Upstream Proxy

There are several ways to obtain a free proxy, but it's important to note that free proxies can be unreliable, slow, or even malicious. They may not provide the same level of security and privacy as paid proxies, and their performance can be unpredictable. However, if you still want to try a free proxy, here are some methods:

1. Online proxy lists: You can find lists of free proxies on various websites and forums. However, be cautious when using these proxies, as they may not be secure or reliable. Some popular websites for proxy lists include proxy-list.org and free-proxy-list.net.

2. Web proxy websites: Web proxy websites allow you to enter a URL, and the site will load the content for you using its proxy server. This can be useful for bypassing restrictions or maintaining privacy, but keep in mind that web proxies are generally slower and less secure than using a proxy on your device. Some popular web proxy websites include proxy-sites.com and hidester.com.

3. Use a free VPN service: While not a proxy, using a free VPN service can provide similar benefits, such as hiding your IP address, bypassing geographical restrictions, and improving security. Keep in mind that free VPN services may have limitations, such as data usage caps, slower speeds, or intrusive ads. Some popular free VPN services include ProtonVPN, Windscribe, and TunnelBear.

To change the proxy server on your computer, follow these steps based on your operating system:

Windows:

1. Open the Control Panel.
2. Click on "Internet Options."
3. Go to the "Connections" tab and click "LAN settings."
4. Check the "Use a proxy server for your LAN" option.
5. Enter the new proxy server address, port, and authentication details if required.
6. Click "OK" to save the changes and close all open windows.

macOS:

1. Open System Preferences.
2. Click on "Network."
3. Select your active network connection (e.g., Wi-Fi or Ethernet).
4. Click the "Advanced" button.
5. Go to the "Proxies" tab.
6. Select the appropriate proxy setting (HTTP, HTTPS, or SOCKS) from the dropdown menu.
7. Enter the new proxy server address, port, and authentication details if required.
8. Click "OK" and then "Apply" to save the changes.

To obtain an OAuth2 access token for an unknown service, you will need to follow these general steps. Keep in mind that the exact process may vary depending on the service provider and their OAuth2 implementation.

1. Identify the service provider: Determine the service provider you want to access using OAuth2. This could be a third-party application or API.

2. Check the service provider's documentation: Visit the service provider's official documentation or developer portal to find information about their OAuth2 implementation, including the authorization endpoint, token endpoint, and any required scopes or parameters.

3. Register your application: In most cases, you will need to register your application with the service provider to obtain a client ID and client secret. This is usually done through a dedicated developer portal or console. During registration, you may need to provide information about your application, such as its name, description, and redirect URIs.

4. Obtain authorization code: Direct the user to the service provider's authorization endpoint with the necessary parameters, such as the client ID, client secret, and the desired scopes. The user will be prompted to log in and grant your application access to the requested permissions. Upon successful authentication, the service provider will redirect the user to your application's redirect URI with an authorization code in the URL.

5. Exchange authorization code for an access token: Use your application's backend server to make a POST request to the service provider's token endpoint with the following parameters: client ID, client secret, authorization code, redirect URI, and (optionally) a grant type (usually "authorization_code"). The service provider will respond with an access token, which can be used to authenticate requests to their API on behalf of the user.

6. Store and use the access token: Save the access token securely in your application or cache, and use it in the Authorization header of your API requests to the service provider. Access tokens typically have an expiration time, so you may need to periodically refresh them using a refresh token or by repeating the authorization flow.

A VPN server address is an IP address or domain name through which you access the Internet. All traffic will be redirected through it. And the address is specified by the user, you can get it directly from the VPN-service, which provides such a service.

There are several options for its use: bypassing the blocking of websites, shopping in foreign online stores at regional (local) prices, access to a full library of media content, hiding your real IP-address.