RabbitMQ, trouble getting hello world example to work on anything but localhost

RabbitMQ -- http://www.rabbitmq.com/configure.html

See the frame_max. Seems like 128KB is supported by default. You may want to check that setting in your installation.

Make sure rabbitmq is actually listening on port 5672 and that the port is open in your Linode server's firewall.

In your config, RABBITMQ_NODE_IP_ADDRESS should be blank, RABBITMQ_NODE_PORT should be 5672.