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Connection timed out: Could be due to invalid connection

 
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I have Apache FTPServer implemented on a production aix machine. The user can log in but when they attempt to send a file I get the following error:
[ WARN] 2007-11-28 10:14:59,850 FtpDataConnection.getDataSocket()
java.net.SocketException: Connection timed out:could be due to invalid address
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:336)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:201)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:188)
at java.net.Socket.connect(Socket.java:478)
at java.net.Socket.connect(Socket.java:428)
at java.net.Socket.<init>(Socket.java:335)
at java.net.Socket.<init>(Socket.java:179)
at org.apache.ftpserver.FtpDataConnection.getDataSocket(FtpDataConnectio
n.java:202)
at org.apache.ftpserver.FtpRequestImpl.getDataInputStream(FtpRequestImpl
.java:318)
at org.apache.ftpserver.command.STOR.execute(STOR.java:110)
at org.apache.ftpserver.RequestHandler.service(RequestHandler.java:282)
at org.apache.ftpserver.RequestHandler.run(RequestHandler.java:244)
at java.lang.Thread.run(Thread.java:568)



I have highlighted where this occurs in the following method. This is when the service attempts to establish a socket for the user to use to send the file:
public synchronized Socket getDataSocket() {

// get socket depending on the selection
dataSoc = null;
IDataConnectionConfig dataConfig = fconfig.getDataConnectionConf();
try {
if(isPort) {
int localPort = dataConfig.getActiveLocalPort();
if(secure) {
ISsl ssl = dataConfig.getSSL();
if(ssl == null) {
throw new FtpException("Data connection SSL not configured");
}
if(localPort == 0) {
dataSoc = ssl.createSocket(null, address, port, false);
}
else {
InetAddress localAddr = dataConfig.getActiveLocalAddress();
dataSoc = ssl.createSocket(null, address, port, localAddr, localPort, false);
}
}
else {
if(localPort == 0) {
>>> dataSoc = new Socket(address, port);
}
else {
InetAddress localAddr = dataConfig.getActiveLocalAddress();
dataSoc = new Socket(address, port, localAddr, localPort);
}
}
}
else if(isPasv) {
dataSoc = servSoc.accept();
}
}
catch(Exception ex) {
closeDataSocket();
log.warn("FtpDataConnection.getDataSocket()", ex);
}

return dataSoc;
}

When I run the service on my development server it works fine. Can anyone tell me whether or not this is happening due to filewall restrictions or some other configuration issue on the production server? If it is firewall related how can articulate to my infrastructure staff what I suspect the problem is?

Thanks
 
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