blocks|key|2115731|text|另一个本地网络中的PC需要可以从Internet访问，因此如果它位于防火墙后面，则需要在路由器内设置端口转发规则。该规则需要将通信量从公共IP地址转发到代理的内部LAN私有IP地址。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2115732|请记住，MQTT使用端口1883和8883+(用于SSL)。|2115733|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

The PC in the other local network needs to be accessible from Internet, so if it is behind a firewall, you need to set a port forwarding rule inside your router. The rule needs to forward the traffic from the public IP address to the internal LAN private IP address of your broker.

Remember that MQTT uses ports 1883 and 8883 (for SSL).

blocks|key|2610551|text|这都取决于您的系统需要如何工作，但您可以使用多个代理(每个网络中一个)，然后创建所谓的代理之间的桥梁。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2610552|这样做的好处是，如果出现网络中断，每个网络可以继续独立于其他网络工作。|2610553|网桥还允许您控制在站点之间共享哪些消息。有关如何创建桥的详细信息，请参见mosquitto.conf手册页：|2610554|http://mosquitto.org/man/mosquitto-conf-5.html|offset|length|2610555|但是正如Paolo所说，您需要在您的路由器上为端口1883/8883设置端口转发，以便将代理暴露在互联网上。|2610556|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|0|0|1A|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|U|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|V|8|@]|9|@$H|W|I|X|1|Y]]|A|$]]|$1|J|3|K|5|6|7|Z|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|10|8|@]|9|@]|A|$]]]|M|$N|$5|O|P|Q|A|$R|G]]]]

This all depends on how your system needs to work, but you could use multiple brokers (one in each network) then create what is known as a bridge between the brokers.
This has the benefit that the each network can continue to work independently of the others should there be a network outage.
Bridges also allow you to control which messages are shared between sites. Details of how to create a bridge are in the mosquitto.conf man page:
<a href="http://mosquitto.org/man/mosquitto-conf-5.html" rel="nofollow noreferrer">http://mosquitto.org/man/mosquitto-conf-5.html</a>
But as Paolo says, you will need to set up port forwarding for port 1883/8883 on your router to expose the the brokers to the internet.

blocks|key|2610572|text|因为mqtt使用tcp连接，所以也有一种安全的方法可以这样做：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2610573|防火墙后面的私人经纪人。另一个防火墙后面的私人代理B。C云经纪人C在互联网上。|2610574|在两个方向设置桥A到C。这必须在A上配置，到因特网的安全tcp链接将由A创建。|2610575|在两个方向设置B到C桥。这必须在B上配置。连接到互联网的安全tcp链接将由B创建。|2610576|这将创建一个更安全的桥梁，即使您没有对路由器或防火墙的控制，也可以这样做。|2610577|entityMap^0|2|4|8|3|0|0|S|3|0|U|3|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@$9|Q|A|R|B|C]|$9|S|A|T|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|U|8|@]|D|@]|E|$]]|$1|H|3|I|5|6|7|V|8|@$9|W|A|X|B|C]]|D|@]|E|$]]|$1|J|3|K|5|6|7|Y|8|@$9|Z|A|10|B|C]]|D|@]|E|$]]|$1|L|3|M|5|6|7|11|8|@]|D|@]|E|$]]|$1|N|3|-4|5|6|7|12|8|@]|D|@]|E|$]]]|O|$]]

Because <code>mqtt</code> use <code>tcp</code> connections, there is also a safe way to do this as follows:

A private broker A behind a firewall.
B private broker B behind another firewall.
C cloud broker C on the internet.

Setup the bridge A to C in both directions. This must be configured on A. The safe <code>tcp</code> link to the internet will be created by A.

Setup the bridge B to C in both directions. This must be configured on B. The safe <code>tcp</code> link to the internet will be created by B.

This will create a much safer bridge and can be done even if you do not have control over the router or firewall.

blocks|key|2610681|text|以下是允许在私有空间(home)内连接MQTT服务器的步骤|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2610682|允许您路由器上的端口转发--公共端口1883应转发到专用端口1883+IP地址以转发此端口上的请求--您的家庭/专用网络中的MQTT服务器/PC的IP地址。|ordered-list-item|2610683|更新Mosquitto配置以允许公共侦听器在#listener端口号ip地址/主机名下添加行侦听器1883+0.0.0.0这将允许来自1883端口上任何源的请求由MQTT处理|2610684|重启MQTT|2610685|经过多次尝试和许多不同配置更改的错误之后，我可以通过以下步骤成功地将MQTT服务器打开到公共/internet流量。|2610686|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$]]|$1|E|3|F|5|D|7|O|8|@]|9|@]|A|$]]|$1|G|3|H|5|D|7|P|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|Q|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|R|8|@]|9|@]|A|$]]]|L|$]]

Here are the steps to allow public connections to MQTT server within private space (home) 

<ol>
<li>allow port forwarding on your router

<blockquote>
 public port 1883 should be forwarded to private port 1883
 IP Address to forward requests on this port should be of the IP address of MQTT server/PC in your home/private network
</blockquote></li>
<li>Update Mosquitto configuration to allow public listeners

<blockquote>
 add line listener 1883 0.0.0.0 under #listener port-number [ip address/host name]
 This will allow requests from any source on 1883 port to be handled by your MQTT
</blockquote></li>
<li>Restart MQTT </li>
</ol>

I could successfully open up my MQTT server to public/internet traffic by following above steps after many trial and errors with many different configuration changes.

Currently, I'm successfully running a mosquitto broker, subscribing to topics and publishing messages with clients in a local network. 

How can I communicate with another local network which is located at a different IP address?

Should I set up 2 mosquitto brokers, one for each local network?

How to use MQTT over the internet?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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目前，我正在成功地运行一个蚊虫经纪人，订阅主题，并在本地网络中与客户发布消息。如何与位于不同IP地址的另一个本地网络通信？我是否应该设立两个蚊虫经纪人，每个当地网络一个？

问如何在互联网上使用MQTT？
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