[SOLVED] Only some people are able to connect to my AWS server

Issue

I experience the following situation:

Having an HTTP server written in Go using Gin framework and hosted on AWS, only some people (approximately 20%) are able to connect (everyone is connecting from a React Native axios client using an Android device).

The server is located on ec2-3-131-85-255.us-east-2.compute.amazonaws.com:2302. Every request is POST. For example, to register, users access the /register endpoint, http://ec2-3-131-85-255.us-east-2.compute.amazonaws.com:2302/register.

Any hint would be helpful. Thank you in advance.

Solution

Most of Android devices doesn't accept http protocol by default so you have to add https

and add this in your manifest application tag

android:networkSecurityConfig="@xml/network_security_config

and add this file to your android

res/xml/network_security_config 

and write this inside this file

<?xml version="1.0" encoding="utf-8"?>
<network-security-config>
     <domain-config cleartextTrafficPermitted="true">
        <domain includeSubdomains="true">Your URL</domain>
</domain-config>
<base-config cleartextTrafficPermitted="false"/>

</network-security-config>

Answered By - Ahmed Jamal