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Frequently asked questions for DeltaCopy

NOTE: We now offer two solution for using rsync on Windows: We recommend checking both of them to see which works best for you. Click here to see differences.

Question: I am running into connection problems with DeltaCopy. What can I do?
Answer: DeltaCopy has two modules: Client and Server. Often the client is not able to talk to the server and you get an error similar to the following:

Unable to establish connection.rsync: failed to connect to server: Connection refused (111)

This error usually errors when the client cannot talk to the server over the network.
  • Ensure any firewall is either disabled or properly configured to allow port 873 traffic from client to server.
  • Ensure the server is listening on the target machine

Try the following troubleshooting techniques

  • Check if DeltaCopy service is running on the server. If it is not, start the service from Windows Control Panel
  • Ensure that you can ping the server. Note that a successful ping does not guarantee a successful TCP/IP connection on a specific port. Therefore, additional test is required. A ping ensure two machines can see each other.
  • Open a console (DOS) window on the server machine and type the following

    telnet localhost 873

    The server is listening if you see a blank screen. If you get a connection error, it means that the rsync daemon is not listening. Find out why it is not running.
  • Repeat the same procedure from your client machine. However, the command will now look like following.

    telnet YourServerIP 873

  • If you do not see a blank screen, that indicates a network problem. Your client machine cannot open a TCP/IP connection to the server. Most likely this is a firewall issue. There could be two firewalls in picture:
    1. Provided by the operating system on the server machine. Most modern OS have a built-in firewall. You will either have to open port 873 or allow rsync.exe to listen.
    2. Provided by a device, most likely a router sitting at the edge of your network

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