Connect to FTP site with Apache commons net FTP client through Proxy

Question

Hello,
I am trying to run this simple code to connect to FTP site through a proxy.
import org.apache.commons.net.ftp.FTP;
import org.apache.commons.net.ftp.FTPClient;
public class MyTest {
public static void main(String[] args) {
String ftpHostName = "ftp.xxx.com";
int ftpPort = 21;
String ftpUserName = "myUserName";
String ftpPassword = "myPassword";
System.setProperty("socksProxyHost" ,"10.148.0.131");
System.setProperty("socksProxyPort", "1080");
FTPClient ftpClient = new FTPClient();
try {
System.out.println("connecting");
ftpClient.connect(ftpHostName, ftpPort);
System.out.println("connected");
System.out.println("loging in");
boolean successLogin = ftpClient.login(ftpUserName, ftpPassword);
if(successLogin)
System.out.println("success login");
else
System.out.println("fail login");
catch (Exception e) {
e.printStackTrace();
finally {
try {
System.out.println("loging out");
ftpClient.logout();
System.out.println("disconecting");
ftpClient.disconnect();
catch (Exception e) {
e.printStackTrace();
I am getting the following error:
C:\temp\ftp\test>java.exe -cp ./commons-net-ftp-2.0.jar;. MyTest connecting
java.net.SocketException: Malformed reply from SOCKS server
at java.net.SocksSocketImpl.readSocksReply(SocksSocketImpl.java:87)
at java.net.SocksSocketImpl.connectV4(SocksSocketImpl.java:265)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:437)
at java.net.Socket.connect(Socket.java:519)
at org.apache.commons.net.SocketClient.connect(SocketClient.java:176)
at MyTest.main(MyTest.java:23)
loging out
java.lang.NullPointerException
at org.apache.commons.net.ftp.FTP.sendCommand(FTP.java:471<ftp://FTP.java:471>)
at org.apache.commons.net.ftp.FTP.sendCommand(FTP.java:534<ftp://FTP.java:534>)
at org.apache.commons.net.ftp.FTP.sendCommand(FTP.java:583<ftp://FTP.java:583>)
at org.apache.commons.net.ftp.FTP.quit(FTP.java:794<ftp://FTP.java:794>)
at org.apache.commons.net.ftp.FTPClient.logout(FTPClient.java:697)
at MyTest.main(MyTest.java:39)
I am able to do this using a different FTP client library, ftp4j-1.5.1<ftp://ftp4j-1.5.1> using the following code:
import it.sauronsoftware.ftp4j.FTPClient;
import it.sauronsoftware.ftp4j.connectors.SOCKS4Connector;
public class MyTestFtp4J {
public static void main(String[] args) {
String ftpHostName = "ftp.xxx.com";
int ftpPort = 21;
String ftpUserName = "myUserName";
String ftpPassword = "myPassword";
FTPClient ftpClient = new FTPClient();
ftpClient.setConnector(new SOCKS4Connector("10.148.0.131", 1080));
try {
System.out.println("connecting");
ftpClient.connect(ftpHostName, ftpPort);
System.out.println("connected");
System.out.println("loging in");
ftpClient.login(ftpUserName, ftpPassword);
System.out.println("success login");
catch (Exception e) {
e.printStackTrace();
finally {
try {
System.out.println("disconecting");
ftpClient.disconnect(true);
catch (Exception e) {
e.printStackTrace();
So I know the proxy settings are correct.
The java version I used to compile and run my apps is 1.6.0_06 Does anyone can help figure out what is wrong when I use the Apache commons net FTP client?
Thank you
Jon

Answer 1

Is the old AirPort Extreme base station (AEBS)
configured so that the option to distribute IP
addresses is DISABLED? If so, configure the new AEBS
to act as a bridge.
Are you suggesting I use a set-up with TWO AEBSs? Set up a bridge (not sure how) and then use the old AEBS to connect to the DSL modem and broadcast to the new Extreme which will then be the router to the other computers on the network?
Do you have any port mapping or default host enabled
on the old AEBS?
I do not understand, not do I see these options in the Base Station utitlity; perhaps they are in the FTP options--but that, I'm sorry to say, is not obvious to my inspection.
Duane, can you give me a few more basic instructions? Thanks
iMac 17