Virtual server and client command

Hi,
I want to configure firewall load balancing as follows. I have 3 firewalls, FW1, FW2, FW3. I want to create a serverfarm for each FW, i.e. FW1 in SF1, FW2 in SF2, and FW3 in SF3. Then, we'd like to create two Virtual server VS1 and VS2. Each Virtual server has Server Farm SF2 as a backup server farm. I.e. SF1 is the active server farm for VS1, and SF2 is the backup server farm for VS1. We also have SF3 is the active server farm for VS2, and SF2 is the backup server farm for VS3. Note that all connections to VS1 and VS2 will come from the same VLAN (e.g. VLAN X). So the configuration of the virtual server I think should be as follows ;
vserver VS1
virtual 0.0.0.0 0.0.0.0 25
client 192.168.1.0 255.255.255.0
vserver VS2
virtual 0.0.0.0 0.0.0.0 25
client 192.168.2.0 255.255.255.0
So, the question I have is, will this work if we filter who can access the virtual server using the client commmand ? I.e. clients coming from 192.168.1.0 will be using VS1 and clients coming from 192.168.2.0 will be using VS2.
Thanks !

The 'client' command should work as you expect.
You'll need to add the 'serverfarm' command under each vserver. Ex:
serverfarm SF1
real 1.1.1.1
serverfarm SF2
real 2.2.2.2
serverfarm SF3
real 3.3.3.3
vserver VS1
virtual 0.0.0.0 0.0.0.0 tcp 25
serverfarm SF1 backup SF2
client 192.168.1.0 255.255.255.0
vserver VS2
virtual 0.0.0.0 0.0.0.0 tcp 25
serverfarm SF3 backup SF2
client 192.168.2.0 255.255.255.0
I am assuming that you will be using different IP addresses for each vserver. Is that correct?
~Zach

Similar Messages

MultiThreaded Server and Client connections query.

I have written a MultiThreaded Server to accept incoming client requests.
Multiple clients can connnect to this server and have a conversation.
I invoke the 'MultiServer' from the command line and then invoke 3 clients
from the command line.('Client').
c:> java MultiServer
c:> java Client
c:> java Client
c:> java Client
All the 3 clients now run in their own thread and send messages
to the server.
The problem I am facing is this:
When client1 connects to the server and sends a message to the server (with the server responding)
it works fine.Both Server and Client can exchange messages.
When client2 connects to the server and sends a message and when the server
responds with a message,the message does NOT go to client2,but goes to Client1
As Clients have their own thread to run,shouldnt the messages also be delivered to
individual clients
Am I missing something?
My Code
public class MultiServer {
    public static void main(String[] args) throws IOException {
        ServerSocket serverSocket = null;
        boolean listening = true;
        try {
            serverSocket = new ServerSocket(4444);
            System.out.println("MultiServer listening on Port 4444");
        } catch (IOException e) {
            System.err.println("Could not listen on port: 4444.");
            System.exit(-1);
        // Indefinite Loop.
        while (listening)
         new MultiServerThread(serverSocket.accept()).start();
        serverSocket.close();
public class MultiServerThread extends Thread {
    private Socket socket = null;
    public MultiServerThread(Socket socket) {
     super("MultiServerThread");
     this.socket = socket;
    public void run() {
     try {
         PrintWriter out = new PrintWriter(socket.getOutputStream(), true);
         BufferedReader in = new BufferedReader(
                        new InputStreamReader(
                        socket.getInputStream()));
           BufferedReader stdInFromServer = new BufferedReader(new InputStreamReader(System.in));
        String fromTheClient,fromServer;
           fromServer = "Hi Client,How u doing? ";
        // Send a message from the Server.
           out.println(fromServer);
            while ((fromTheClient = in.readLine()) != null) {
             if (fromTheClient.equals("ByeServer"))
             break;
             // Display message received from Client.
             System.out.print("Client Response : ");
          System.out.println(fromTheClient);
             // Input reply from the Server.
             fromServer = stdInFromServer.readLine();
             out.println(fromServer);
             if (fromServer.equals("Bye."))
                break;
         out.close();
         in.close();
         socket.close();
     } catch (IOException e) {
         e.printStackTrace();
Client Code
===========
public class Client {
    public static void main(String[] args) throws IOException {
        Socket kkSocket = null;
        PrintWriter out = null;
        BufferedReader in = null;
        try {
            kkSocket = new Socket("localhost", 4444);
            out = new PrintWriter(kkSocket.getOutputStream(), true);
            in = new BufferedReader(new InputStreamReader(kkSocket.getInputStream()));
        } catch (UnknownHostException e) {
            System.err.println("Don't know about host: localhost.");
            System.exit(1);
        } catch (IOException e) {
            System.err.println("Couldn't get I/O for the connection to: localhost.");
            System.exit(1);
        BufferedReader stdIn = new BufferedReader(new InputStreamReader(System.in));
        String fromServer;
        String fromUser;
        while ((fromServer = in.readLine()) != null) {
            System.out.println("Server: " + fromServer);
            if (fromServer.equals("Bye."))
                break;
                fromUser = stdIn.readLine();
         if (fromUser != null) {
                out.println(fromUser);
        out.close();
        in.close();
        stdIn.close();
        kkSocket.close();
}

Taking standard input for multiple threads from one console is quite unpredictable. I think the first client thread is waiting for input when you connect the second. You type something into your server window and since the first thread was waiting for input, it takes the input and sends it to client 1.

Windows Media Player no sound while playing a avi file in server and client connection using TCP/IP connection

Hello there
I have a problem with my windows media player while using server and client connection by using TCP/IP connection. So when I play a video using Windows Media Player in LabVIew there isn't any sound come out but when I'm playing a video by a Windows Media Player only the sound will come out. Can you help me solve this problem?
I also upload the vi as the reference.
The username for the client is ihsanhaikalz and the password is ganteng
Thanks
Attachments:
Client Remote.vi ‏746 KB
Server Remote.vi ‏1433 KB

Hi ican,
I was looking at your VI's but I cannot seem to pinpoint exactly where you are using Windows Media Player. In order to more quickly assist you, could you please recreate this issue more concisely in a smaller set of VIs. Also, were you able to get sound when you did not use the TCP/IP connection and simply played the files in LabVIEW?
I noticed in a few places that you were using the Play Sound File.VI from the Graphics and Sounds palette. Is that what you are refering to? I noticed there that the file path that you have designated for the song is simply the song title. Instead, this should be a path to where the song is located on your computer.
Also, if you are planning on using Windows Media Player, have you considered using the ActiveX commands for Windows Media Player? Here are a few examples if you are unfamiliar with this functionality.
Example 1 and Example 2.
I hope this helps!
Kim W.
Applications Engineer
National Instruments

9i installation (network problem b'n server and client

Hi
I installed 9i in windows 2003 server and client system (win xp). I configured listener.ora file in server and tns.ora file in client mechine. while trying to ping (i.e tnsping) i m getting follwoing errors in both systems.
C:\>tnsping tns_tekhub3
TNS Ping Utility for 32-bit Windows: Version 9.2.0.1.0 - Production on 13-DEC-20
06 11:28:25
Copyright (c) 1997 Oracle Corporation. All rights reserved.
Used parameter files:
f:\Orahome92\network\admin\sqlnet.ora
TNS-03505: Failed to resolve name
C:\>

Hi,
i made chages in sqlnet.ora file.
C:\>lsnrctl services
LSNRCTL for 32-bit Windows: Version 9.2.0.1.0 - Production on 14-DEC-2006 09:23:
04
Copyright (c) 1991, 2002, Oracle Corporation. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1)))
Services Summary...
Service "PLSExtProc" has 1 instance(s).
Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:0 refused:0
LOCAL SERVER
Service "tekhub" has 2 instance(s).
Instance "tekhub", status UNKNOWN, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:0 refused:0
LOCAL SERVER
Instance "tekhub", status READY, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:1 refused:0 state:ready
LOCAL SERVER
Service "tekhubXDB" has 1 instance(s).
Instance "tekhub", status READY, has 1 handler(s) for this service...
Handler(s):
"D000" established:0 refused:0 current:0 max:1002 state:ready
DISPATCHER <machine: SERVER, pid: 3684>
(ADDRESS=(PROTOCOL=tcp)(HOST=server)(PORT=1064))
The command completed successfully

WSUS server and client configuration issues

I just inherited WSUS from my predecessor (it was turned off because of a full disk) so I’m still learning how to use it. Turning it back on I changed where updates should come from, they were stored locally and now I’m pulling them down off of the Microsoft
Update location. What I’m seeing is that I have a bunch of computers that WSUS “sees” but are showing “Failed or Needed” status. Unless I visit each machine and manually do the updates this status does not change. Additionally I have some client computers
(Windows 7) that are not showing up as managed by WSUS. If I reading this right I’m running version Update Services 6.2.9200.16384 on Management Console 3.0 Version 6.2 (build 9200) on Windows Server 2012.
How can I force WSUS to automatically update the “Failed and Needed” devices?
How can I get those clients that are not being managed by WSUS to be managed?
Some of the things that I have done so far on the server and clients are:
Create a GPO (see attached for WSUS)
wuauclt
/detectnow
wuauclt /reportnow
wuauclt.exe /detectnow
gpupdate /force after
modifying the GPO
I even ran the SolarWinds WSUS diagnostic (as a non-administrator) and got this as the output:
# Solarwinds® Diagnostic Tool for the WSUS Agent # 1/23/2015
Machine state
User rights: User does not have administrative rights (Administrator rights are not available)
Update service status: Running
Background Intelligent Transfer service status:
Running
OS Version: Windows 8.1 Pro
Windows update agent version:   7.9.9600.17489 (WU Agent is OK)
Windows Update Agent configuration settings
Automatic Update:    Enabled
Options: Automatically download and notify of installation
Use WSUS Server: Not found (There is no such key)
Windows Update Server: Not found (There is no such key)
Windows Update Status Server: Not found (There is no such key)
WSUS URLs are identical: Values are empty
WSUS Server Connectivity -- Connectivity check is impossible
So, my questions are:
What tool do I use to configure the client machine?
How do I get WSUS to update my clients?
Thanks
Sam

Steven,
I'm pretty sure that this is not the right forum to discuss this in but just so we can close this case.
On my computer I ran the command gpupdate /force I
then rebooted my computer to make sure that the group policy would be updated. The first screen shot is from my domain controller and the second is from my computer. As you can see the Domain Controller has the correct settings but the local machine doesn't.
Other parts of the DC GPO settings have worked so I'm somewhat comfortable that it is being propagated properly.

Differences between GKAPI server and client modes

Cisco Gatekeeper External Interface Reference does not talk much about the server and client modes. Does anyone know the different between these 2 modes?

Hi Krishna,
Have a look at the two links below. They provide configuration examples for each of the two topologies along with explanation on the different commands used.
http://docwiki.cisco.com/wiki/Basic_Load_Balancing_Using_Routed_Mode_on_the_Cisco_Application_Control_Engine_Configuration_Example
http://docwiki.cisco.com/wiki/Basic_Load_Balancing_Using_One_Arm_Mode_with_Source_NAT_on_the_Cisco_Application_Control_Engine_Configuration_Example
I hope this helps
Daniel

Try to use one comupter as both server and client

Hello, everyone, I am just trying to use my own computer as both server and client to test some codes about networking. For example, use the sample code in java tutorial which is used to test Echo server(code is listed below). Is there anything I have to do to set my computer, such as set my hostname or something like that?
I am a pure newbie. And the purpose of this question is to test some code including socket on one PC without connect to internet.
I have tried to change the name "taranis" in the following code to the computer name of my own PC, but it doesn't work, and said: Couldn't get I/O for the connection to: (my computer name).
import java.io.*;
import java.net.*;
public class EchoClient {
public static void main(String[] args) throws IOException {
Socket echoSocket = null;
PrintWriter out = null;
BufferedReader in = null;
try {
echoSocket = new Socket("taranis", 7);
out = new PrintWriter(echoSocket.getOutputStream(), true);
in = new BufferedReader(new InputStreamReader(
echoSocket.getInputStream()));
} catch (UnknownHostException e) {
System.err.println("Don't know about host: taranis.");
System.exit(1);
} catch (IOException e) {
System.err.println("Couldn't get I/O for "
+ "the connection to: taranis.");
System.exit(1);
     BufferedReader stdIn = new BufferedReader(
new InputStreamReader(System.in));
     String userInput;
     while ((userInput = stdIn.readLine()) != null) {
     out.println(userInput);
     System.out.println("echo: " + in.readLine());
     out.close();
     in.close();
     stdIn.close();
     echoSocket.close();

Did you write the EchoServer and start it on your
machine, listening on port 7?
You can have the client and server running on the same
machine or different machines, but they have to be
separate pieces of software.
Write a separate EchoServer class that starts up and
listens on that port. Then start the EchoClient and
make the connection.
%yeah, I didn't wrote the EchoServer class. But I thought it is automaticly included and therefore has run once I start my computer.
If I write a EchoServer class, then how should I set the host name of the EchoClient, just simply change "taranis" to my computer name (change "echoSocket = new Socket("taranis", 7);" to echoSocket = new Socket("(my comptuer name)", 7);"?

I am using server and client systems when i am trying to open the browser in two or more machines it says that firefox is already running, i want to open the browser in all machines simeltaniously

I am using server and clients machines in my office, here i want to open browsers in all systems simultaneously but i am unable open the browser, when i am trying to open the browser in the second machine it says that firefox is already open... pls. solve this problem
Thank you

You can't open one Profile more than once. You need a separate Profile for each browser on each PC that you open.
https://support.mozilla.com/en-US/kb/Profiles

Force CORBA server and client to localhost

Hi,
i have to run an omg corba server and client via orbd on a single machine with win xp. The machine is connected to the network, but this is not relevant for the corba communication.
I can now force the orbd to start at localhost. After starting server and client everything works well until disconnecting machine from network, because client and server are started at ip of network card.
How can i force the client and server to use a localhost port for corba communication (client and server)?
Hope anyone has an idea...
br
ralf
P.S.: If I start the applications after disconnecting network everthing works.

Resolved the problem myself.
The correct property is a java system property:
com.sun.CORBA.ORBServerHost=localhost
If you set this property in your application before instanciating an ORB, the orb will be forced to run on the set value (in this case localhost). If you do not set this property the ORB will be started at the IP of your network card if it is active (connected to the network)...

Connection fails if server and clients are in different subnets

Hello,
our Volume License Manager (v2.1) is running in another subnets than the clients (All machines are running under Windows XP-SP2 without Domains or ADS, just workgroups).
The server is in subnet A (192.168.42.0/24), all clients are located in another subnet B (192.168.50.0/24).
Routing is properly configured and is working fine, traffic to the specific hosts is not blocked by a firewall. We can ping every machine,
open telnet connections to the NILM, everything works.
But if the clients try to connect to the remote NILM (both local client NI License Manager and VLM port settings are correct) their connection attempt always
times out with error code "NILM10"
(I already read the mentioned KBs, no solution has helped so far). This is true if clients and server are separated.
For testing purposes, i plugged one client into the server's subnet (server's IP: 192.168.50.250, client 192.168.50.10)
and it worked perfectly. Is there a reason why server and client have to be on the same subnet or is it some other kind of problem that I am not aware of?
Thank you.
Thorsten

Hello Thorsten,
Did you add the server's domain to the client computer's DNS settings. To do this, complete the following steps on the client computer:
1. Open Local Area Network Settings from the Control Panel (Start»Control Panel»Network Connections»Local Area Connection)
2. Click the Properties button
3. Select Internet Protocol (TCP/IP) from the list of network components
4. Click the Properties button
5. Click the Advanced button
6. Change to the DNS tab
7. Ensure Append these DNS suffixes is selected
8. Click the Add button
9. Enter the domain suffix of the license server and click Add
10. Close any open dialog boxes, choosing OK and Close as necessary.
(http://digital.ni.com/public.nsf/allkb/3AAF37CD7B89A2CD86257070005A075A?OpenDocument)
Further you should check this KBs.
Why is My NI License Manager Slow or Not Responsive with a Configured Network Server on Another Domain?
http://digital.ni.com/public.nsf/allkb/27D6BD8116EF257A862572F2005C2181?OpenDocument
How Can I Access NI Volume License Manager from a Different Network or Behind a Firewall?
http://digital.ni.com/public.nsf/websearch/54E52C3F348B929786256DCD0056B19B?OpenDocument
Regards,
WolfgangZ

Time sync between server and client

Hi guys,
I have written a chess server and client. My next step is to implement a clock which will be used in timed games, however, I am not sure of the best solution. I can't think of a reliable method to keep the client's time in sync with the servers because the event latency varies between individual events and clients.
My first idea was to send a 'tick' event every second but I dont think this the best solution. I have seen many applet based clients which have timers, such as Yahoo chess.
I know this question is a little vague, I can give more detail if needed.
Thanks,
Alex

To prevent client-side cheating, the server should keep the
"official" clock. Every so often (perhaps when a move gets made?),
notify both clients of the official time. Clients count seconds from
that official time.
This is a suboptimal solution because it leaves clients vulnerable
to network lag. I can't think of any other solution that doesn't give
clients some responsibility for tracking time, though, and that's a
big security hole.
If you're willing to open that hole, have each client report back to
the server the elapsed local time from when they recieved the
last move to when they made their move. Then update the other
client's clock accordingly.

Data streaming between server and client does not complete

Using an ad-hoc app, data streaming between server
and client does not complete as it supposed to be.
The process runs well in solaris 5.8, however under 5.9
we have found the characters stream buffer length limitation
is around 900 to 950 characters (by default we are using 3072
characters).
Example:
- We are transfering HTML file, which will be displayed
in the App client, with buffer=3072, the HTML only displayed / transfered
as xxxxxxxx characters, but with buffer=900 the HTML is displayed properly,
in this case, the only problem that we have is the file transfer will
eventually longer than usual.
- There is another case, where we have to transfer information (data) as stream
to the client. A long data stream will not appear at all in the client.
Any ideas why the change between 5.8 and 5.9 woudl cause problems?
The current app-driver that we are using is compiled using Solaris 5.6,
if possible we would like to have use of a later version, which is compiled using Solaris 5.9, do you think this will probably solve our problem?
Thanks
Paul

Does this have anything to do with Java RMI? or with Java come to think of it?

Redundant folders created in root of C drive of server and Client . I want to stop the same and want to automatically delete them from server and client .

Redundant folders created in root of C drive of server and Client . I want to stop the same and want to automatically delete them from server and client .
Please let me know the solution to delete them not manually . It should not create automatically .Is there a way we can change the path of creation.
Is there a way that once the folfer is create should be automatically deleted once the task is done.
Redundant folders are created in the root of my C drive all the time,
folder names look like:
09b0508d0bd2dbd70523
56f51b81c1462bb378009ee4d5ed03
02afe4378371907aca40ab

This is a duplicate of
http://social.technet.microsoft.com/Forums/systemcenter/en-US/ae99c2d0-8dea-4c5e-8a79-17e08e9e5de4/sccm-2012-issue-folders-with-long-guid-are-created-in-c-drive?forum=winservergen#ae99c2d0-8dea-4c5e-8a79-17e08e9e5de4
Jason | http://blog.configmgrftw.com

Dns server and client in java

Hello!
Im trying to code a dns server and client in java.
It`s supposed to be a very simple one. The server should just resolve the query, started from the client.
Where can I find any code samples? It would really help me to get started.
Thank you very much!
Anne

Do you have some code ?

How can a VI be both server and client?

Hi,
I'm new in LabView and I'm trying to build a server and client VI using TCP/IP that runs in two computers. in my program I need both server and client VIs to communicate with each other which means I need both VIs to be server and client. I've tried using a case structure but it doesnt work. The only thing I achieved is a normal server/client system where the server sends a request and the client responses.But i need the client to send requests too.i have attached my VIs to this post.I would appriciate it if someone could help with this problem.
Thanks in advanced.
Rambaldi.
Solved!
Go to Solution.
Attachments:
Server-Client.zip ‏41 KB

Do you really need a client and server on each PC? If you simply need that two to talk to each other they can once the client connects to the server. In most cases you only need one server.
What Steve said about the not using the same port only applies to two servers on the same machine. A client must use the port the server is listening to and if the client and the server are on the same machine then they will both use the same port. However, only ONE of them is accepting waiting for connections on that port.
In the code you posted you actually swapped the names. What you call the client is actually the server code and vise versa. In networking a server is an application that listens to an assigned port, accepts connections on that port and provides whatever services it has implemented. A client is an application that establishs a connection to a server. Once a connection is established the two applications can communicate in both directions. The applications themselves will define how the conversation should progress and whether it is a one way conversation or a two way conversation. You don't specify what you are trying to accomplish but I suspect you only need a single server.
In TCP, every connection is defined by the source and destination IP addresses and the source and destination ports. The server uses a known port (FTP is port 21, HTTP is 80, telnet is 23, or some custom port in the user space beyonds the reserved ports) to listen for connections. The client will use the well known port of teh server and generally picks a random port for its port number. The LabVIEW VIs do this automatically. This is how a server and a client on the same computer can use the same port number. Two servers however cannot. The server application can spawn a child task allowing it to service multiple connections at one time though. Each connection will be unique though since the client's port number, address or both will change for each connection.
OK, end of networking 101.
Can you describe in a bit more detail what exactly you want to accomplish. Given that I could probably provide you with more information for your application.
Mark Yedinak
"Does anyone know where the love of God goes when the waves turn the minutes to hours?"
Wreck of the Edmund Fitzgerald - Gordon Lightfoot

Virtual server and client command

Similar Messages

Maybe you are looking for