SRW2024 - Forcing clients to use a specific IP address (based on port)
With the SRW2024 managed switch, is it possible to force a client computer connected to a port to use a specific IP address (for example 192.168.1.30) and if the client tries to configure any other address which is not 192.168.1.30, the traffic is dropped and they essentially cannot access any LAN or internet resources?
Basically what I would like to do is associate an IP address with every port on the switch. It sounds like this would be possible using the IP based access control feature, however I wanted to confirm.
Thank You
Message Edited by RedWarrior on 12-05-2008 11:49 AM
Well, I have contacted three different stores asking which hardware version they have in stock, (even providing instructions on how they can check)... Two of the three stores said they didn’t know what I was talking about and couldn’t check it for me, and the third one actually told me to contact Linksys and ask them... as if Linksys is supposed to know which hardware version their store carries!
So I guess I will have to ask once more if anyone here knows how long hardware version 1.2 (for srw2024) has been out?
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Attachments:
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At line:1 char:1
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Server: JBoss EAP 6.2.0
Client: JDK 1.7.0_51 x64
JAX-WS: RI 2.2.8 ( via -Djava.endorsed.dirs )
I am getting a java.lang.NullPointerException when calling the operation on the WS endpoint from the client when using non-anonymous replyTo address.
I have simplified the scenario into a small test case that hopefully others can replicate. Since the exception is happening on the client instead of the server, I would think that the container used is irrelevant, but I have specified it nonetheless.
1) WebService:
package test.webservice;
import java.util.Random;
import javax.jws.WebMethod;
import javax.jws.WebParam;
import javax.jws.WebService;
import javax.jws.soap.SOAPBinding;
import javax.xml.ws.soap.Addressing;
@WebService(targetNamespace="http://services.nowhere.org/")
@Addressing(required=true)
@SOAPBinding(style = SOAPBinding.Style.DOCUMENT)
public class RandomTest {
@WebMethod
public long nextRandom(@WebParam boolean forceException) throws Exception {
if( forceException ) {
throw new Exception("Some exception");
Random rand = new Random();
return rand.nextLong();
2) Generated WSDL by JBossEAP 6.2.2:
<?xml version='1.0' encoding='UTF-8'?><wsdl:definitions xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:wsp="http://www.w3.org/ns/ws-policy" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" xmlns:wsaw="http://www.w3.org/2006/05/addressing/wsdl" xmlns:wsam="http://www.w3.org/2007/05/addressing/metadata" xmlns:tns="http://webservice.test/" xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:ns1="http://schemas.xmlsoap.org/soap/http" name="RandomTestService" targetNamespace="http://webservice.test/">
<wsdl:types>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:tns="http://webservice.test/" elementFormDefault="unqualified" targetNamespace="http://webservice.test/" version="1.0">
<xs:element name="nextRandom" type="tns:nextRandom"/>
<xs:element name="nextRandomResponse" type="tns:nextRandomResponse"/>
<xs:complexType name="nextRandom">
<xs:sequence/>
</xs:complexType>
<xs:complexType name="nextRandomResponse">
<xs:sequence>
<xs:element name="return" type="xs:long"/>
</xs:sequence>
</xs:complexType>
</xs:schema>
</wsdl:types>
<wsdl:message name="nextRandom">
<wsdl:part element="tns:nextRandom" name="parameters">
</wsdl:part>
</wsdl:message>
<wsdl:message name="nextRandomResponse">
<wsdl:part element="tns:nextRandomResponse" name="parameters">
</wsdl:part>
</wsdl:message>
<wsdl:portType name="RandomTest">
<wsdl:operation name="nextRandom">
<wsdl:input message="tns:nextRandom" name="nextRandom" wsam:Action="http://webservice.test/RandomTest/nextRandomRequest" wsaw:Action="http://webservice.test/RandomTest/nextRandomRequest">
</wsdl:input>
<wsdl:output message="tns:nextRandomResponse" name="nextRandomResponse" wsam:Action="http://webservice.test/RandomTest/nextRandomResponse" wsaw:Action="http://webservice.test/RandomTest/nextRandomResponse">
</wsdl:output>
</wsdl:operation>
</wsdl:portType>
<wsdl:binding name="RandomTestServiceSoapBinding" type="tns:RandomTest">
<soap:binding style="document" transport="http://schemas.xmlsoap.org/soap/http"/>
<wsaw:UsingAddressing wsdl:required="true"/>
<wsp:PolicyReference URI="#RandomTestServiceSoapBinding_WSAM_Addressing_Policy"/>
<wsdl:operation name="nextRandom">
<soap:operation soapAction="" style="document"/>
<wsdl:input name="nextRandom">
<soap:body use="literal"/>
</wsdl:input>
<wsdl:output name="nextRandomResponse">
<soap:body use="literal"/>
</wsdl:output>
</wsdl:operation>
</wsdl:binding>
<wsdl:service name="RandomTestService">
<wsdl:port binding="tns:RandomTestServiceSoapBinding" name="RandomTestPort">
<soap:address location="http://localhost:8080/servertest/RandomTest"/>
</wsdl:port>
</wsdl:service>
<wsp:Policy xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd" wsu:Id="RandomTestServiceSoapBinding_WSAM_Addressing_Policy"><wsam:Addressing><wsp:Policy/></wsam:Addressing></wsp:Policy>
</wsdl:definitions>
3) ant build.xml to generate the client code from WSDL
<?xml version="1.0" encoding="UTF-8"?>
<project default="build" basedir="..">
<property name="jaxws.classpath" location="C://jaxws-2.2.8/jaxws-ri/lib/*.jar"/>
<taskdef name="wsimport" classname="com.sun.tools.ws.ant.WsImport">
<classpath path="${jaxws.classpath}"/>
</taskdef>
<target name="build" >
<!-- For these to work, the JAR files in tools/jaxws-ri must be included in Ant's classpath -->
<wsimport wsdl="http://localhost:8080/servertest/RandomTest?wsdl"
verbose="true"
sourcedestdir="src"
destdir="bin"
keep="true">
<xjcarg value="-enableIntrospection"/>
</wsimport>
</target>
</project>
4) Client code
4a) ClientTest.java - Actual client run from client
package test.wsclient;
import java.util.ArrayList;
import java.util.List;
import javax.xml.ws.BindingProvider;
import javax.xml.ws.Endpoint;
import javax.xml.ws.handler.Handler;
import javax.xml.ws.soap.AddressingFeature;
import org.nowhere.services.RandomTest;
import org.nowhere.services.RandomTestService;
public class ClientTest {
public static void main(String args[]) throws Exception {
ClientTest app = new ClientTest();
app.testAddressing();
public void testAddressing() throws Exception {
String REPLY_TO_ADDRESS = "http://localhost:8082/servertest/RandomCallback";
String FAULT_TO_ADDRESS = "http://localhost:8082/servertest/RandomCallbackFault";
RandomTestService service = new RandomTestService();
RandomTest port = service.getRandomTestPort(new AddressingFeature());
BindingProvider provider = (BindingProvider) port;
// pass the replyTo address to the handler
provider.getRequestContext().put("ReplyTo", REPLY_TO_ADDRESS);
provider.getRequestContext().put("FaultTo", FAULT_TO_ADDRESS);
// Register handlers to set the ReplyTo and FaultTo on the SOAP request sent to the WS endpoint
List<Handler> handlerChain = new ArrayList<Handler>();
handlerChain.add(new ClientHandler());
provider.getBinding().setHandlerChain(handlerChain);
// Start endpoint to receive callbacks from WS
Endpoint endpoint = Endpoint.publish(REPLY_TO_ADDRESS, new CallbackSEI());
try {
port.nextRandom(false);
} catch( Exception ex ) {
ex.printStackTrace();
} finally {
Thread.sleep(10000);
endpoint.stop();
System.exit(0);
4b) ClientHandler.java - Used to set the wsa ReplyTo address and FaultTo address when sending SOAP request from client to server
package test.wsclient;
import java.util.Set;
import javax.xml.namespace.QName;
import javax.xml.soap.SOAPEnvelope;
import javax.xml.soap.SOAPHeader;
import javax.xml.ws.handler.MessageContext;
import javax.xml.ws.handler.MessageContext.Scope;
import javax.xml.ws.handler.soap.SOAPHandler;
import javax.xml.ws.handler.soap.SOAPMessageContext;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
public class ClientHandler implements SOAPHandler<SOAPMessageContext> {
public ClientHandler() {};
@Override
public Set<QName> getHeaders() {
return null;
@Override
public void close(MessageContext arg0) {
@Override
public boolean handleFault(SOAPMessageContext context) {
return true;
protected void setAnAddress(SOAPHeader header, String tagName, String address) {
NodeList nodeListReplyTo = header.getElementsByTagName(tagName);
NodeList nodeListAddress = nodeListReplyTo.item(0).getChildNodes();
for (int i = 0; i < nodeListAddress.getLength(); i++) {
Node node = nodeListAddress.item(i);
if ("Address".equals(node.getLocalName())) {
node.setTextContent(address);
break;
protected String getMessageID(SOAPHeader header) {
NodeList nodeListMessageId = header.getElementsByTagName("MessageID");
return nodeListMessageId.item(0).getTextContent();
@Override
public boolean handleMessage(SOAPMessageContext context) {
Boolean isOutbound = (Boolean) context.get(SOAPMessageContext.MESSAGE_OUTBOUND_PROPERTY);
if (isOutbound) {
try {
SOAPEnvelope envelope = context.getMessage().getSOAPPart().getEnvelope();
SOAPHeader header = envelope.getHeader();
/* extract the generated MessageID */
String messageID = getMessageID(header);
context.put("MessageID", messageID);
context.setScope("MessageID", Scope.APPLICATION);
/* change ReplyTo address */
setAnAddress(header, "ReplyTo", (String) context.get("ReplyTo"));
setAnAddress(header, "FaultTo", (String) context.get("FaultTo"));
} catch (Exception ex) {
throw new RuntimeException(ex);
return true;
4c) CallbackSEI.java - endpoint on the client for server to send the SOAP response back to the client
package test.wsclient;
import javax.annotation.Resource;
import javax.jws.Oneway;
import javax.jws.WebParam;
import javax.jws.WebService;
import javax.xml.ws.Action;
import javax.xml.ws.RequestWrapper;
import javax.xml.ws.WebServiceContext;
import javax.xml.ws.soap.Addressing;
@WebService
@Addressing
//@HandlerChain(file = "/handler-chain.xml")
public class CallbackSEI {
@Resource
private WebServiceContext context;
* If there is no namespace specified in the method below, then the CallbackSEI needs to be in the same package as the
* WS endpoint.
@Oneway
@Action(input="http://services.nowhere.org/RandomTest/nextRandomResponse")
@RequestWrapper(localName="nextRandomResponse", targetNamespace="http://services.nowhere.org/")
public void handleNotification(@WebParam(name="return")long random) {
System.out.println("Asynch response received");
System.out.println( random );
//System.out.println("This response relates to the message ID: "+ getMessageID());
In summary:
Server is listening on port 8080
Client will listen in port 8082 for the callback from the server for the SOAP response
Now when I run the client, I see that the proper behaviour as far as ws-addressing is concerned. That is:
client -- SOAP request ( on port 8080 ) --> server
client <-- HTTP 202 ( empty HTTP body ) --- server
client <-- SOAP response ( on port 8082 ) --- server
All well and good, except that I am getting a NullPointerException on the client side when I call the operation.
With debugging of the SOAP request and responses, I get the following output:
---[HTTP request - http://localhost:8080/servertest/RandomTest]---
Accept: text/xml, multipart/related
Content-Type: text/xml; charset=utf-8
SOAPAction: "http://services.nowhere.org/RandomTest/nextRandomRequest"
User-Agent: JAX-WS RI 2.2.8 svn-revision#13980
<?xml version='1.0' encoding='UTF-8'?><S:Envelope xmlns:S="http://schemas.xmlsoap.org/soap/envelope/" xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"><S:Header><To xmlns="http://www.w3.org/2005/08/addressing">http://localhost:8080/servertest/RandomTest</To><Action xmlns="http://www.w3.org/2005/08/addressing">http://services.nowhere.org/RandomTest/nextRandomRequest</Action><ReplyTo xmlns="http://www.w3.org/2005/08/addressing">
<Address>http://localhost:8082/servertest/RandomCallback</Address>
</ReplyTo><FaultTo xmlns="http://www.w3.org/2005/08/addressing">
<Address>http://localhost:8082/servertest/RandomCallbackFault</Address>
</FaultTo><MessageID xmlns="http://www.w3.org/2005/08/addressing">uuid:bcd2f6ef-3034-49e8-b837-dbd6a772fb93</MessageID></S:Header><S:Body><ns2:nextRandom xmlns:ns2="http://services.nowhere.org/"><arg0>false</arg0></ns2:nextRandom></S:Body></S:Envelope>--------------------
---[HTTP response - http://localhost:8080/servertest/RandomTest - 202]---
null: HTTP/1.1 202 Accepted
Content-Length: 0
Content-Type: text/xml;charset=UTF-8
Date: Fri, 18 Jul 2014 08:34:36 GMT
Server: Apache-Coyote/1.1
java.lang.NullPointerException
at com.sun.proxy.$Proxy38.nextRandom(Unknown Source)
at test.wsclient.ClientTest.testAddressing(ClientTest.java:43)
at test.wsclient.ClientTest.main(ClientTest.java:18)
---[HTTP request]---
Cache-control: no-cache
Host: localhost:8082
Content-type: text/xml; charset=UTF-8
Content-length: 704
Connection: keep-alive
Pragma: no-cache
User-agent: Apache CXF 2.7.7.redhat-1
Accept: */*
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"><soap:Header><Action xmlns="http://www.w3.org/2005/08/addressing">http://services.nowhere.org/RandomTest/nextRandomResponse</Action><MessageID xmlns="http://www.w3.org/2005/08/addressing">urn:uuid:65d8d7fc-09e4-494a-a9c5-0a01faf4d7e6</MessageID><To xmlns="http://www.w3.org/2005/08/addressing">http://localhost:8082/servertest/RandomCallback</To><RelatesTo xmlns="http://www.w3.org/2005/08/addressing">uuid:bcd2f6ef-3034-49e8-b837-dbd6a772fb93</RelatesTo></soap:Header><soap:Body><ns2:nextRandomResponse xmlns:ns2="http://services.nowhere.org/"><return>2870062781194370669</return></ns2:nextRandomResponse></soap:Body></soap:Envelope>--------------------
Asynch response received
2870062781194370669
As you can see from the output above, the proxy is throwing an Exception when it receives the HTTP 202 response.
Any ideas ?I think I have found when I get this error and probably I have found a bug. I will appreciate if someone can confirm this.
In my BPEL project setup, my BPEL process's wsdl file imports another wsdl from different namespace. Here is sample snippet -
<wsdl:definitions targetNamespace="http://namespace/1">
<wsdl:import namespace="http://namespace/2" location="resources/another.wsdl"/>
<plnk:partnerLinkType....../>
</wsdl:definitions>
Please let me know. I checked the bundled samples with Oracle BPEL PM and did not find any similar case where process wsdl imports another wsdl.
Thank you.
Meghana -
How to handle thousands of clients without using Overlapped I/O?
Is there's a way that allows me to handle thousands of clients without using Overlapped I/O? Based on what I know select() can only handle 64 sockets, and it is not a good idea to increase this limit (by overriding FD_SETSIZE).
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I don't have a problem in using Overlapped I/O, I just wanted to know if this is the only way to go.
Well, you could create thousands of threads, one per client, and use blocking sockets. Or you could use window-message based notifications - see WSAAsyncSelect. Or, you could poll with select(), a chunk of 64 at a time, with a short timeout. All of these
would work, though none would scale very well.
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Sending a message to a specific ip address
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You can do it via various means, but not without some action on the part of the target - the ability to blindly send messages to some unsuspecting user is too easy to exploit (and has been done many times in the Windows world via 'net send'...).
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Can you force a Oracle Update Statement to use a specific database thread?
We are attempting to write a Oracle Update Statement to update a value on all records in a single column. We are updating a column with a value found in a history table. Simple enough. We do it all the time. It works but we are having contention issue with users on the system using the main database threads and updating the same table at the same time. So what is happening is the update uses up all the available database threads and then the users just get timeouts and can't update. What we are trying to determine is can I write it to force the update statement to use a specific thread on the database when it is running?
Here is the current update statement
UPDATE
TASK_DATA TSK
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This is not about "using up all available database threads" - that's nonsense.
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2. How many rows are you updating with this update on TASK_DATA?
3. How long does it take? How often do you do it? Is there no quieter time when you can do it? -
Forcing Cisco VPN client to use NAT-T
Is there a way to force the VPN client to use NAT-T when the device isn't NATed but ESP is otherwise blocked?
My VPN client connects but tries to use ESP, even though IPSec over UDP is selected, after detecting that no NAT is taking place.Thanks. Using Linux's 'vpnc' as the VPN client provides a "force-natt" option which does the trick so a little disappointed I can't do it with the Cisco client.
I also found references to a feature request #CSCdz58488 so I thought it may have been implemented in the current VPN client. -
Remote Desktop Connection Server 2012 Clients only using on DC as Logon Server.
I am using Server 2012 and have an RDC Server running on a VM. Originally I had ordered the licensed version as Essentials was provided to me which does not allow for a full domain environment, which is required for the RDC server. Anyway, I
used Eval versions to get started, not thinking or realizing that the DC would never be able to get Activated since it is an Eval. So after 4 days I have finally, loaded Server 2012 on a new VM, promoted to DC, Transferred FSMO roles...DNS is up and
replicating across both DC's. The Eval keeps shutting off and was going to demote it and remove, but whenever it is shutdown the Clients receive a "No Logon Servers are available " error. I start up the old DC and it works. I doublechecked
all of the roles have been moved, I checked the RDC gateway, everything points to the same Domain information, but when I check an account using 'CMD set' it shows the old DC as the Logon Server. Is there something I am missing in the RD Gateway or somewhere
else. Is there a way to force it to use the new DC? I have tried setting the options in remote desktop connection to use a particular TS Gateway setting and it doesnt seem to work. Can someone please help me think about this and offer a
suggestion or let me know if you need more info. I can figure nothing else out at this point.
Thanks so much in Advance.
-Tit sounds like your clients / rdc servers may still be pointing to the old DC for DNS.
Can you check you have updated DNS on the clients to talk to your new domain controller.
Regards,
Denis Cooper
MCITP EA - MCT
Help keep the forums tidy, if this has helped please mark it as an answer
The new DC is the only DNS server listed on the RDC Server and is the only DNS listed for the clients other than the gateway which have as a secondary. If I change the static on the old DC I cannot login, as soon as I put it back, I can login and it
shows that DC as the logon server.
I did a simple recursive test on both DNS servers....The new Domain Controller passes, the Old One which I am trying to remove, does not.
I will reply with any other updates as I continue to look into this and thanks for the suggestions.
So I also Pinged the domain from the RDC Server as suggested and it replies back with the old DC IP.
Not sure why.
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