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# Work with proxy servers and proxy authentication

In some cases, the Web service client must go through a proxy server to reach the PPM server. In this case, a proxy server must be specified when you establish a connection. Otherwise, a connection time out error or no connection exception will occur.

There are two solutions available (depending on whether you want all or some calls to go through the proxy):

- Configure proxy by using client-axis2.xml.

- Configure proxy through java code.

## All Web Service Calls Go Through Proxy: Configure Proxy By Using client-axis2.xml

This configuration forces all Web service calls from the Web service toolkit to go through the proxy. This file locates in the following directory:
`<webservice_toolkit>/java/conf`

Add following XML configuration:

    <transportSender
    name=""
    class="org.apache.axis2.transport.http.CommonsHTTPTransportSend
    er">
         <parameter name="PROTOCOL" locked="false">HTTP/1.1</
    parameter>
    <parameter
        name="PROXY"
        proxy_host="proxy_host_name"
        proxy_port="proxy_host_port"
           locked="true>
               userName:domain:password
        </parameter>
    </transportSender>

If authentication is not available, fill

"userName:domain:password" as "anonymous:anonymous:anonymous."

## Some Web Service Calls Go Through Proxy: Configure Proxy By Using Java Code

If only a selected number of operations in the toolkit should go through the proxy, choose this solution.

Add the following method in the client code:

    public void setProxy(Stub stub, String proxyHost, int
    proxyPort) {
          // get options
          Options options = stub._getServiceClient().getOptions();
          if (options == null) {
             options = new Options();
             stub._getServiceClient().setOptions(options);
          }

          HttpTransportProperties.ProxyProperties proxyProperties = new
    HttpTransportProperties.ProxyProperties();
          proxyProperties.setProxyName(proxyHost);
          proxyProperties.setProxyPort(proxyPort);
          options.setProperty(HTTPConstants.PROXY,
    proxyProperties);
       }

Call this method before you invoke a Web service operation. For example:

    DemandServiceStub stub = new DemandServiceStub(ctx,
    serviceURL);
    setProxy(stub, "proxy.example-site.com", 8888);
    …

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