"guest" user can only connect via localhost

[{rabbit, [{loopback_users, ["root"]}]}].

import pika

# Set the connection parameters to connect to rabbit-server1 on port 5672# on the / virtual host using the username "guest" and password "guest"

credentials = pika.PlainCredentials('root', 'root')

parameters = pika.ConnectionParameters('rabbit-server1',

                                       5672,

                                       '/',

                                       credentials)

import pika

# Set the connection parameters to connect to rabbit-server1 on port 5672# on the / virtual host using the username "guest" and password "guest"

parameters = pika.URLParameters('amqp://guest:guest@rabbit-server1:5672/%2F')

import pika

i = 1

def callback(ch, method, properties, body):

    global i

    #print 'receive %r'%body

    print 'receive %s'%i

    i += 1

    f = open('%s'%i, 'w+')

    f.write(body)

    f.close()

#第一种方法

#credentials = pika.PlainCredentials('mtest', 'root')

#connection = pika.BlockingConnection(pika.ConnectionParameters('rabbit-server', 5672, '/', credentials))

#第二种方法

parameters = pika.URLParameters('amqp://mtest:root@rabbit-server:5672/%2F')

connection = pika.BlockingConnection(parameters)

channel = connection.channel()

channel.queue_declare(queue='hello')

channel.basic_consume(callback, queue='hello1', no_ack=True)

channel.start_consuming()