How do I access TCP port internally?

I have a service using ZeroMQ that binds to 0.0.0.0:51124 that acts as a publisher with the following private networking address: endearing-strength.railway.internal Then I enabled TCP proxy for this service, which generated this address: monorail.proxy.rlwy.net:56845 Now, on the other hand, I have another service that acts as a subscriber. How do I connect using private network to this service from my other service? I tried using private network address with the TCP proxy but it doesn't seem to work, like so: endearing-strength.railway.internal:56845 I can only seem to connect using public networking address, but not with private networking.

Solution:

The public TCP proxy has nothing to do with accessing the service internally, it's a private network, so you use the port it binds to internally, in your case that's 51124 it also needs to bind to the ipv6 host :: not the ipv4 host 0.0.0.0 since it's an ipv6 only network...

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