java.net.ConnectException: Connection refused

[Albert]

Recently I had been struggling with some code to get a https connection to work.

It was coming up with an error that no trusted certificates could be found. I'm working on the program on Windows and putting into a unix server to be run. This worked fine initially with no problems, then the server changed from http to https, so I had to implement some changes to deal with this, now however, even though it works fine on windows when put on unix,
it throws up this error:

java.net.ConnectException: Connection refused

Code:

         java.security.Security.insertProviderAt(new sun.security.provider.Sun(),2);
         java.security.Security.addProvider(new sun.security.provider.Sun());
         java.security.Security.insertProviderAt(new com.sun.net.ssl.internal.ssl.Provider(),1);
 
         // set protocol to java.protocol.handler.pkgs property to 'HTTP'
         // -- to do with if report server site is HTTPS
         System.setProperty("java.protocol.handler.pkgs","HTTP");
         
         
         // Trustmanager -- set to trust any certificate for a secure server
  		TrustManager[] trustAllCerts = new TrustManager[] { new X509TrustManager() {
  			public java.security.cert.X509Certificate[] getAcceptedIssuers() {
  				return null;
  			}
  
  			public void checkClientTrusted(
  				java.security.cert.X509Certificate[] certs, String authType) {
  			}
  
  			public void checkServerTrusted(
  				java.security.cert.X509Certificate[] certs, String authType) {
  			}
  		} };
 
 
 
  		try {
  			SSLContext sc = SSLContext.getInstance("SSL");
  			sc.init(null, trustAllCerts, new java.security.SecureRandom());
  			HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
  		} catch (Exception e) {
  			e.printStackTrace();
  		}
 
         
  		URL url = null;
  		try {
  			url = new URL( rptUrl );	//rptUrl contains url to use
  		} catch (MalformedURLException mue) {
  			mue.printStackTrace();
  		}
 
 		//HttpsURLConnection c;
 		
 		try {
 			
 
 			URLConnection c = url.openConnection();
 
 			//set cache and request method settings
 			c.setUseCaches(false);
 
 			//set other headers
 			c.setRequestProperty ("Content-Type", "application/pdf");
 		    
 			//connect to the server..
 			c.connect();
 
 			////some code about what to do with file etc etc....

Any ideas? Thanks.

Albert

[Felissa]

It sounds like there is a DNS problem. A connection refused means that the client machine cannot connect to the port on the server machine.

If I assume that the server machine is the same on both Windows and Unix then the only thing left is that the Unix machine is pointing to a different IP address than the Windows machine.

Greetings.

Felissa

[Albert]

The server is usually a certian name example server1. And the https site to connect to is server1.com: The Leading Server Site on the Net

However, now they've done something to the site so the link is now https://site2.com/page.jsp however you still log into onto unix using the original server1... so they may be something in play there?

To clarify local machine is windows, just opens a connection to server. The unix part of it is the java program should be located on the server, which opens a http connection to a site which is on the same server.
Greetings.
Albert