Socket (HTTP) connection over Proxy

:heavy_exclamation_mark: This post is older than a year. Consider some information might not be accurate anymore. :heavy_exclamation_mark:

If you need to check that a remote host has a socket open, check following example. This example creates a socket at the HTTP port over your custom network proxy. If the proxy requires authentication, you may override the default Authenticator. Keep in mind that it is only an example!

public void testSocketConnection() throws Exception {
	SocketAddress addr = new InetSocketAddress("proxy.cinhtau.net", 8080);
	Proxy proxy = new Proxy(Proxy.Type.HTTP, addr);
	Socket socket = new Socket(proxy);

	// if you have a proxy user
	Authenticator.setDefault(new Authenticator() {
		protected PasswordAuthentication getPasswordAuthentication() {
			return new PasswordAuthentication("esmeralda", "secret".toCharArray());

	InetSocketAddress dest = new InetSocketAddress("cinhtau.net", 80);
	try {
	} catch (IOException e) {
		LOGGER.error("Network error", e);
	} finally {

Read more → Java Networking and Proxies

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