Kicking out a client from rmi server

I have a few clients on a rmi server .
how can I disconnect a client from the server?
the client is an applet.
I treid calling a method containning System.exit(0)
from the server on to the client but it throws a
java.securtiy .. exception?
so how can I close down the client applet from the server?
thanks

please help
shall I throw a remote exception on the server

Similar Messages

Send Message from RMI Server to RMI Client

Hi,
I want to send message to RMI Client throw RMI server to refresh client's data object as it is database application. I guessed i could implement an interface on client side and i can register my client to the server by sending object to the server. It is not helping it is throwing NULL Pointer exception on server side and it is not refreshing. It seems like it is not passing by reference.
Can any one please guide me with how to send messages to clinet. What is the best way to do it?
-A Thakkar.

You need to elaborate the object model of your client. When you run into this situiation where you might have to sublass two different objects, then you should take a look at breaking the client itself into more than one object.
Let me put it another way: A JFrame is a GUI object; why would you ever try to callback a GUI object? Can't you create - say - a CallbackHandler, and let it initiate further action in the client?

Is it possible to lock the keyboard of a client from a server using java

please explain wheterit is possible to lock the keyboard of a client from a server using java

You want to process code on one machine, and thereby lock the keyboard on another machine? No, that's not possible. It is extremely far from possible.
Of course, if the client is running software with security holes in it you might hack into it and crash the thing. This will lock up the keyboard pretty good. I hope that's not what you want ...
Or are you talking about a setup where you already have code running on the client, and some sort of communication between client and server? In that case what you need to know is whether it is possible to lock the keyboard at all. Once you have figured that out, it is trivial to add the communication code to have the server software tell the client software to lock the keyboard.
So what do you mean with "lock the keyboard"? It's pretty easy to remove/disable all keyboard related listeners in your own application. It's a lot harder (and AFAIK impossible with pure java) to disable alt-tabbing out of the application. And impossible, except from exploiting security holes, to lock the ctrl-alt-delete-combination on windows machine.

How to keep track of client in rmi server

how can I keep track of a disconnected client in a rmi server ?
And what logic do I use to disconnect a client fro mthe server ?

When a RMI client receives a stub to the remote object, RMI client runtime sends a dirty() call to the RMI server runtime which in turn helps the RMI server runtime in updating the client references to the remote object. Client reference is nothing but a unique identification generated by client RMI runtime for that instance of JVM. RMI uses a reference counting algorithm for destroying unreferenced remote objects. Once all references (all clients who are holding the stub to this remote object) to a remote object drops to zero, local garbage collector takes care of freeing this remote object.
RMI client runtime initiates a TCP connection with the remote object only when a method is invoked on the stub. RMI transport layer uses a simple connection pooling mechanism to use already established TCP connections with server objects in further remote method invocations. Let's say the client is invoking a remote method on the remote object's stub fetched from the registry service. Now RMI transport layer initiates a TCP connection with the remote object (exported at ("host1", 4567)). After completion of the remote method, RMI client's transport layer keeps the connection open for some time (some configurable value) to take the advantage of the already established TCP connection in future remote method invocations on remote objects exported on the same host and port ("Host1", 4567"). RMI transport layer also takes care of closing these connections if the connections are idle more than configured value of connection open time.
From the RMI server's perspective, once the RMI server runtime receives a remote method invocation request from the RMI client, it creates a new thread and try to dispatch the method on the designated remote object. After returning the results of the remote method to the client, RMI client's transport layer may not end this conservation with this remote object to take the advantage of this TCP connection in future remote method invocations. So the same thread may be used for dispatching another remote method in future. This is actually the side effect of re-using the established TCP connections on the client side.
RMI server maintains client's reference in the client's reference set of the remote object as long as the client holds a normal reference to remote object's stub in its JVM. Once the client relinquishes the reference to the stub (goes out of the scope or setting it to the null), RMI client automatically sends clean() call to the RMI server runtime to update client reference set of the remote object. There is no public API to lookup or manipulate the client references for a given remote object, but you can always unexport the remote object even some clients are holding stubs to the remote object. Next time when the client invokes the remote method using this stub, client will receive a "connection refused exception" from the server because the remote object is already unexported. Let's say if the RMI server is started again (remote object is exported and registered with registry service), the client once again obtains the stub to the remote object from the registry service instead of using earlier stale stub. (This time remote object may have been exported on different port, so the port details in the old stub may not be valid any more).
At any point of time there can be more than one established TCP connection with the RMI client. This may be the temporary condition; RMI client's transport layer automatically closes these connections if it does not receive any remote method invocation requests with in a pre-determined interval of time (default: 2 min). You can always find out RMI client's host in a given remote invocation by using getClientHost(), but how can you semantically define a "disconnected client in a rmi server" in your application context ? You can always force all the clients to fetch the stub again in future remote method invocations by unexporting the remote object in RMI server. I hope this information helps ...
-- Srinath Mandalapu

Connecting to MYSQL from RMI Server results SQL Communication fail

Hi ,
I have an RMI Server which exports a remote method, which in-turn needs to access content
from the MYSQL Database.
PROBLEM: The code snip for RMI Server is given below. In this getChief() is the remote method called
by the RMI Client running on my same Windows XP machine (ie., localhost).
I get a slew of exceptions when the DriverManager.getConnection() API call occurs in getChief()
via the remote method call from the RMI Client. Two exceptions are the SQL Communications failure and Access Denied Socket Exceptions.
I checked my policy file is OK and MySQL Server is running and my username/password is right in code?
Can you please let me know what am I missing in the RMI Server code?
I also found my code works if the Database Connection API is used within main() rather than inside a Remote
Method...
The Source and Binary are available in my local Windows XP Machine
RMI Server: c:/workspace/DirectoryJava/src/server for and c:/workspace/DirectoryJava/bin/server
RMI Client: c:/workspace/DirectoryJava/src/client for and c:/workspace/DirectoryJava/bin/client
My security policy file is:
grant codeBase "file:/workspace/DirectoryJava/bin" {
permission java.security.AllPermission;
permission java.net.SocketPermission "*:1024-65535", "listen,connect,accept,resolve";
permission java.net.SocketPermission "*","listen,connect,accept,resolve";
grant codeBase "file:/workspace/DirectoryJava/bin/client" {
permission java.security.AllPermission;
permission java.net.SocketPermission "*:1024-65535", "listen,connect,accept,resolve";
permission java.net.SocketPermission "*","listen,connect,accept,resolve";
grant codeBase "file:/workspace/DirectoryJava/bin/server" {
permission java.security.AllPermission;
permission java.net.SocketPermission "*:1024-65535", "listen,connect,accept,resolve";
permission java.net.SocketPermission "*","listen,connect,accept,resolve";
grant codeBase "file:/workspace/DirectoryJava/bin/directory" {
permission java.security.AllPermission;
permission java.net.SocketPermission "*:1024-65535", "listen,connect,accept,resolve";
permission java.net.SocketPermission "*","listen,connect,accept,resolve";
grant codeBase "file:/workspace/DirectoryJava/src/client" {
permission java.security.AllPermission;
permission java.net.SocketPermission "*:1024-65535", "listen,connect,accept,resolve";
permission java.net.SocketPermission "*","listen,connect,accept,resolve";
grant codeBase "file:/workspace/DirectoryJava/src/server" {
permission java.security.AllPermission;
permission java.net.SocketPermission "*:1024-65535", "listen,connect,accept,resolve";
permission java.net.SocketPermission "*","listen,connect,accept,resolve";
grant codeBase "file:/workspace/DirectoryJava/src/directory" {
permission java.security.AllPermission;
permission java.net.SocketPermission "*:1024-65535", "listen,connect,accept,resolve";
permission java.net.SocketPermission "*","listen,connect,accept,resolve";
};I checked that mysqld.exe is running at port 3306 and am able to connect to and use it via
MySQL Command Client successfully.
Thanks in advance.
The Exception list is pasted below.
c:\workspace\DirectoryJava\bin>java -cp "c:/workspace/Directory
Java/bin/Directory.jar;c:/workspace/DirectoryJava/bin/server;c:/workspac
e/DirectoryJava/bin;C:/Program Files/MySQL/mysql-connector-java-5.1.6/my
sql-connector-java-5.1.6-bin.jar" -Djava.rmi.server.codebase=file:/c:/workspace/
DirectoryJava/bin/Directory.jar -Djava.security.policy=wideopen.policy
server.DirectoryEngine
DirectoryEngine bound
getChief() Called
SQLException: Communications link failure
Last packet sent to the server was 0 ms ago.
SQLState: 08S01
VendorError: 0
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link fai
lure
Last packet sent to the server was 0 ms ago.
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Sou
rce)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1
074)
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2103)
at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:718)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Sou
rce)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:302)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java
:282)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at server.DirectoryEngine.getChief(DirectoryEngine.java:91)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at sun.rmi.server.UnicastServerRef.dispatch(Unknown Source)
at sun.rmi.transport.Transport$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(Unknown Sou
rce)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(Unknown Sour
ce)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.net.SocketException: java.security.AccessControlException: acces
s denied (java.net.SocketPermission 127.0.0.1:3306 connect,resolve)
at com.mysql.jdbc.StandardSocketFactory.unwrapExceptionToProperClassAndT
hrowIt(StandardSocketFactory.java:404)
at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.ja
va:265)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:280)
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2026)
... 26 moreCODE SNIP:
=========
public class DirectoryEngine implements Directory {
public DirectoryEngine() {
super();
public Employee getChief() throws RemoteException {
Statement stmt = null;
ResultSet rs = null;
Employee emp = null;
// TODO Auto-generated method stub
try {
System.out.println("getChief() Called");
Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306",
"<username>","<password>");
// Username and Password were replaced with root username and password in my original code
System.out.println("getConnection() Called");
stmt = conn.createStatement( ResultSet.TYPE_SCROLL_SENSITIVE,
ResultSet.CONCUR_READ_ONLY);
System.out.println("createStatement() Called");
rs = stmt.executeQuery("use mysql");
} catch (SQLException ex) {
// handle any errors
System.out.println("SQLException: " + ex.getMessage());
System.out.println("SQLState: " + ex.getSQLState());
System.out.println("VendorError: " + ex.getErrorCode());
ex.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
} finally {
// it is a good idea to release
// resources in a finally{} block
// in reverse-order of their creation
// if they are no-longer needed
if (rs != null) {
try {
rs.close();
} catch (SQLException sqlEx){
// ignore
rs = null;
if (stmt != null) {
try {
stmt.close();
} catch (SQLException sqlEx) {
// ignore
stmt = null;
return emp;
} /* getChief() ends */
public static void main(String[] args) {
if (System.getSecurityManager() == null) {
System.setSecurityManager(new SecurityManager());
try {
String name = "Directory";
Directory engine = new DirectoryEngine();
Directory stub =
(Directory) UnicastRemoteObject.exportObject(engine, 0);
Registry registry = LocateRegistry.getRegistry();
registry.rebind(name, stub);
Class.forName("com.mysql.jdbc.Driver").newInstance();
System.out.println("DirectoryEngine bound");
} catch (Exception e) {
System.err.println("DirectoryEngine exception:");
e.printStackTrace();
} /* end DirectoryEngine class */

It looks there is some permission issue.
Can you please try once with below policy and let me know the result.
grant {
permission java.security.AllPermission;
};

Host Custom client from TES server?

I am working on a custom webapp client for Cisco Tidal Enterprise Scheduler that will let me quickly view running jobs, restart jobs, etc. (similar to the iOS app offers). The intent is to only show the features that I want and need quick access to. My plan is to write everything in HTML5 and Javascript (no server side scripting). I've quickly realized that my XmlHttpRequests and Ajax requests to the TES REST API are failing because of the Same Origin Policy enforced by browsers which prevents cross site scripting. I am currently developing locally on my personal machine and so the requests are originating from outside of the TES domain.
Is it possible to host my custom web client from the Tidal Server itself, and is this likely to fix the cross site origin issues I am having? Does anyone have advice regarding this issue? I am relatively new to Tidal and appreciate any help regarding this.

Thanks for your input. Yeah, the article has been there for quite sometimes. That's why I am a bit sceptical about using it. The strange thing is that there has not been any updates about this topic since then (searched in google and not many web pages are mentioning this thing). I am wondering whether it is a good choice to change the code or not.

Disconnecting clients from Streaming Server

Hello,
We have Streaming Server installed to stream online-seminars to the clients. We want to manually disconnect some clients during the translation while leaving others online. What is the way to do it? Clients connect to server by opening a web-page on the other web-server with embedded flash player which has the source streamer uri rtmp://our_server/live.
Thank you,
Olga Butygina.

Спасибо за ответ!
У нас как раз php-сайт c данными о клиентах в mysql, так что предлагаемый вариант - то что надо. Одна проблема: мы используем уже готовый плеер (http://www.longtailvideo.com/players/jw-flv-player/) и не задумывались о разработке собственного флэшового плеера.
Разреши задать тебе пару вопросов.
1. Такой плеер, способный общаться с php-сервером, можно написать на Flex в свободном IDE или же требуется Flash Professional? Насколько я знаю, во Flash уже есть готовый компонент FLVPlayBack, можно ли без него обойтись во Flex?
2. С помощью Loadvars можно также посылать серверу информацию о запуске проигрывателя для пополнения счетчика просмотров или есть более простой способ внедрить такой посыльщик запроса в обычный swf, содержащий видео?
С уважением,
Ольга Бутыгина.

Can't authenticate Mac VPN client from RADIUS server

Hello,
I'm a real noob here so please bear with me.
I have been able to configure my PIX 515E to allow VPN connections onto my network, but what I need to do is set up some sort of user authentication to control access at a user level. From what I've read here and in the Configuration Guide I should be able to do this authentication with a RADIUS server. I'm running a Corriente Networks Elektron Security server which has RADIUS server capabilities. It is running on my (inside) interface at IP 192.168.10.26.
I thought that I had everything configured properly but it never seems to authenticate. I connect, the XAUTH window pops up, I add my username and password as it's configured on my RADIUS server, but when I click OK it just cycles the progress bar at the bottom and eventually times out. The client log doesn't show me anything and the log on the RADIUS server shows me nothing. Any ideas? this seems like it should be simple because I can connect until I attempt to authenticate to the RADIUS server.
TIA for any direction you can provide me.
Christine

If it helps, here is my config with a some of the non-related bits deleted:
interface ethernet0 auto
interface ethernet1 auto
interface ethernet2 auto
nameif ethernet0 outside security0
nameif ethernet1 inside security100
nameif ethernet2 DMZ security50
enable password ********* encrypted
passwd ******* encrypted
hostname pixfirewall
domain-name acme.com
fixup protocol dns maximum-length 512
fixup protocol ftp 21
fixup protocol http 80
fixup protocol http 82
fixup protocol rsh 514
fixup protocol rtsp 554
fixup protocol sip 5060
fixup protocol sip udp 5060
fixup protocol skinny 2000
fixup protocol smtp 25
access-list inside_outbound_nat0_acl permit ip any 192.168.10.0 255.255.255.0
access-list inside_outbound_nat0_acl permit ip host 192.168.10.26 192.168.10.192 255.255.255.224
access-list inside_outbound_nat0_acl permit ip host 192.168.10.69 192.168.10.192 255.255.255.224
access-list outside_cryptomap_dyn_20 permit ip any 192.168.10.0 255.255.255.0
access-list outside_cryptomap_dyn_40 permit ip any 192.168.10.192 255.255.255.224
mtu outside 1500
mtu inside 1500
mtu DMZ 1500
ip address outside 207.XXX.XXX.130 255.255.255.0
ip address inside 192.168.10.1 255.255.255.0
ip address DMZ 192.168.100.1 255.255.255.0
multicast interface inside
ip audit info action alarm
ip audit attack action alarm
ip local pool CBI_VPN_Pool 192.168.10.201-192.168.10.220
pdm location 192.168.10.50 255.255.255.255 inside
pdm group CBI_Servers inside
pdm logging warnings 100
pdm history enable
arp timeout 14400
global (outside) 200 interface
global (DMZ) 200 interface
nat (inside) 0 access-list inside_outbound_nat0_acl
nat (inside) 200 192.168.10.0 255.255.255.0 0 0
static (inside,outside) 207.XXX.XXX.150 192.168.10.27 netmask 255.255.255.255 0 0
static (inside,outside) 207.XXX.XXX.132 192.168.10.26 dns netmask 255.255.255.255 0 0
access-group 100 in interface outside
route outside 0.0.0.0 0.0.0.0 207.XXX.XXX.129 1
timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 rpc 0:10:00 h225 1:00:00
timeout h323 0:05:00 mgcp 0:05:00 sip 0:30:00 sip_media 0:02:00
timeout uauth 0:05:00 absolute
aaa-server radius-authport 1812
aaa-server radius-acctport 1812
aaa-server TACACS+ protocol tacacs+
aaa-server RADIUS protocol radius
aaa-server RADIUS (inside) host 192.168.10.26 ************* timeout 10
aaa-server LOCAL protocol local
http server enable
http 192.168.10.3 255.255.255.255 inside
no floodguard enable
sysopt connection permit-ipsec
crypto ipsec transform-set ESP-DES-MD5 esp-des esp-md5-hmac
crypto dynamic-map outside_dyn_map 20 match address outside_cryptomap_dyn_20
crypto dynamic-map outside_dyn_map 20 set transform-set ESP-DES-MD5
crypto dynamic-map outside_dyn_map 40 match address outside_cryptomap_dyn_40
crypto dynamic-map outside_dyn_map 40 set transform-set ESP-DES-MD5
crypto map outside_map 65535 ipsec-isakmp dynamic outside_dyn_map
crypto map outside_map client authentication RADIUS
crypto map outside_map interface outside
crypto map inside_map interface inside
isakmp enable outside
isakmp nat-traversal 3600
isakmp policy 20 authentication pre-share
isakmp policy 20 encryption des
isakmp policy 20 hash md5
isakmp policy 20 group 2
isakmp policy 20 lifetime 86400
vpngroup Test_VPN address-pool CBI_VPN_Pool
vpngroup Test_VPN dns-server 142.77.2.101 142.77.2.36
vpngroup Test_VPN default-domain acme.com
vpngroup Test_VPN idle-time 1800
vpngroup Test_VPN authentication-server RADIUS
vpngroup Test_VPN user-authentication
vpngroup Test_VPN user-idle-timeout 1200
vpngroup Test_VPN password ********
ssh timeout 5
console timeout 0
dhcpd address 192.168.10.100-192.168.10.254 inside
dhcpd dns 142.77.2.101 142.77.2.36
dhcpd lease 3600
dhcpd ping_timeout 750
dhcpd auto_config outside
dhcpd enable inside

NFS - Solaris 10 client from Ubuntu server gives Rpcbind error

Hello All,
New to Solaris, and I've been scouring the Internet to find a solution, but none have been produced. I'll start by giving you details about the setups, and then go into the error:
Server Setup:
Ubuntu 8.04
Exports file ->
/home/<folder> <Solaris 10 Server DNS name>(rw,no_subtree_check,async)
Client Setup:
Solaris 10
Set /etc/default/nfs to have NFS_CLIENT_VERSMAX=3
Ran svcadm -v enable -r network/nfs/client and then tried
mount -F nfs <Ubuntu Server DNS name>:/home/<folder> /mnt/test/
and all I ever get are Rpcbind failure - RPC: Timed Out and then it says it's retrying: /mnt/test
I've gotten the firewall out of the way, I can ping the Ubuntu server from the Solaris server and vice versa, and I'm able to mount the Ubuntu NFS share on another Ubuntu machine perfectly, but I can't get it to mount on the Solaris server. If I specify v3 of NFS, that doesn't change anything. If I specify v4 of NFS, I get the error that the file or folder doesn't exist on the Ubuntu server.
Any ideas? Any more info needed?

This is the exact same problem I've been having. My server is Ubuntu 8.10, and the client is Solaris 10. This is on my home network, so I'm pretty confident it isn't a network issue. I do NFS all the time at work between Solaris machines, but I'm stumped on this one. I've noticed there are similar threads on the topic with no real answer that I have found --
http://www.linuxquestions.org/questions/linux-networking-3/nfs-server-on-ubuntu-doesnt-play-nice-with-nfs-client-on-solaris-626508/
I did a dfshares from the Solaris box, and I actually get a response listing the shares. Even though I can see it I still can't mount it. Here is what I see:
bash-3.00# dfshares tabasco
RESOURCE SERVER ACCESS TRANSPORT
tabasco:/media/Shared tabasco - -
bash-3.00# mount -F nfs -o ro tabasco:/media/Shared /mnt
nfs mount: tabasco:/media/Shared: No such file or directory
bash-3.00#
NFS is working on the server, as I can mount it locally (see below)
root@tabasco:/# cat /etc/exports
/media/Shared *(ro,sync)
root@tabasco:/# mount tabasco:/media/Shared /mnt
root@tabasco:/# cd /mnt
root@tabasco:/mnt# ls
Videos lost+found Music Pictures Other
root@tabasco:/mnt#
Yes... my server''s name is tabasco... remember it's a home network... and I like Tabasco... :)

Remove the updates Installed to the client from WSUS SERVER

WSUS Server running on the Windows Server 2008 R2. Is there a way to get rid of updates that have been pushed out and installed on all client computers? because currently I am running out of disk space and I really don't want to increase the disk space
further more.
I tried the Server Cleanup Wizard but it didn't help much as it only cleans out unnecessary and declined updates.

Hi,
On current situation, please refer to the following article and check if can help you.
What
to do when your WSUSContent folder grows too large
Based on your description, I understand that you know which updates had been installed. In other words, you
know which updates will never be used. In WSUS server, please navigate to those updates and right click them, then select
Decline. (Please note: if have downstream replica servers,
please don’t Decline these updates directly). Then please run the Server Cleanup Wizard again and monitor the result. If anything I misunderstand, please don’t hesitate to let me know.
In addition, this issue seems to be more related to WSUS configuration. As Dave suggested, posting this question
in
WSUS Forum will be better. I believe we will get a better assistance there.
If any update, please feel free to let us know.
Hope this helps.
Best regards,
Justin Gu

Monitoring an applet on a thin client from the server

Hello all,
I'm not even sure if this is possible or not, but here is what I would like to do.
I want to be able to monitor an applet running on a remote thin client device from the central server to determine if there have been any problems (exceptions, device failures, etc).
I'll be using java 1.5.0. If you require more info please let me know.
Thanks,

But would anyone know if there is a similar method for applets?
What makes you think you can't use that technique in an applet? Use that, and contact the server when there's an uncaught exception.
You'll probably want to report a number of caught exceptions too (unless you're really bad at handling exceptions).
Best bet is to use a utility class on your applet with a method like "logError(Throwable t, String message)" which will send the details up to the server, maybe output to the console, maybe even pop up a dialog. If you did this via an interface you could plug in different implementations and compound them if required.

Installing printer drivers on x86 and x64 OS clients from print server

Hi experts,
I have a print server win 2008 r2 with some printers installed on it including x86 and x64 drivers.
1. I wanted to install printer drivers on x86 and x64 CLIENT OS (win 7/8 ) from the print server.
2. This installation should in in backend(hide mode). While installing it should not pop up on user desktop for installation.
Could any one help me with a simple script. So i can get a get a idea.
I was using bellow script but it displays on desktop before installation.
$nw=New-Object -ComObject WScript.Network
$nw.AddWindowsPrinterConnection('\\ptprint\pg1-b')

Hi Amitkumar,
given your scenario, this script is probably what you are looking for:
Add-PrinterDriver
It will add all printerdrivers from shared printerobjects from a printer server.
Cheers,
Fred
There's no place like 127.0.0.1

Send data to multiple clients from a server

My problem statement is this:
A server is created, say X. Multiple clients are created, say A, B & C. If X sends a message to A it should reach only A and should not go to B or C. Similarly if X sends message to B it should not reach A or C. I made a one to one communication with the following code:
//Server
import java.io.*;
import java.net.*;
class X
public static void main(String args[])throws Exception
ServerSocket ss=new ServerSocket(4321);
try
Socket s=ss.accept();
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
DataOutputStream out = new DataOutputStream(s.getOutputStream());
String str=in.readLine();
out.writeBytes(str+"\n");
s.close();
ss.close();
catch (IOException e){}
//Client A
import java.io.*;
import java.net.*;
class A
public static void main(String args[])throws Exception
try
Socket s=new Socket("localhost",4321);
BufferedReader in=new BufferedReader(new InputStreamReader(s.getInputStream()));
System.out.println(in.readLine());
s.close();
catch(Exception e){}
}But i dont know how to keep track of each client. Because all the clients sockets are created at the same port, ie. 4321. I think thread will help. But even then i dont know how to identify each client. Somebody please help. Thanks in advance.
Edited by: sowndar on Dec 5, 2009 1:21 AM

YoungWinston wrote:
sowndar wrote:
Ok. I think i have to attach an unique ID to each client message. So that, with the help of that ID, the server can identify each client. Have i caught ur point?If you don't mind using a port per client, you could do something like a receptionist taking incoming calls (on 4321 only).
- Hi I'm Client xyz.
- Hi Client xyz, please call me back on port abcd and I'll put you straight through to our server.
Since 4321 is an "open line" you might have to have some sort of ID so that Clients know which return messages are meant for them, but messages on the other ports would all be direct Client to Server. Also, the Server is then is charge of port allocation and communication on the "open" port is kept to a minimum.4321 is the socket that the server is listening to. It's not what the actual communication will be carried out over. Run this, then telnet to port 12345 a few times
public class TestServerSocket {
public static void main(String[] args) throws Exception {
          ServerSocket server = new ServerSocket(12345);
          while (true) {
               Socket socket = server.accept();
               System.err.println(socket.getPort());
}Notice how each inbound connection is allocated a unique outbound socket.

Cannot ping RRAS Client from RRAS server.

I have recently created an RRAS pptp connection for an outside network. The RRAS client connects fine and can ping the RRAS server and every device on the RRAS servers local network. The RRAS server cannot ping the remote pptp client nor can any device on
the RRAS servers local network. RRAS is configured to be within the same subnet as the RRAS servers local network. On connection it pulls from a static IP pool.
Any help is truly appreciated

The server is behind a nat device and for testing purposes i have disabled the firewall on both devices. Also I am having an issue where the pptp connection just stops accepting and sending data to the rras server but if you look at the active connections
the client never disconnects. I have attached ipconfig information
CLIENT
Windows IP Configuration
   Host Name . . . . . . . . . . . . : Fellows-PC
   Primary Dns Suffix . . . . . . . :
   Node Type . . . . . . . . . . . . : Hybrid
   IP Routing Enabled. . . . . . . . : No
   WINS Proxy Enabled. . . . . . . . : No
PPP adapter Welsh:
   Connection-specific DNS Suffix . :
   Description . . . . . . . . . . . : Welsh
   Physical Address. . . . . . . . . :
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
   IPv4 Address. . . . . . . . . . . : 172.16.128.66(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.255
   Default Gateway . . . . . . . . . :
   NetBIOS over Tcpip. . . . . . . . : Enabled
Ethernet adapter Local Area Connection:
   Connection-specific DNS Suffix . :
   Description . . . . . . . . . . . : Realtek PCIe GBE Family Controller
   Physical Address. . . . . . . . . : BC-5F-F4-75-C5-AD
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
   Link-local IPv6 Address . . . . . : fe80::5418:aba9:4af2:1e12%11(Preferred)
   IPv4 Address. . . . . . . . . . . : 192.168.1.2(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Lease Obtained. . . . . . . . . . : Wednesday, March 26, 2014 8:35:58 AM
   Lease Expires . . . . . . . . . . : Saturday, March 29, 2014 8:35:58 AM
   Default Gateway . . . . . . . . . : 192.168.1.1
   DHCP Server . . . . . . . . . . . : 192.168.1.1
   DHCPv6 IAID . . . . . . . . . . . : 247226356
   DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-18-C3-16-85-BC-5F-F4-75-C5-AD
   DNS Servers . . . . . . . . . . . : 75.75.75.75
                                       75.75.76.76
   NetBIOS over Tcpip. . . . . . . . : Enabled
Tunnel adapter isatap.{DF8CAC0D-588D-495A-9185-78C9992DC12F}:
   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix . :
   Description . . . . . . . . . . . : Microsoft ISATAP Adapter
   Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
Tunnel adapter Teredo Tunneling Pseudo-Interface:
   Connection-specific DNS Suffix . :
   Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
   Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
   IPv6 Address. . . . . . . . . . . : 2001:0:9d38:6abd:1c88:1312:b8c2:97a9(Pref
erred)
   Link-local IPv6 Address . . . . . : fe80::1c88:1312:b8c2:97a9%12(Preferred)
   Default Gateway . . . . . . . . . : ::
   NetBIOS over Tcpip. . . . . . . . : Disabled
Tunnel adapter isatap.{D8973397-8880-4110-A7F9-4D1F6A1C2E8C}:
   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix . :
   Description . . . . . . . . . . . : Microsoft ISATAP Adapter #2
   Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
SERVER
Windows IP Configuration
   Host Name . . . . . . . . . . . . : IMS
   Primary Dns Suffix . . . . . . . :
   Node Type . . . . . . . . . . . . : Unknown
   IP Routing Enabled. . . . . . . . : Yes
   WINS Proxy Enabled. . . . . . . . : Yes
PPP adapter RAS Server (Dial In) Interface:
   Connection-specific DNS Suffix . :
   Description . . . . . . . . . . . : WAN (PPP/SLIP) Interface
   Physical Address. . . . . . . . . : 00-53-45-00-00-00
   DHCP Enabled. . . . . . . . . . . : No
   IP Address. . . . . . . . . . . . : 172.16.128.65
   Subnet Mask . . . . . . . . . . . : 255.255.255.255
   Default Gateway . . . . . . . . . :
Ethernet adapter Local Area Connection:
   Media State . . . . . . . . . . . : Media disconnected
   Description . . . . . . . . . . . : Broadcom BCM5709C NetXtreme II GigE (NDIS
VBD Client)
   Physical Address. . . . . . . . . : 00-10-18-8D-BC-42
Ethernet adapter Local Area Connection 2:
   Media State . . . . . . . . . . . : Media disconnected
   Description . . . . . . . . . . . : Broadcom BCM5709C NetXtreme II GigE (NDIS
VBD Client) #2
   Physical Address. . . . . . . . . : 00-10-18-8D-BC-40
Ethernet adapter Local Area Connection 4:
   Media State . . . . . . . . . . . : Media disconnected
   Description . . . . . . . . . . . : Broadcom BCM5716C NetXtreme II GigE (NDIS
VBD Client)
   Physical Address. . . . . . . . . : 84-2B-2B-68-6A-FA
Ethernet adapter Local Area Connection 3:
   Connection-specific DNS Suffix . :
   Description . . . . . . . . . . . : Broadcom BCM5716C NetXtreme II GigE (NDIS
VBD Client) #2
   Physical Address. . . . . . . . . : 84-2B-2B-68-6A-F9
   DHCP Enabled. . . . . . . . . . . : No
   IP Address. . . . . . . . . . . . : 172.16.128.1
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Default Gateway . . . . . . . . . : 172.16.128.254
   DNS Servers . . . . . . . . . . . : 172.16.128.254
                                       75.75.75.75
   NetBIOS over Tcpip. . . . . . . . : Disabled

How to move client from one server to other at remote location

Dear All,
We have two servers located in two different locations.Due to some network issues i am unable to do the remote client copy .
Please suggest how do i take client 100 to other server which is at different location and on different platform.
Source system is HP Unix Target system is on windows2003, database is oracle on both servers.
Regards,
Najeeb ..

Dear Shark,
Please check whether you have set archive logs.
If you have set then please disable, it since it will increase size of /oracle/SID/oraarch.
then you need to take achive backup. so all the above please ensure that no archive logs are generated.
also check the size of PSAPUNDO and PSAPTEMP tablespace and if possible make its size large.
Have you enabled Automated Undo managemant. if your database is oracle9 then you need to manually provide AUM or else it is automatic in higher oracle DB.
Check the logs of Client copy using scc3.. all the best for all.
Regards,
Ganesh

Kicking out a client from rmi server

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