Load Data into Hbase outside Client Node - hadoop

Question

Thanks in advance.
We are loading data into Hbase using Java. It's pretty straight and works fine when we run the program on the client node (edge node). But we want to run this program remotely (outside the hadoop cluster) within our network to load the data.
Is there anything required to do this in terms of security on the hadoop cluster? When I run the program outside the cluster it's hanging..
Please advise. Greatly appreciate your help.
Thanks
Code here
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.client.Delete;
import org.apache.hadoop.hbase.client.HTable;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.util.Bytes;
import com.dev.stp.cvsLoadEventConfig;
import com.google.protobuf.ServiceException;
public class LoadData {
static String ZKHost;
static String ZKPort;
private static Configuration config = null;
private static String tableName;
public LoadData (){
//Set Application Config
LoadDataConfig conn = new LoadDataConfig();
ZKHost = conn.getZKHost();
ZKPort = conn.getZKPort();
config = HBaseConfiguration.create();
config.set("hbase.zookeeper.quorum", ZKHost);
config.set("hbase.zookeeper.property.clientPort", ZKPort);
config.set("zookeeper.znode.parent", "/hbase-unsecure");
tableName = "E_DATA";
}
//Insert Record
try {
HTable table = new HTable(config, tableName);
Put put = new Put(Bytes.toBytes(eventId));
put.add(Bytes.toBytes("E_DETAILS"), Bytes.toBytes("E_NAME"),Bytes.toBytes("test data 1"));
put.add(Bytes.toBytes("E_DETAILS"), Bytes.toBytes("E_TIMESTAMP"),Bytes.toBytes("test data 2"));
table.put(put);
table.close();
} catch (IOException e) {
e.printStackTrace();
}
}