[Boost-users] Server application won't bind to ports on IP address other than my internal ones

Subject: [Boost-users] Server application won't bind to ports on IP address other than my internal ones
From: Osman Zakir (osmanzakir90_at_[hidden])
Date: 2019-01-06 18:28:07

I have a server application that I wrote.  It currently doesn't bind to any ports on any IP address other than my computer's internal IP addresses (the localhost and 192.168.x.x ones). The application is the one whose source code is on GitHub here<https://github.com/DragonOsman/currency_converter/>.

I used the asynchronous server and client examples from the Boost.Beast GitHub repository for the networking code (this link for the server: link<https://github.com/boostorg/beast/blob/develop/example/http/server/async/http_server_async.cpp>; this link for the client: link<https://github.com/boostorg/beast/blob/develop/example/http/client/async/http_client_async.cpp>). But when I run it using my external IP address, I get the error documented on lines 471 and 472:

// Bind to the server address
acceptor_.bind(endpoint, ec);
if (ec)
{
    std::cerr << "Lines 471 and 472:\n";
    fail(ec, "bind");
    return;
}

with the error itself being:

bind: The requested address is not valid in its context

And I've heard from whoever has tried to download and then run the server application that it just closes on its own after a while. I also tried to deploy it to Heroku as a Docker container before and found that it wouldn't bind to any ports they tried to bind it to and they had to kill it with SIGKILL.

I tried to look for the code for bind in Asio, but I don't really know where to look. Some help on that would also be appreciated. I might be able to figure it from reading that code. If I can't, I'll come back here.