domain Name Servers (DNS)
Go to Settings
Click Network and Internet
Under Advanced network settings, click on Change adapter options
Right-click on your Wi-Fi or Ethernet connection, depending on which you are currently using, then select Properties
Select Internet Protocol Version 4 (TCP/IPv4) and make sure the box is checked
Click Properties
Select Use the following DNS server
Enter the following DNS addresses in their respective text box:
Preferred DNS server: 8.8.8.8
Alternate DNS server: 8.8.4.4
Select Validate settings upon exit
Click OK
Select Internet Protocol Version 6 (TCP/IPv6) and make sure the box is checked
Click Properties
Enter the following DNS addresses in their respective text box:
Preferred DNS server: 2001:4860:4860::8888
Alternate DNS server: 2001:4860:4860::8844
Select Validate settings upon exit
Click OK
Reset your network router
You can reset your router by unplugging it and leaving it unplugged for about 10 minutes. Once you plug your router back in and can connect to the internet, launch Red Dead Online and check to see if your issue is resolved.