Pls help : How to get the client ip address in EJB

Hi experts,
I need to find the ip addr of the client which makes the remote call.
I tried using
java.rmi.server.RemoteServer.getClientHost()
But it throws ServerNotActiveException .
When I tried this in RMI it works fine perfectly.
If i am right EJB is just similar to RME and it should work in it too..
Can you please help me in finding out the ip address of the client which makes the ejb call.
Thanks & Regards,
Mukunt

Hi Mukunt,
There is no portable way to do this in the Remote EJB programming model. The bean class
is written in a way that is agnostic to those kind of plumbing-related details of the caller.
--ken

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How can I get the client IP address correctly?

Hi,
I am having a problem with getting the client ip address correctly using jsp. I am currently using the method request.getRemoteAddr() (JSP)to get the remote client IP. This method works fine with intranet addresses.
However, when I am using a dial-up connection through a ISP (internet service provider), it could not detect the actual IP that is assigned to my client PC, but instead got another IP address.
Could anyone advise me on that? And could anyone advise me on how to obtain the correct client ip address correctly using any of the java technologies?
Thanks,
Damien

>
I don't believe so. You can't establish aconnection
over the internet using a private IP. As far as I
know most, if not all routers, block them so itwon't
even move over the backbone.Well with port-mapping it is definately possible to
allow an external ip to "connect" to an internal ip, i
have done this very thing myself...Not the same.
You are addressing the external server with a public IP address. That is then translated into the internal connection.
That is not the same as using a private IP on the internet.
As I said, the backbone will not let a private IP through.
>
>
Yes, but my point is that at any given time, in the
world, many boxes might have one address. Even ifit
is a private IP is it still that IP for aparticular
box. So if you use java to get its IP that is theIP
that it gets. And that IP is useless for anything
unless that IP is meaningful for the othercomputer.
But all ips must be unique in a designated "internet"
be it an "intranet" or whatever, there cannot be a
situation where two identical ips in the same
"internet", such that an ip that is achieved from a
page-hit is valid and meangingful in order to send the
data it is requesting back to it, or find out more
about that computer, or log and report it if it is
doing something illegal; i don't think its that
meangingless is it?Yes it is. You can't use an IP to uniquely identify a box, and that is the sole criteria, when there might be two boxes with the same IP.
When you use java on a client box to get the IP of the box, it doesn't necessarily return an IP that it meaningful to the anyone outside the lan on which the box lives.
Because of this internet systems must do one of the following:
-Do not use the IP as an identifier.
-Require that the client has a public IP. This is often static. At least some security systems use this to validate users.

Get the client IP address

Hello everybody, I'm a student new with java, I'm developing a little server application - running standalone, and I'm trying to get the client Ip address, have a look on my code snippet:
InetAddress fromcli;
while(true){
welcomeSKT.accept()
fromcli = welcomeSKT.getInetAddress();
System.out.println("The client Ip Address is: " + fromcli.getHostAddress() + '\n');
The sysout println returns the 0.0.0.0 that is the server address, mapped to more than one interface eg:(loopback and eth0) - But if with the getInetAddress() method I get the server address where is the difference with the getLocalHost()? - By the way, anyone has a suggestion to print out the client remote address.
Thank you in advance....
Jeppojeps
Edited by: jeppojeps on Mar 24, 2008 3:36 AM

Oh, sorry of course welcomeSKT is a ServerSocket, actually the snippet that I put is a part of the code, here below I put the complete program, in order to clarify my question, however I would like to know if it's possible to understand from the server side the client IP address, and if yes how...
Thank you in advance...
* THIS simple TCP server receives some numbers in input by the client and give back the sum - actually the exceptions are managed in a uncomplete way....but this is my first java program...be patient with me...
* @jeppojeps
* @0.1
import java.io.*;
import java.net.*;
public class ServerTCP
// instance variables - replace the example below with your own
public static void main(String[] args) throws Exception
String clientSentence;
String capitalized;
InetAddress fromcli;
String clientIp;
String portIp;
int z=0;
int port=0;
if (args.length == 0 ){
System.out.println("Usage: ServerTCP lport" + '\n');
System.exit(-1);
else
port = Integer.parseInt(args[0]);
if(port <= 1024) {
System.out.println("Remember dude, only root can use a portnumber < 1024" + '\n');
else{
ServerSocket welcomeSKT = new ServerSocket(port);
System.out.println("Server instance started:" + '\n');
while(true){
Socket connectionSocket = welcomeSKT.accept();
BufferedReader InfromClient = new BufferedReader (new
InputStreamReader(connectionSocket.getInputStream()));
DataOutputStream outToClient =
new DataOutputStream(connectionSocket.getOutputStream());
outToClient.writeBytes("Hello give me some numbers and I'll give you the sum" + '\n');
fromcli = welcomeSKT.getInetAddress();
System.out.println("The client Ip Address is: " + fromcli.getHostAddress() + '\n');
clientSentence = InfromClient.readLine();
for(int i = 0 ; i < clientSentence.length() ; i++) {
try {
Character c = new Character(clientSentence.charAt(i));
capitalized = c.toString();
int x = Integer.parseInt(capitalized);
System.out.println("Number digited from the client: " + x + '\n');
z+=x;
catch(NumberFormatException nfe) {
System.out.println("Text: " + clientSentence.charAt(i));
capitalized = Integer.toString(z);
outToClient.writeBytes("The sum of the given number is: " + capitalized + '\n');
welcomeSKT.close();
}

How to get the client date and time ?

Dear Sirs...
Using jdeveloper 10.1.2.0
How can i get the client date and time using the HttpServletRequest ?
thanks for any help in advance
best regards

If your code is running on the client pc you can just create a new instance of the java.util.Date class. That class automatically defaults to the current time of the client machine. Otherwise if you're running the code on the server, you could insert/post the client date/time by adding its string representation as a parameter to the HTTP request object.
Ronald

How to get the client identity from the certificate at server side

hi, this is ravi kiran,
I am working on a project which requires, receiving a signed file from the client side and verify whether the file is signed by a valid certificate that is there in the servers keystore.
How can i get the client certificate at server side and check with the certificates already present in the servers keystore.
i have no idea how to do this
can any one help me
thanx in advance

Hi Ravi, did you get any answer to your question ?
I'm also after a similar problem, please share your solution, if you have any.

GSS-API How to get the client-to-service ticket

In Kerberos when requesting services, the client sends the following two messages to the TGS: A composed message of the Ticket-Granting Ticket and the ID of the requested serviceand authenticator (which is composed of the client ID and the timestamp), all encrypted using the client/TGS session key.
Then upon receiving these messages the TGS sends the followings to the client:
A: Client-to-server ticket (which includes the client ID, client network address, validity period and Client/server session key) encrypted using the service's secret key.
B: Client/server session key encrypted with the client/TGS session key.
Now I'm wondering how to obtain A and B throught the kerberos login in GSS-API . I have the following code that I use to request a kerberized service but it returns only a KerberosTicket in PrivateCredentialsSet for the Subject. A sessionKey can also be obtained form this KerberosTicket ! Which session key is this ? the session key B described above? and Where to get the Client-to-server ticket (A) described above ?
Thanks for any help !
Alex
lc = new LoginContext("login-client", new TextCallbackHandler());
lc.login();
mysubject = lc.getSubject();
java.util.Set principals = lc.getSubject().getPrincipals();
java.util.Iterator iterador = principals.iterator();
if (iterador.hasNext()){
KerberosPrincipal principal = (KerberosPrincipal) iterador.next();
clientName =principal.getName();
PrivilegedAction generateServiceTicket = new ClientAction(clientName,"[email protected]");
Subject.doAs(mysubject, generateServiceTicket);
Set prvCredentials = lc.getSubject().getPrivateCredentials();
for (Iterator i = prvCredentials.iterator(); i.hasNext(); j++) {
KerberosTicket ticket = (KerberosTicket) i.next();
prvKrbCrds = (KerberosTicket[]) mysubject.getPrivateCredentials().toArray(new KerberosTicket[0]);
public Object run() {
try{
GSSManager manager = GSSManager.getInstance();
Oid krb5Mechanism = new Oid("1.2.840.113554.1.2.2");
Oid krb5PrincipalNameType = new Oid("1.2.840.113554.1.2.2.1");
GSSName userName = manager.createName(pn,GSSName.NT_USER_NAME);
GSSCredential cred = manager.createCredential(usr,
GSSCredential.DEFAULT_LIFETIME,
krb5Mechanism,
GSSCredential.INITIATE_ONLY);
GSSName peerName = manager.createName(servicename,
GSSName.NT_HOSTBASED_SERVICE, krb5Mechanism);
GSSContext setContext = manager.createContext(peerName, krb5Mechanism, cred,
GSSContext.DEFAULT_LIFETIME);
setContext.requestInteg(false);
setContext.requestConf(false);
byte[] inputBuf = new byte[0];
byte[] tkt = setContext.initSecContext(inputBuf, 0, 0);
}catch(GSSException gsse){
gsse.printStackTrace();
}

In Kerberos when requesting services, the client sends the following two messages to the TGS: A composed message of the Ticket-Granting Ticket and the ID of the requested serviceand authenticator (which is composed of the client ID and the timestamp), all encrypted using the client/TGS session key.
Then upon receiving these messages the TGS sends the followings to the client:
A: Client-to-server ticket (which includes the client ID, client network address, validity period and Client/server session key) encrypted using the service's secret key.
B: Client/server session key encrypted with the client/TGS session key.
Now I'm wondering how to obtain A and B throught the kerberos login in GSS-API . I have the following code that I use to request a kerberized service but it returns only a KerberosTicket in PrivateCredentialsSet for the Subject. A sessionKey can also be obtained form this KerberosTicket ! Which session key is this ? the session key B described above? and Where to get the Client-to-server ticket (A) described above ?
Thanks for any help !
Alex
lc = new LoginContext("login-client", new TextCallbackHandler());
lc.login();
mysubject = lc.getSubject();
java.util.Set principals = lc.getSubject().getPrincipals();
java.util.Iterator iterador = principals.iterator();
if (iterador.hasNext()){
KerberosPrincipal principal = (KerberosPrincipal) iterador.next();
clientName =principal.getName();
PrivilegedAction generateServiceTicket = new ClientAction(clientName,"[email protected]");
Subject.doAs(mysubject, generateServiceTicket);
Set prvCredentials = lc.getSubject().getPrivateCredentials();
for (Iterator i = prvCredentials.iterator(); i.hasNext(); j++) {
KerberosTicket ticket = (KerberosTicket) i.next();
prvKrbCrds = (KerberosTicket[]) mysubject.getPrivateCredentials().toArray(new KerberosTicket[0]);
public Object run() {
try{
GSSManager manager = GSSManager.getInstance();
Oid krb5Mechanism = new Oid("1.2.840.113554.1.2.2");
Oid krb5PrincipalNameType = new Oid("1.2.840.113554.1.2.2.1");
GSSName userName = manager.createName(pn,GSSName.NT_USER_NAME);
GSSCredential cred = manager.createCredential(usr,
GSSCredential.DEFAULT_LIFETIME,
krb5Mechanism,
GSSCredential.INITIATE_ONLY);
GSSName peerName = manager.createName(servicename,
GSSName.NT_HOSTBASED_SERVICE, krb5Mechanism);
GSSContext setContext = manager.createContext(peerName, krb5Mechanism, cred,
GSSContext.DEFAULT_LIFETIME);
setContext.requestInteg(false);
setContext.requestConf(false);
byte[] inputBuf = new byte[0];
byte[] tkt = setContext.initSecContext(inputBuf, 0, 0);
}catch(GSSException gsse){
gsse.printStackTrace();
}

How to get the CLIENT OS USER NAME using Apex

Dear All,
I know there are many other posts (some of them are very old) discuss about this issue. But unfortunately most of the posts endup with NO PROPER ANSWER. But still I believe that tehre has to be some way to do this. So this is my requirement.
I am using custom authentication module and I want to get the CLIENT MACHINE OS USER NAME for that. But I do not want to do any authentication against the client user domain.
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* There are some other way to get this using VB Scripts. But thats not a real solution for this due to followings
01. User has to manually allow to run VB scripts. So if user dissable that then we canot get the required info
02. Its working only with specific browsers(Mainly in IE and also we can get that thing work after installing plugins to Firefox.). So this is also depends with the bvrowser and plugings.
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Thanks,
Alex

Its good that you did some searching in the forums before you posted the question.
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Lets say you were able to pull out such information from an end user, what would be next, get his mail id from outlook ? , access his browsing history, steal credit card information or read cookies?
Add to that , what if the end user accesses it using any other OS(linux,macintosh or even a smartphone) ? what about windows vista and windows 7 OS's , are you going to write code to handle all those cases too ?
Here's a blog posting which explains using NTLM authentication with Apex(it still needs configuration from the end user)
What I want to do is to get this info using a common way which is not depends with the browser or any thirdparty plugins.I guess if this is the question, then the answer would have to be no. I don't think you will be able to find a method that passes this information from the client side without any modification/configuration at their side

Help: How to get the enddate as February28 or january 31

Hello Folks,
Am trying to get the data 2 months prior. So i was wondering how to get the enddate as 02/28/2010 or 01/31/2010.
Thanks a lot
Edited by: user11961230 on Apr 21, 2010 11:50 AM

SQL> SELECT TO_CHAR(LAST_DAY(ADD_MONTHS(SYSDATE,-2)),'DDMONTHYYYY') dates FROM DUAL;
DATES
28FEBRUARY 2010
SQL> SELECT TO_CHAR(LAST_DAY(ADD_MONTHS(SYSDATE,-2)),'MONTHYYYY') dates FROM DUAL;
DATES
FEBRUARY 2010
SQL> SELECT TO_CHAR(LAST_DAY(ADD_MONTHS(SYSDATE,-3)),'DDMONTHYYYY') dates FROM DUAL;
DATES
31JANUARY 2010
SQL> SELECT TO_CHAR(LAST_DAY(ADD_MONTHS(SYSDATE,-3)),'MONTHYYYY') dates FROM DUAL;
DATES
JANUARY 2010
SQL>

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Hi there.
I just started using the Java Studio Creator 2 and now I need to get hold of the client IP address - this should be part of the request, but I cannot fint the right way to get hold of that information. I want to be able to access this information from within the Java-code in a JSP/JSPF-page.
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request.getRemoteAddr();
This is the way I remember it from the JSP/Servlet-days...
Sincerely,
- Oystein Saebo -

javax.servlet.http.HttpServletRequest req = (javax.servlet.http.HttpServletRequest) getExternalContext().getRequest();
req.getRemoteAddr();

WebGUI: How to get the users IP-address

Hello.
I have to develop a simple web-application, that will enable users to reset their forgotten passwords or to unlock themselves, if they are locked because of too many failed login-attempts.
As you can imagine, this application must not require a login. For security reasons any action has to be logged.
The username can not be used for logging-purposes, as the application is executed using a default-user defined in transaction SICF. That's why the IP-address of the user's pc has to be written into the log-table.
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At the moment i am able to read the name of the client-pc with my test-coding.
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      EXPORTING
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That's why the experimental coding is quite useless, because the user is able to avoid it's execution.
In theory i could use experimental coding #2 and stop the execution of the program if an empty string is returned but some users in our company have administrator-privileges and so they can change environment-variables at will. So i am afraid, that this procedure is not an option.
I am quite sure, that there must be a way to read the IP-address directly from the ITS without using the functions in my experimental coding, but i have no clue how this could be done.
Any suggestions would be highly appreciated.
As i do'nt know how to determine the version of our ITS, i have to leave this information out for the moment. If anyone needs this information it would be very kind, if he or she could tell me how to get the required information.
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Regards
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Edited by: Jörg Neumann on Oct 16, 2009 1:27 PM

Hello Wolfgang.
Thanks for your reply.
I can imagine, that the application as described above seems to be very insecure, but the description is not complete - i left some parts out, as they were not relevant for my problem.
1.) The application can only be reached from our intranet.
2.) Unlocking / Resetting password can be done three times per day, which limits the number of attemps for cracking a password to a total of 20 per day.
3.) The owner of the account will receive an email if the acount was changed by the application. So if somebody tries to crack the password, the owner of the account will get a total
20 3 mails per day - which should make him/her at least a litte suspicious.
I know, that the logged data is quite worthless, as computername and username are read using clientside-scripting and there could be a proxy between the client and the server, but this is exaclty, what i have to develop.
I will keep the logging-problem in mind and talk about it in the next meeting, though i am quite sure, that it wo'nt change anything.
Regards Jörg Neumann
Edited by: Jörg Neumann on Oct 19, 2009 4:57 PM

How to get the Clinet IP address in PAR files

Hi Frndzz...
My requirement is to get the log on details of portal users, here i need the User ID n client IP address .
Am trying to get these details from masthead iview PAR file, and this details am passing to a java(custom) class which can create a log_Test.txt file with these details.
User ID am gettiing using UME API like this in masthead PAR file
public void GetWelcomeID(IPortalComponentRequest request, String welcomeClause)
IUserContext userContext = request.getUser();
String usr =userContext.getLogonUid();
But am unable to get the Client IP
In normal JSP will get the client IP like this request.getRemoteAddress()
So in par file i used the IPORTALCOMPONET request to get the client IP, i thought IPORTALCOMPONET request is equalent to HTTPSERVLETRequest request interface.
Any one suggest me that how we can get the Client IP in PAR files .
Thanks in Advance
Regards
Rajesh

Hi,
This is a very interesting question, i searched many time before to get an answer for this on sdn. I havn't found solution. As i know, It is very diffcult to find the ip address from request object.
The main reason is, before reaching the servlet class the request is by pass through other node like dispatcher/central node. If you try to fetch request objects ip from server class i think it will only return you the dispatcher server ip only.
There is a solution for this problem.. if you are able to fetch the ip using some client side scripting and pass it to the servelet as parameter, i hopes you can acheive this.
I will try this and let u know the result.
Others please share your thoughts on this topic.
Regards
Baby

How to retrieve the client IP address when Apache acts as a proxy for Tomca

Hello,
I am trying to retrieve the client IP address accessing the web
services. Because Apache is our proxy for all requests, when I try to
retrieve the client IP I always get the localhost IP: 127.0.0.1
The following code returns the localhost IP:
MessageContext msgContext = MessageContext.getCurrentContext();
if(msgContext != null) {
return msgContext.getProperty(Constants.MC_REMOTE_ADDR).toString();
return "Unknown";
From a servlet, obtaining the client IP address can be achieved using
this code.
String ipAddress = request.getHeader("x-forwarded-for");
if (ipAddress == null) {
ipAddress = request.getHeader("X_FORWARDED_FOR");
if (ipAddress == null){
ipAddress = request.getRemoteAddr();
return IPaddress ;
Any help is greatly appreciated.
Thank you very much

@ejp....
thanks buddy....
u made my world a better place to live.....

How to get the vm ip address in scvmm 2012

Hi,
I want to get the vm ip address in scvmm 2012, who can help me?

I have seen lots of people ask this because they can see IP addresses in other Virtualization Consoles, Unfortunately SCVMM doesn't show IP address of the VMs on the console but you can use below script to populate Custom1 property of VMs with IP address
and make Custom1 Column visible (manually) in SCVMM Console... HTH
param ( $VMMServer = 'localhost')
$CustomProp = Get-SCCustomProperty -Name Custom1
$VMs = get-SCVirtualMachine -VMMServer $VMMServer
foreach ($VM in $VMs)
$NetAdp = get-SCVirtualNetworkAdapter -VM $VM.name
if ($NetAdp.IPv4Addresses)
[String[]]$str = $NetAdp.IPv4Addresses
Set-SCCustomPropertyValue -CustomProperty $CustomProp -InputObject $VM -Value "$str"
Disclaimer: The sample script is provided AS IS without warranty of any kind.

How to print the client ip address at the server side( reqd for logging )??

Hello everybody...
joined this forum recently.....
In RMI programming.... is there any way by which the server can know the the Client ip address or machine name.... i want to know this bcoz i need to create a log file as to who all had connected withe the server..
need a solution soon..... thanks in advance....

@ejp....
thanks buddy....
u made my world a better place to live.....

Pls help : How to get the client ip address in EJB

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