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My goal is make a web controller to connect and manage a configuration AP, like Tanaza, Ubiquiti, or Sophos.

How do they communicate between server and my private network without port forwarding?

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    – Ron Maupin
    Aug 15 '17 at 19:10
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Cloud controlled network devices initiate the communication to the cloud. This is the same way that hosts with web browsers communicate with web servers.

If you have a privately addressed network, it uses NAT to communicate with the public Internet. NAT will maintain a table of connections from inside to outside so that any connection initiated from the inside can receive responses from the outside. Port forwarding is really just making a permanent entry in the NAT table, allowing communications to be initiated from the outside.


As a side note, you need to be very, very careful with security and cloud controlled devices. The recent IoT takeover and nefarious use of such devices in a massive DDoS attack demonstrates the problem.

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