The Remote Desktop Protocol (RDP) error code 0x112f usually appears when there are issues with Remote Desktop Services (RDS), misconfigured group policies, or problems with the RDP licensing setup. To solve this error, start by restarting the Remote Desktop Services and checking the Event Viewer for detailed logs. Next, verify that your RDS license server is correctly installed and activated, and that users are assigned valid RDP CALs (Client Access Licenses). If group policies are blocking access, adjust them through the Local Group Policy Editor. In some cases, reapplying Windows updates or reinstalling RDP-related components may also be required to fully resolve the issue.
Understanding RDP Error Code 0x112f
RDP Error Code 0x112f is a general connectivity error that usually indicates that the RDP client cannot establish a connection to the remote computer. This error can be triggered by different factors, including:
- Network issues: Problems with your network connection can prevent the RDP client from reaching the remote server.
- Incorrect RDP configuration: Misconfigured settings on either the client or server side can lead to this error.
- Firewall or security software: Overly strict firewall rules or security software can block RDP traffic.
- Outdated RDP client or server software: Using outdated versions of RDP software can cause compatibility issues.
- Corrupted RDP client files: If the RDP client software is corrupted, it may fail to establish a connection.
Step-by-Step Guide How to Solve Remote Desktop Protocol Error Code 0x112f
1. Check Network Connectivity
The first step in resolving RDP Error Code 0x112f is to ensure that your network connection is stable and that there are no issues with connectivity.
- Ping the Remote Server: Use the ping command to check if the remote server is reachable.
- Open Command Prompt and type: ping [Remote Server IP or Hostname]
- If you receive a response, the server is reachable; if not, there may be a network issue.
- Check VPN Connections: If you are using a VPN, ensure that it is connected properly and that the VPN tunnel is functioning as expected.
- Test with Another Device: Try connecting to the remote server from another device on the same network to rule out local network issues.
2. Verify RDP Configuration on the Server
If the network is functioning correctly, the next step is to check the RDP configuration on the remote server.
- Ensure RDP is Enabled: Verify that Remote Desktop is enabled on the server.
- Go to System Properties > Remote and ensure that the option to allow remote connections is checked.
- Check RDP Listener: Ensure that the RDP listener is active and listening on the correct port (default is 3389).
- Open Command Prompt on the server and type: netstat -an | findstr 3389
- If the listener is active, you should see a line indicating that the server is listening on port 3389.
- Firewall Rules: Ensure that the Windows Firewall (or any third-party firewall) is not blocking RDP traffic.
- Open Windows Firewall with Advanced Security and check the Inbound Rules for Remote Desktop.
- Make sure that the rule allowing RDP traffic is enabled.
3. Update RDP Client and Server Software
Outdated software can cause compatibility issues that lead to RDP Error Code 0x112f.
- Update the RDP Client: Ensure that you are using the latest version of the RDP client software.
- For Windows, check for updates through Windows Update or manually download the latest RDP client from the Microsoft website.
- Update the Server: Make sure that the remote server has all the latest updates installed, including any updates related to RDP.
- Use Windows Update to check for and install any pending updates.
4. Check Security Software
Sometimes, security software can interfere with RDP connections.
- Temporarily Disable Security Software: Disable any antivirus, anti-malware, or firewall software temporarily to see if it is causing the issue.
- If disabling the software resolves the issue, you may need to adjust the settings to allow RDP traffic.
- Check for IP Blocking: Some security software may block IP addresses or ranges. Ensure that the IP address of the remote server is not being blocked.
5. Reset the RDP Client Settings
Corrupted or misconfigured RDP client settings can lead to Error Code 0x112f.
- Delete RDP Configuration Files: Reset the RDP client settings by deleting the configuration files.
- Navigate to %localappdata%\Microsoft\Terminal Server Client\Cache and delete the contents of the folder.
- Clear the RDP Cache: In the same directory, delete any cache files to ensure that old, corrupted data does not cause issues.
6. Recreate the RDP Connection
If the problem persists, try recreating the RDP connection from scratch.
- Remove the Existing Connection: Delete the existing RDP connection entry in your RDP client.
- Open the RDP client, right-click on the problematic connection, and select Delete.
- Create a New Connection: Manually create a new connection to the remote server, ensuring that all settings are correct.
- Double-check the IP address, port number, & authentication settings.
7. Check Group Policy Settings
In some cases, Group Policy settings may be causing RDP Error Code 0x112f.
- Open Group Policy Editor: On the remote server, open Group Policy Editor (gpedit.msc).
- Navigate to Personal Computer Configuration > Administrative Templates > Windows Components > Remote Desktop Protocol Services > Remote Desktop Protocol Session Host > Connections.
- Review Policy Settings: Ensure that no policies are set to restrict or limit RDP connections. Specifically, check the policies related to Allow users to connect remotely using Remote Desktop Services and Require use of specific security layer for remote (RDP) connections.
8. Check for Corrupted User Profiles
Corrupted user profiles on the server can cause RDP issues.
- Create a New User Profile: If possible, create a new user profile on the remote server and attempt to connect using the new profile.
- If the new profile works, the original user profile corrupted and require rebuilding.
9. Review Event Logs
Windows Event Logs can provide valuable information about what is causing RDP Error Code 0x112f.
- Open Event Viewer: On the remote server, open Event Viewer (eventvwr.msc).
- Navigate to Windows Logs > Application & System.
- Look for Errors: Look for any error messages or warnings related to Remote Desktop Protocol or network issues. These logs can provide clues about what is going wrong.
10. Consider Reinstalling RDP Components
If all else fails, you may need to reinstall the RDP components on the remote server.
- Reinstall RDP Role: On Windows Server, you can reinstall the RDP role using Server Manager.
- Open Server Manager, navigate to Manage > Remove Roles and Features, and remove the Remote Desktop Services role. Afterward, reinstall the role.
- Reinstall the RDP Client: On the client machine, consider uninstalling and reinstalling the RDP client software.
Conclusion
RDP Error Code 0x112f can be a challenging issue to resolve, as it can stem from a variety of causes, including network issues, misconfigurations, and software problems. By systematically following the steps outlined in this guide, you should be able to diagnose and fix the root cause of the error. Ensuring your RDP client and server are correctly configured, up-to-date, and free from interference by security software will go a long way toward preventing this and other RDP-related issues.
