Java program to connect telnet

Why do I get java. The "Connection refused" exception is thrown by jTDS when it is unable to connect to the server. There may be a number of reasons why this could happen: - The server name is misspelled or the port number is incorrect. Until telnet doesn't connect, jTDS won't either. If you can't figure out why, ask your network administrator for help.

Improve this question. Mike Mike 2, 13 13 gold badges 47 47 silver badges 70 70 bronze badges. What do you mean by "I can successfully ping the server but am not able to telnet into the server. Telnet has nothing to do with this. You are not connecting to the database via telnet. Your database server is not allowing a connection on the SQL Server port from your app; this is likely a network configuration or firewall configuration problem and not a software problem. Add a comment. Active Oldest Votes.

But again, nothing to do with java. A java. BufferedReader is created using System. This will be used to read data entered by the user to be sent to the telnet server. The user is prompted for a telnet server hostname. This hostname will be used when establishing a connection. Upon invoking the TelnetExample constructor a Telnet instance is created and the TelnetExample class is registered to handle any events fired by the Telnet instance.

Next, a connection to the telnet server is established by invoking the Telnet connect method and an OutputStream is retrieved by invoking the Telnet getOutputStream method.

Next, a while loop is created that constantly reads data entered by the user at the console. I thought it was an SSH library. The Apache Commons Net library includes a Telnet client. I was able to fix my problem. Here's the solution that worked for me. I will study about Apache Commons Net library. Thank you. You showed up just in time for the waffles! And this tiny ad:. The user responds with "myuserid". The password prompt is " Password: " and the user response is "mypassword".

Just as the user receives certain prompts from the telnet session and responds to them, the connection client specifically, TelnetConnectClient or TunneledConnectClient behaves the same way. It waits for certain prompts from the telnet or spawner session or from the tunnel feature's server programs and then responds. You can create all the prompt and response properties required to pass the information that your connection daemon requires, using the following format:.

Note: All but one of the connection properties is created using this format. One property, sasPortTag, is hardcoded to specify the port tag.