Share via

RDCMan Connections Don't Open

Preston Aleshire 0 Reputation points
2026-02-17T15:31:14.04+00:00

Hello. I'm using RDCMan to connect to a handful of RDPs on our small network here. I'm adding them as the server name being the IP address and the port being the custom ports that we configure. I'm also setting all of the login information.

When trying to connect however I get a "catastrophic failure" message (little dramatic lol) and the connect doesn't go. It says it's possibly caused by location but I can't find a location field anywhere.

This is the latest version 3.12. Does anyone know what might be happening?

Sysinternals
Sysinternals

Advanced system utilities to manage, troubleshoot, and diagnose Windows and Linux systems and applications.

0 comments

1 answer

Sort by: Most helpful
Most helpful Newest Oldest
  1. Q&A Assist
    2026-02-17T15:31:25.74+00:00
    AI generated content. This question contains an answer created with AI from Q&A Assist. Learn more

    The "catastrophic failure" message you are encountering when trying to connect using RDCMan may be caused by several factors. Here are some troubleshooting steps you can take:

    1. Check the Server Name and Port: Ensure that you are entering the correct IP address and the custom port number for the RDP connection.
    2. Firewall Settings: Verify that the firewall on the remote server is configured to allow traffic on the specified port. You may need to check both the Windows Firewall and any other firewalls in your network.
    3. Network Configuration: Ensure that the network allows RDP traffic to the affected computer. This may involve checking with your network administrators.
    4. RDP Listener: Make sure that the RDP listener is configured correctly on the remote machine. You can check if the RDP port (default is 3389) is open and listening.
    5. Permissions: Confirm that your user account has the necessary permissions to connect to the remote server. You may need Query Information permissions on the remote server to list the sessions.
    6. RDCMan Configuration: If you are using a gateway, ensure that it is specified correctly as a Fully Qualified Domain Name (FQDN).

    If you continue to experience issues, consider checking the logs for any additional error messages that might provide more insight into the problem.

    References:

    0 comments

Your answer

Answers can be marked as 'Accepted' by the question author and 'Recommended' by moderators, which helps users know the answer solved the author's problem.