Client Server using Internet [ask]
I have a client server project who connect between LAN connection and now I want to upgrade it into internet connection. I have search several programs who has similar architecture but none is suitable. Could anybody help me out how to build basic client server which connect using internet connection?
I have attach my previous program below, I really appreciated if anyone may modify it so be able connect trough internet.
Solved!
Go to Solution.
Attachments:
Client.vi 262 KB
Server.vi 164 KB
Hi,
with your program, you seem to have the full control over your house ;-). Why it shouldn't work over internet as it is? You have TCP open, TCP close...in Internet, you simply have to use other IP-adresses as the local ones. So can you specify your question? Or is it a problem with your LAN-infrastructure, that you have to configure your router to have access from outside?
I don't see why it shouldn't work over Inet...
christian
THINK G!! ;-)
Using LabView 2010 and 2011 on Mac and Win
Programming in Microsoft Visual C++ (Win), XCode (Mac)
Similar Messages
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Hi everybody.
I have always realized applications Client - Server. The users were using an application of windows developed in Java, which was attacking a database server, being all the users inside a local network (in the same building).
Now I have to make an application where the users (on approximately 50 in whole) are distributed by the face of the world, for what the application will have to communicate to itself across Internet.
This presents to me three doubts (possibly some of the things that I say do not have greatly sense, due to my void experience in this ambience, ask a little of comprehension before judging the post):
What type of user's interface do I use?
It might use a traditional windows application, use a web navigator, applets, html, web 2.0, javafx?.
What type of server do I use?
I do not believe that it is suitable to attack straight to the database, therefore I will have to use a server who takes charge of the business rules. What can I use? Is it possible to use hostings of third for the server (with the business rules)? Do you know anyone?
What type of comunication do I use?:
html?: web services?: others? I suppose that they will have frameworks, applications, etc. to help to develop this type of computer systems. Do you know anyone?
Since you can see, here there is many cloth. He would be grateful that you were giving me a light idea of that it could use, it would be marvelous if you can give me references (docs, you paginate webs, forums, blogs, etc) to be able to begin and study in depth the topic.
Thank you very much for your help.TechGSis wrote:
What type of user's interface do I use?
It might use a traditional windows application, use a web navigator, applets, html, web 2.0, javafx?.
yes.
What type of server do I use?
I do not believe that it is suitable to attack straight to the database, therefore I will have to use a server who takes charge of the business rules. What can I use? Is it possible to use hostings of third for the server (with the business rules)? Do you know anyone?
That would depend on what you want the server to do of course.
What type of comunication do I use?:
html?: web services?: others? I suppose that they will have frameworks, applications, etc. to help to develop this type of computer systems. Do you know anyone?
for example.
But the only thing we can tell you is to use TCP. Whatever you send over that would depend on your decisions re clients and servers. -
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Try the troubleshooting links below to help:
http://zone.ni.com/devzone/conceptd.nsf/webmain/D5F8511921D0352586256A330059DEF9?opendocument&node=DZ52188_US
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I have a client server application using RMI that works on Win NT4.0 when I am connected
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This same application does not work as a standalone (not connected to network) when running
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I do not these problem with WinNT4.0
Any ideas?
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Issue with Ftp Client / Server using Sockets
I have developed a Ftp Client and a Ftp Server. The client Connects to the Ftp Server and sends files to the ftp server. It is a multi threaded server and can have multiple clients connecting to it.
If a client goes down...the server waits till the client comes up
Similarly the client waits if a server goes down and reconnects when the server is again up and running
i am having a strange issue here. When two clients go down and reconnect to the server...They take a long time to connect and transferring of files takes a long time...
Other wise in all other scenarios the duo work properly.
Any feedback and suggestion about this strange issue from all you java gurus out there will be deeply appreciated.
Here is the client code
import java.net.*;
import java.net.Socket;
import java.net.InetAddress;
import java.io.*;
import java.io.File;
import java.util.*;
import java.lang.*;
import java.lang.Object;
import javax.crypto.*;
import java.util.regex.*;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.PBEParameterSpec;
import java.security.spec.AlgorithmParameterSpec;
import java.security.spec.KeySpec;
import java.io.InputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.File.*;
import java.nio.channels.FileLock;
public class FTPClient {
public static void main(String[] args) throws Exception
Timer timer = new Timer("Test Timer");
timer.scheduleAtFixedRate(new TimerTask()
private int counter = 0;
public void run() {
try {
System.out.println(counter++);
Socket soc=new Socket("xxx.x.x.xx",5217);
System.out.println("Socket Initialised.");
transferfileClient t=new transferfileClient(soc);
t.SendFile();
System.out.println("run complete.");
catch(Exception ex)
}, 10000, 40000);
static class transferfileClient
Socket ClientSoc;
DataInputStream din;
DataOutputStream dout;
BufferedReader br;
transferfileClient(Socket soc)
try
ClientSoc=soc;
din=new DataInputStream(ClientSoc.getInputStream());
dout=new DataOutputStream(ClientSoc.getOutputStream());
br=new BufferedReader(new InputStreamReader(System.in));
catch(Exception ex)
//encrypto routine starts
class DesEncrypter {
Cipher ecipher;
Cipher dcipher;
// 8-byte Salt
byte[] salt = {
(byte)0xA9, (byte)0x9B, (byte)0xC8, (byte)0x32,
(byte)0x56, (byte)0x35, (byte)0xE3, (byte)0x03
// Iteration count
int iterationCount = 19;
DesEncrypter(String passPhrase) {
try {
// Create the key
KeySpec keySpec = new PBEKeySpec(passPhrase.toCharArray(), salt, iterationCount);
SecretKey key = SecretKeyFactory.getInstance(
"PBEWithMD5AndDES").generateSecret(keySpec);
ecipher = Cipher.getInstance(key.getAlgorithm());
dcipher = Cipher.getInstance(key.getAlgorithm());
// Prepare the parameter to the ciphers
AlgorithmParameterSpec paramSpec = new PBEParameterSpec(salt, iterationCount);
// Create the ciphers
ecipher.init(Cipher.ENCRYPT_MODE, key, paramSpec);
dcipher.init(Cipher.DECRYPT_MODE, key, paramSpec);
} catch (java.security.InvalidAlgorithmParameterException e) {
} catch (java.security.spec.InvalidKeySpecException e) {
} catch (javax.crypto.NoSuchPaddingException e) {
} catch (java.security.NoSuchAlgorithmException e) {
} catch (java.security.InvalidKeyException e) {
// Buffer used to transport the bytes from one stream to another
byte[] buf = new byte[1024];
public void encrypt(InputStream in, OutputStream out) {
try {
// Bytes written to out will be encrypted
out = new CipherOutputStream(out, ecipher);
// Read in the cleartext bytes and write to out to encrypt
int numRead = 0;
while ((numRead = in.read(buf)) >= 0) {
out.write(buf, 0, numRead);
out.close();
} catch (java.io.IOException e) {
public void decrypt(InputStream in, OutputStream out) {
try {
// Bytes read from in will be decrypted
in = new CipherInputStream(in, dcipher);
// Read in the decrypted bytes and write the cleartext to out
int numRead = 0;
while ((numRead = in.read(buf)) >= 0) {
out.write(buf, 0, numRead);
out.close();
} catch (java.io.IOException e) {
} //encryptor routine ends
void SendFile() throws Exception
try
String directoryName;
// File object referring to the directory.
String[] files; // Array of file names in the directory.
//directory = new File ( "C:\\FTP\\" ) ;
File directory1 = new File("C:\\FTP");
boolean successmk = directory1.mkdir();
if (!successmk) {
// Directory creation failed /Already Exists
File directory = new File("C:\\FTP\\ftpc");
boolean successmk1 = directory.mkdir();
if (!successmk1) {
// Directory creation failed /Already Exists
//directory = new File ( "E:\\FTP-encrypted" ) ;
if (directory.isDirectory() == false) {
if (directory.exists() == false)
System.out.println("There is no such directory!");
else
System.out.println("That file is not a directory.");
else {
files = directory.list();
System.out.println("Files in directory \"" + directory + "\":");
for (int i = 0; i < files.length; i++)
String patternStr = "xml";
Pattern pattern = Pattern.compile(patternStr);
Matcher matcher = pattern.matcher(files);
boolean matchFound = matcher.find();
if (matchFound) {
System.out.println(" " + files[i]);
String filename;
filename=files[i];
File f=new File(directory,filename);
FileLock lock = null;
FileOutputStream fos = new FileOutputStream(f, true);
lock = fos.getChannel().tryLock();
if (lock == null) {
System.out.println(" Failed to get the file lock: means that the file is locked by other instance.");
fos.close();
else
InetAddress addr = InetAddress.getLocalHost();
// Get IP Address
//byte[] ipAddr = addr.getAddress();
String ip= addr.toString();
// Get hostname
//String hostname = addr.getHostName();
System.out.println(" Lock Acquired.");
lock.release();
fos.close();
dout.writeUTF("SEND");
dout.writeUTF(ip);
dout.writeUTF(filename);
//String msgFromServer=din.readUTF();
DesEncrypter encrypter = new DesEncrypter("My Pass Phrase!");
// Encrypt
FileInputStream fino=new FileInputStream(f);
encrypter.encrypt(fino,
new FileOutputStream("ciphertext.txt"));
fino.close();
FileInputStream fin=new FileInputStream("ciphertext.txt");
int ch;
do
ch=fin.read();
dout.writeUTF(String.valueOf(ch));
while(ch!=-1);
fin.close();
String option;
option=din.readUTF();
if((option.compareTo("Delete")==0))
boolean success = (new File("ciphertext.txt")).delete();
boolean success1 = f.delete();
if (success) {
System.out.println("File Sent ...");
if (success1) {
System.out.println("--File deleted from Client ...");
for (int j = 0; j < 999999999; j++){}
}//pattermatch loop ends here
else
{ //System.out.println(" " + "Not an XML file-------->" +files[i]);
for (int jb = 0; jb < 111999999; jb++){}
}// for loop ends here for files in directory
}//else loop ends for directory files listing
System.out.println("sendfile finished...");
return;
} catch(Exception ex) {ex.printStackTrace();}
}//sendfile ends here
public void displayMenu() throws Exception
System.out.println(" Send File");
SendFile();
return;
And here is the server code...
import java.net.*;
import java.io.*;
import java.util.*;
import java.util.Date;
import java.text.SimpleDateFormat;
import java.text.DateFormat;
import java.text.Format;
import java.lang.Object;
import java.lang.*;
import javax.crypto.*;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.PBEParameterSpec;
import java.security.spec.AlgorithmParameterSpec;
import java.security.spec.KeySpec;
public class FTPServer
{ public static void main(String args[]) throws Exception
{ ServerSocket soc=new ServerSocket(5217);
System.out.println("FTP Server Started on Port Number 5217");
while(true)
System.out.println("Waiting for Connection ...");
transferfile t=new transferfile(soc.accept());
class transferfile extends Thread
Socket ClientSoc;
DataInputStream din;
DataOutputStream dout;
transferfile(Socket soc)
{ try
{ ClientSoc=soc;
din=new DataInputStream(ClientSoc.getInputStream());
dout=new DataOutputStream(ClientSoc.getOutputStream());
System.out.println("FTP Client Connected ...");
System.out.println("External IP of Client ..." + ClientSoc.getInetAddress());
//System.out.println("FTP Client Connected ..." + ClientSoc.getRemoteSocketAddress());
start();
catch(Exception ex)
//encrypto routine starts
class DesEncrypter {
Cipher ecipher;
Cipher dcipher;
// 8-byte Salt
byte[] salt = {
(byte)0xA9, (byte)0x9B, (byte)0xC8, (byte)0x32,
(byte)0x56, (byte)0x35, (byte)0xE3, (byte)0x03 };
// Iteration count
int iterationCount = 19;
DesEncrypter(String passPhrase) {
try {
// Create the key
KeySpec keySpec = new PBEKeySpec(passPhrase.toCharArray(), salt, iterationCount);
SecretKey key = SecretKeyFactory.getInstance(
"PBEWithMD5AndDES").generateSecret(keySpec);
ecipher = Cipher.getInstance(key.getAlgorithm());
dcipher = Cipher.getInstance(key.getAlgorithm());
// Prepare the parameter to the ciphers
AlgorithmParameterSpec paramSpec = new PBEParameterSpec(salt, iterationCount);
// Create the ciphers
ecipher.init(Cipher.ENCRYPT_MODE, key, paramSpec);
dcipher.init(Cipher.DECRYPT_MODE, key, paramSpec);
} catch (java.security.InvalidAlgorithmParameterException e) {
} catch (java.security.spec.InvalidKeySpecException e) {
} catch (javax.crypto.NoSuchPaddingException e) {
} catch (java.security.NoSuchAlgorithmException e) {
} catch (java.security.InvalidKeyException e) {
// Buffer used to transport the bytes from one stream to another
byte[] buf = new byte[1024];
public void encrypt(InputStream in, OutputStream out) {
try {
// Bytes written to out will be encrypted
out = new CipherOutputStream(out, ecipher);
// Read in the cleartext bytes and write to out to encrypt
int numRead = 0;
while ((numRead = in.read(buf)) >= 0) {
out.write(buf, 0, numRead);
out.close();
} catch (java.io.IOException e) {
public void decrypt(InputStream in, OutputStream out) {
try {
// Bytes read from in will be decrypted
in = new CipherInputStream(in, dcipher);
// Read in the decrypted bytes and write the cleartext to out
int numRead = 0;
while ((numRead = in.read(buf)) >= 0) {
out.write(buf, 0, numRead);
//added later on
in.close();
out.close();
} catch (java.io.IOException e) {
} //encryptor routine ends
//not implemented right now as we arent using the ftp server to download stuff...can be activated later on if we want
void SendFile() throws Exception
String filename=din.readUTF();
File f=new File(filename);
if(!f.exists())
dout.writeUTF("File Not Found");
return;
else
{ dout.writeUTF("READY");
FileInputStream fin=new FileInputStream(f);
int ch;
do
ch=fin.read();
dout.writeUTF(String.valueOf(ch));
while(ch!=-1);
fin.close();
dout.writeUTF("File Received Successfully");
String Compare(String filename) throws Exception
///dout.writeUTF("entering compare");
String dateTempString=new String();
Date dateValue=new Date();
SimpleDateFormat formatter = new SimpleDateFormat ("hhmmss");
dateTempString = formatter.format(dateValue);
File dir1 = new File("C:\\FTPnew");
boolean success2 = dir1.mkdir();
if (!success2) {
// Directory creation failed /Already Exists
File dir = new File("C:\\FTPnew\\server");
boolean success = dir.mkdir();
if (!success) {
// Directory creation failed /Already Exists
File ftemp=new File(dir,dateTempString + filename);
File fnewtemp=new File(dir,"new-enc-"+filename);
// Create encrypter/decrypter class
DesEncrypter encrypter = new DesEncrypter("My Pass Phrase!");
FileOutputStream fout=new FileOutputStream(fnewtemp);
int ch;
String temp;
do
{ temp=din.readUTF();
ch=Integer.parseInt(temp);
if(ch!=-1)
fout.write(ch);
}while(ch!=-1);
fout.close();
//dout.writeUTF("written temp en file");
// Decrypt
encrypter.decrypt(new FileInputStream(fnewtemp),
new FileOutputStream(ftemp));
//String Option;
dout.writeUTF("Delete");
System.out.println("File Upload Successfull--Duplicate file with timestamp Created");
boolean success1 = fnewtemp.delete();
return "hello" ;
void ReceiveFile() throws Exception
String ip=din.readUTF();
System.out.println("\tRequest Coming from Internal IP Address : "+ ip);
String filename=din.readUTF();
if(filename.compareTo("File not found")==0)
return;
// Destination directory
File dir11 = new File("C:\\FTPnew");
boolean success22 = dir11.mkdir();
if (!success22) {
// Directory creation failed /Already Exists
File dir = new File("C:\\FTPnew\\server");
boolean success21 = dir.mkdir();
if (!success21) {
// Directory creation failed /Already Exists
File f=new File(dir ,"enc-"+filename);
File fe=new File(dir,filename);
String option;
if(fe.exists())
//dout.writeUTF("File Already Exists");
String compvalue = Compare(filename);
//dout.writeUTF(compvalue);
if(compvalue.compareTo("hello")==0)
//dout.writeUTF("Transfer Completed");
return;
option=din.readUTF();
else
//dout.writeUTF("SendFile");
option="Y";
if(option.compareTo("Y")==0)
// Generate a temporary key.
// Create encrypter/decrypter class
DesEncrypter encrypter = new DesEncrypter("My Pass Phrase!");
FileOutputStream fout=new FileOutputStream(f);
int ch;
String temp;
do
{ temp=din.readUTF();
ch=Integer.parseInt(temp);
if(ch!=-1)
fout.write(ch);
}while(ch!=-1);
fout.close();
// Decrypt
encrypter.decrypt(new FileInputStream(f),
new FileOutputStream(fe));
boolean success2 = f.delete();
dout.writeUTF("Delete");
System.out.println("File Upload Successfull");
else
return;
public void run()
while(true)
try
String Command=din.readUTF();
if(Command.compareTo("SEND")==0)
System.out.println("\tSEND Command Received ...");
ReceiveFile();
continue;
catch(Exception ex)
//System.out.println("\tClient Terminated Abnormally ...........");
continue;Please note that this is not an FTP client and server. FTP is defined by a standard IETF protocol and this isn't it.
Then, move the following lines:
din=new DataInputStream(ClientSoc.getInputStream());
dout=new DataOutputStream(ClientSoc.getOutputStream());
System.out.println("FTP Client Connected ...");
System.out.println("External IP of Client ..." + ClientSoc.getInetAddress());
//System.out.println("FTP Client Connected ..."+ClientSoc.getRemoteSocketAddress());from the constructor into the run() method. i.e. don't do anything with the socket in the thread which handles the accept(). -
Hi.
I just created a small network: 2 pcs and 1 mac.
2 pcs are using windows XP
1 Mac is using OS X
I would like to know how to access files from my pc1 to pc2 from my network.
Pc2 obviouslys is a client behind the intenet sharing my mac is providing.
I tried looking for the info online but most of the search brigns out "internet sharing" or "file sharing."
Any help would be great.The following may help with the file sharing issues: OS X Mavericks: Share your files
-
Why timesten is slow in client/server mode
i am testing Timesten client/server mode and find that
it is to slow.
when using dircet mode, timesten can precoss about 40000 query pre second
but when change to client/ server mode
it can only process 1500 query pre second.
here is my config and test sql.
[Test_tt702]
Driver=//u01/oracle/TimesTen/tt70/lib/libtten.a
DataStore=//u01/oracle/TimesTen/tt70/info/DemoDataStore/Test_tt702
DatabaseCharacterSet=US7ASCII
TempSize=64
PermSize=250
Temporary=1
TypeMode=1
CREATE TABLE TEST999
A1 number NOT NULL PRIMARY KEY ,
A2 number,
A3 number
network card is 1000m,
query code:
PreparedStatement pSel = dbConn.prepareStatement("select a1,a2 from TEST999 where a1=?");
rs = null;
int a1=0;
int a2=0;
for(int i=0;i<80000 ;i++)
pSel.setInt(1,i );
rs=pSel.executeQuery( );
if (rs.next()) {
a1 = rs.getInt(1);
a2 = rs.getInt(2);
if( i%8000==0) {
System.out.println("select "+ i +" res="+a1 +" time " + getTime_v2());
rs.close();
direct mode time : 80000 query is 2 second
client/server mode in the same machine : 80000 query is 12 second
client/server mode in the different machine : 80000 query is 54 second
any one have idea about this?
is it the jdbc driver 's promble?it is to be expected that there will be a big difference in performance between direct mode and client/server due to much greater overhead in client/server, especially if the client is on a different machine. However, the differences you are seeing here are larger than I would normally expect.
You say (I think) that the network is 1 GB, correct? What is the hardware spec of the test machine(s)? Have you tuned the O/S network stack for optimal performance?
Typically, for local client/server using the fastest IPC mode (shmipc) I expect performance of around 20-30% of direct mode and for remote client/server with a GB LAN I would expect performance of around 10-20% of direct mode.
Chris -
hi
can any1 over here help me out in how to establish connection between 2 RF modem's for data transfer , between client & server USing LABVIEW?
I want to establish a connection between 2 PC's through RF modem on client & server side & to set up PPP communication for data transfer.
(I have tried data transfer through RS-232 using TCP/IP whn the 2 PC's are connected over ethernet... which is working.
I also tried connecting loopback cable between 2 PC's COM port & geting data transfer using VIsa configure serial port & other visa functions ... which is working)
can u guide me how to establish connection between 2 RF modem's using LABview?
& how does the data transfer take place between 2 RF modems through RS-232?
is it using TCP/IP?
If you got any links to go abt this issue do send me related links .. or any examples .....
I am currently using Labview version 8.
Waiting in anticipation.. reply ASAP..
thanking you
Regards
Yogan..Howdy yogan,
Maybe you could clarify a few things for me, and we'll see how we can help ya. TCP/IP protocol occurs through an ethernet connection; RS-232 communication occurs through an RS-232 serial connection, typically through a cable that has a DB9 connector on both ends. Do you mean that the RF modems in question have the option to communicate via RS-232 and/or via TCP/IP ethernet? Specific information like the manufacturer of your RF modems, the model number of your RF modems, and how you connect the modems to the PC would enable us to give you more efficient support.
You can check our Instrument Driver Network (IDNet) to see if a plug-and-play/IVI driver already exists for your RF modem. (You'll need to know its manufacturer and model number.) In the case that you do find an IDNet driver for your modem, you can use this KnowledgeBase article for instructions on how to use the driver.
Another excellent resource to consider is the NI Example Finder. You can access this within LabVIEW by navigating to Help»Find Examples and then searching for serial or TCP/IP examples.
Message Edited by pBerg on 03-10-2008 04:35 PM
Warm regards,
pBerg -
Oracle Forms6i in a client\server environment is a great product that still works very well for us. We do not need (or want) a web-based solution. Our system only needs to support our in-house users (about 400 currently).
I am very disappointed in the direction that Oracle is forcing us to go (web-based) if we want to stay with the Oracle tools that we know well. This isn't so much a request for help, it's more an attempt to communicate to the Oracle Forms manager(s) that going away from client\server is very disappointing to us and looks to be a bad business decision.Mark,
I must appologize, but I though that things are easier to search and find on this forum. I tried for half an hour but wasn't able to spot the main thread ;-(
The summary of it is that there was a big discussion on this forum after Oracle announced its desupport date for Forms and Reports client/server (sometime in July if I remember well). Along with this desupport date there was a discussion whether or not Oracle Forms supports XP. The initial decision of not supporting XP was reverted and XP now is supported since patch 13.
For client/server the desupport date is January 1st 2005 for error correction and January 1st 2008 for extended assistance support. Thus Forms6i client/server will be around until end of 2007.
Most discussions on this forum were about the cost going with moving Forms to the Web, especially keeping in mind that client/server runtime was for free.
Another issue was the size of the Oracle9iAS installation which is 6GB all in all though Forms users may not use all the Oracle Application Server components.
Last but not least, many customers didn't feel ready to move their applications to the Web in this period of time, especially those that run character mode applications.
The installation issue gets fixed with the upcoming Oracle Application Server 10g which has a installation option that only installs the software required to run Forms and Reports.
The migration is assisted by a Forms Migration Assistant in Forms9i as well as material that we compiled and published on OTN. The WebUtil library finally was developed to close the gap between client/server functionality and teh Web functionality.
I can't talk about pricing, because this is not in the scope of my professional work, but OTN offered a special upgrade promotion for Forms users when moving their applications to teh Web.
Client/server as it is in Forms6i will not come back, this is how it seems.
There have been discussions on this forum if one could simulate client/server using the Forms Web components installed on a local client. Webstart was mentioned as one possible solution as it would allow you to have Forms applications started and run from an icon on the user desktop. Currently there are some investigations in Forms development going into this direction.
The majority of customers that posted their opinion on the client/server desupport did not like the client/server desupport plan at all.
The OTN forum postings where brought to Oracle senior management attention by Forms Product Managers monitoring this list.
The benefit of a Web only version of Forms - and you may disagree - is integration with the J2EE stack Oracle has within Oracle9iAS and OracleAS 10g.
J2EE is a technology that more and more customers evaluate for future development efforts. Having Forms integrating with J2EE applications(as seamlessly as possible)is the best way to make sure that Forms users can leverage their investment in the Forms technology. Even more, you can extend Forms applications with J2EE or have it communicating with it (the same applies to Reports)
Many new features that we implemented in Forms6i and Forms9i worked on the Web only (SSO, Enterprise Manager monitoring, client side Java etc).
Mark, hope that this summary gives you a good idea of what the discussions were about and that we do care of what customers do with Forms.
Just in case that I missed an argument or presented it too positive (my memory is subjective and not perfect), I am sure that the forum members which already contributed to this posting will add additional comments. Others may join in too.
Frank -
HELP:USING CLIENT SERVER PROGRAM ON DIFF.MACHINES CONNECTED TO INTERNET?
BELOW IS THE JAVA CODE FOR CLIENT & SERVER PROGRAM (TCP) USING SOCKET.
I AM TRYING TO RUN CLIENT & SERVER PROGRAM ON 2 DIFFERENT MACHINES CONNECTED 2 INTERNET
(1 RUNS SERVER.java & OTHER CLIENT.java).
IS IT POSSIBLE WITH THE CODE WRITTEN BELOW?
// Server.Java
import java.net.*;
import java.io.*;
class Server {
public static void main(String[] args) {
boolean finished = false;
try{
ServerSocket listener = new ServerSocket(4444);
while(!finished)
{Socket to_client = listener.accept();
OutputStream out = to_client.getOutputStream();
PrintWriter pout = new PrintWriter(out, true);
pout.println("Hello! this is server talking to you.");
to_client.close();
listener.close();
}// end of try
catch(Exception ie) {
System.out.println(ie);
//Client.Java
import java.net.*;
import java.io.*;
class Client
public static void main(String[] args)
Socket client;
String host="serverpcname";//host is assigned name of the server
try
{InetAddress adressen = InetAddress.getByName(host);
client = new Socket(adressen,4444);
BufferedReader scanf = new BufferedReader(new
InputStreamReader(client.getInputStream()));
String someString = scanf.readLine();
System.out.println("From Server: "+someString);
client.close();
catch(Exception e)
System.out.println(e);
WHEN THE CODE IS EXECUTED(CLIENT.java ON 1 PC & SERVER.java on other) IT GIVES FOLLOWING EXCEPTIONS:
java.net.UnknownHostException: serverpcname: serverpcname
PLZ. GUIDE ME.
THANKS IN ADVANCE.For a server to be accessible on the inetrnet it needs to have an externally visible IP address. For example, an address which starts with 192.168.1 is for internal use only can only be used by other machines on the same internal network. The server's firewall needs to allow the port you are using access and the client has to be able to lookup up the IP address either using the hosts file or via a DNS service. None of these things have anything to do with Java programming, so if you have any more questions I sugegst you try googling them or ask a forum which relates to these issues.
The connection time out is due to the fact that there is no way to contact an inetrnal address over the inetrnet. The host unknwown means you haven't configured your PC to lookup that address. i.e. the host is unknown. -
I have SLS 10.6 running on my local network with DNS configured.
I can access the server from a client on the lan using server.local or server.domain where domain name is my publically registered domain,
From the internet I can access my server using the registered domain name i.e. www.domain.com.
Is it possible to set my server up so that www.domain.com also reaches the server when used by a client locally? At present I get a page not found error.The configuration you're aiming for is called split-horizon or split-brain DNS, and it's quite possible. It can get slightly hairy when you have different stuff using the same host name for different purposes, for instance, and you'll need to track all external DNS entries in your internal DNS server when you're running "split".
Here is how to set up DNS services. Split-horizon is one of the options listed there.
My preference is to use a different domain or subdomain within the network, and to avoid using split-horizon where I can reasonably manage it. One domain name is configured for and reachable outside and is effectively public, and the other domain (or a subdomain) is inside and private and only reachable directly or via VPN, for instance. -
Hi everybody I am trying to Login with my lync Client out of my organization. So I am using lync as a remote user. I am in another organization, and I am using their coporate lan wired and wireless, but I cannot Login to lync in my organization.
I see that I cannot Access my edge Server on port 443 to authenticate directly, I know that Client in this organization use Internet Proxy to browse the Internet. they have a .pac in their ie Settings.
my question is; can lync Client use Internet Proxy Settings to reach the Destination? I mean the Access edge on port 443?
or it can use only Client direct Access to reach the edge Servers?
I Think that the answer is that I use tcp protocol and not http, and maybe that is the reason why I cannot use the Internet Explorer Proxy Settings to reach the Access edge Servers, different maybe is the case I Need to reach the reverse Proxy for live Meetings.
Hope my question is clear.
ThanksProxy settings are used to tell Internet Explorer the network address of an intermediary server (known as a proxy server) that is used between the browser and the Internet on some networks.
Lync client doesn’t use Internet Proxy Setting. You need to access the Edge service directly.
Lisa Zheng
TechNet Community Support -
Hi,
I am new to the servers and domains stuff. Therefore i have setup succesfully a Server 2008 R2 server with AD, DHCP, DNS roles installed. I configured the roles as i wanted and then i installed Exchange Server 2010 so the clients can use Outlook to send
receive mails in and out of the domain.
I can send/receive mails inside the domain (disalfa.com) but i cannot send/receive mails outside the domain. I configured the Exchange properly, i am sure of that. I am 99,9% i did something wrong with the DNS (A records, MX records, etc.).
Also is there something i must do from the control panel of the site i purchased the domain name and the mails?
Can someone guide me so i can manage to work this out?
Server 2008 - 192.168.1.250
Registered Domain - disalfa.com
Thank you in advanceHi ,
I recommend you refer to the following article to configure your external mail flow:
Configure Internet Mail Flow Directly Through a Hub Transport Server
Prerequisites
Register MX resource records for all accepted domains in a public domain name system (DNS) server. Consult the documentation of your DNS provider for information about how to register MX records for your domain. Detailed procedures about how to complete
this step are outside the scope of this topic.
Configure network gateways to allow SMTP traffic to and from the Hub Transport server. Consult the documentation for your network routers and firewalls for information about how to route SMTP traffic to and from the Hub Transport server. Detailed procedures
about how to complete this step are outside the scope of this topic.
Best regards,
Niko Cheng
TechNet Community Support -
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Have you tried clicking on the lock to see it it will then ask for a passwored. Otherwise, try reblooting.
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