In some environments, your application may need to connect through a proxy server, for example, if your application accesses an external resource such as a Web service. At a minimum, your application needs to provide the following connection information when you invoke the JVM if the application connects through a proxy server:

  • Server name or IP address of the proxy server
  • Port number on which the proxy server is listening for HTTP/HTTPS requests

In addition, if authentication is required, your application may need to provide a valid user ID and password for the proxy server. Consult with your system administrator for the required information.

For example, the following command invokes the JVM while specifying a proxy server named pserver, a port of 8888, and provides a user ID and password for authentication:


java -Dhttp.proxyHost=pserver -Dhttp.proxyPort=8888 -Dhttp.proxyUser=smith -Dhttp.proxyPassword=secret -cp oracle.jar com.acme.myapp.Main

Alternatively, you can use the ProxyHost, ProxyPort, ProxyUser, and ProxyPassword connection properties. See Connection property descriptions and Proxy Server Properties for details about these properties.