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Fixing the error Client network socket disconnected before secure TLS connection was established

You are experiencing the following issue

The request I sent in Postman returns the error Client network socket disconnected before secure TLS connection was established.

Unblock yourself

Verify if the issue is related to the server

You have two options to isolate the issue and verify whether it’s on the server side, instead of Postman, the client, that runs your request.

  • Try testing a request with the Postman Echo API and verify if it works. If the request doesn’t return the error, the issue is related to the server. Reach out to the API service of the request you’re trying to send.
  • Try to replicate this request outside of Postman. Use the code generation feature to generate a cURL request and try making that cURL request from your terminal. If you can reproduce the issue, the issue is related to the server. Reach out to the API service of the request you’re trying to send.

Turn off SSL verification for the request. If the request doesn’t return the error, verify your certificate configuration.

Verify your proxy configuration

If you are using Postman behind a proxy, verify your proxy configuration.



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