How to connect to remote RabbitMQ Server behind a corporation proxy, in Java Code

[Wang Guohua]

Dear all,

We are using proxy to connect to internet.

I can connect to URL by set proxy properties.

System.getProperties().setProperty("http.proxyHost", "proxy.houston.hp.com");

System.getProperties().setProperty("http.proxyPort", "8080");

URL url = new URL(urlString);

InputStream content = (InputStream) url.getContent();

And, my ssh connect to internet server with proxy is good.

But, my rabbitmq connection to internet RabbitMQ server failed with connection timeout:

System.getProperties().setProperty("http.proxyHost", "proxy.houston.hp.com");

System.getProperties().setProperty("http.proxyPort", "8080");

ConnectionFactory factory = new ConnectionFactory();

factory.setHost("ec2-52-10-172-31.us-west-2.compute.amazonaws.com");

factory.setUsername("xxxx");

factory.setPassword("xxxx");

connection = factory.newConnection();

Any help?

Thanks

Andy.

[Michael Klishin]

 On 17 July 2015 at 11:10:39, Wang Guohua (sunny...@gmail.com) wrote:
> But, my rabbitmq connection to internet RabbitMQ server failed
> with connection timeout:
> System.getProperties().setProperty("http.proxyHost",
> "proxy.houston.hp.com");
> System.getProperties().setProperty("http.proxyPort",
> "8080");
>
> ConnectionFactory factory = new ConnectionFactory();
> factory.setHost("ec2-52-10-172-31.us-west-2.compute.amazonaws.com");
> factory.setUsername("xxxx");
> factory.setPassword("xxxx");
>
> connection = factory.newConnection();
>
> Any help?

RabbitMQ clients do not use HTTP. They use a different protocol which is TCP-based.
So you are looking for a TCP proxy (SOCKS, HTTP CONNECT-based, etc).

JDK has a documentation page about that:
http://docs.oracle.com/javase/7/docs/technotes/guides/net/proxies.html
--
MK

Staff Software Engineer, Pivotal/RabbitMQ

[Charles Conrad]

I am having a similar problem that I have to get through a proxy to reach my rabbit server on the cloud. After creating the Proxy object, how do I use it for creating a connection via a ConnectionFactory?

When trying to reach a webpage, you can use a URL object with the proxy. As described in the docs you linked.

SocketAddress addr = new InetSocketAddress("socks.example.com", 1080);
Proxy proxy = new Proxy(Proxy.Type.SOCKS, addr);
URL url = new URL("ftp://ftp.gnu.org/README");
URLConnection conn = url.openConnection(proxy);

How do I use this proxy with the rabbit api?

Thanks.

[Michael Klishin]

RabbitMQ Java client doesn't provide any special support for SOCKS proxies. You should

be able to use any proxy that supports arbitrary TCP traffic.

See "SOCKS" on https://docs.oracle.com/javase/8/docs/technotes/guides/net/proxies.html.

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[Ashok Jothikrishnan]

Can someone please help? I tried setting socks proxy host and port, but rabbitmq doesn't take them at all.

System.getProperties().setProperty("sockProxyHost", "xx.xx.xx.xx" );

System.getProperties().setProperty("sockProxyPort", "3128" );

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[Michael Klishin]

From earlier in this thread:

> RabbitMQ Java client doesn't provide any special support for SOCKS proxies. You should

> be able to use any proxy that supports arbitrary TCP traffic.

>

> See "SOCKS" on https://docs.oracle.com/javase/8/docs/technotes/guides/net/proxies.html

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[Ashok Jothikrishnan]

I tried all this. It doesn't connect to RabbitMQ. If I get the firewall opened, it works fine.

System.getProperties().setProperty( "java.net.useSystemProxies", "true" );

System.getProperties().setProperty("http.proxyHost", "XX.XX.XX.XX" );

System.getProperties().setProperty("http.proxyPort", "3128" );

System.getProperties().setProperty("proxyHost", "XX.XX.XX.XX" );

System.getProperties().setProperty("proxyPort", "3128" );

// System.getProperties().setProperty( "java.net.useSystemProxies", "true" );

System.getProperties().setProperty("sockProxyHost", "XX.XX.XX.XX" );

System.getProperties().setProperty("sockProxyPort", "3128" );

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[Ashok Jothikrishnan]

I also tried to socket configurator and configured it. Still I could not.

public class SocketProxyConfigurator extends DefaultSocketConfigurator {

private static final Logger log = LoggerFactory.getLogger(SocketProxyConfigurator.class);

public SocketProxyConfigurator() {

SocketAddress sa = InetSocketAddress.createUnresolved("XX.XX.XX.XX", 3128);

Proxy proxy = new Proxy(Proxy.Type.SOCKS, sa);

try {

Socket socket = new Socket(proxy);

super.configure(socket);

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

[Ashok Jothikrishnan]

All, it finally worked. There was no big magic. We setup proxyHost, proxyPort, socksProxyHost and socksProxyPort. That's it. It worked.

[Michael Klishin]

Thank you for reporting back to the list, even though multiple questions in the same thread is usually frowned upon on this list.

RabbitMQ client libraries need to be able to resolve hostnames and TCP connectivity to the target host(s), so if a SOCKS proxy configuration provides those things, there really isn't much else to configure.

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[Baljeet Kumar]

HI @Ashok - if possible can you please share a snap shot on what you changed on java code to make it work.. we are struggling on same for quite some time and no luck so far.