Sourcetree Proxy

There are special online services that use IP and HTTP connection tags to determine if a proxy is being used from your equipment. The most popular are Proxy Checker, Socproxy.

To check if a port is available over UDP, you can try binding to the port for a short period. If the binding is successful, the port is available. If it fails, the port is already in use. Here's a simple example in Python:

import socket

def is_port_available(port, host='127.0.0.1', timeout=2):
    with socket.socket(socket.AF_INET, socket.SOCK_DGRAM) as sock:
        try:
            sock.bind((host, port))
            sock.settimeout(timeout)
            return True
        except OSError:
            return False
        finally:
            sock.close()

if __name__ == "__main__":
    port = 12345
    if is_port_available(port):
        print(f"Port {port} is available.")
    else:
        print(f"Port {port} is not available.")

In this example, the is_port_available function creates a UDP socket and attempts to bind to the specified port and host. If the binding is successful, the function returns True, indicating that the port is available. If the binding fails, the function returns False, indicating that the port is already in use.

To put a proxy on an emulator, you need to configure the proxy settings within the emulator itself. The process may vary depending on the emulator you are using. Here, I will provide instructions for the popular Android emulators:

BlueStacks:
- Open BlueStacks and sign in with your Google account.
- Click on the "three dots" (⠇) in the top right corner of the BlueStacks window.
- Select "Settings" from the dropdown menu.
- In the Settings window, go to the "Networking" section.
- You will find the "Proxy settings" or "Network settings" option. Click on it.
- Enter the proxy server address, port, and select the proxy type (HTTP or HTTPS).
- Click "Save" to apply the changes.

Nox Player:
- Open Nox Player and sign in with your Google account.
- Click on the "gear icon" (⚙️) in the top right corner of the Nox Player window.
- Select "Settings" from the dropdown menu.
- In the Settings window, go to the "Networking" section.
- You will find the "Proxy settings" or "Network settings" option. Click on it.
- Enter the proxy server address, port, and select the proxy type (HTTP or HTTPS).
- Click "Save" to apply the changes.

Please note that the steps and options may vary depending on the specific version of the emulator you are using.

VPN allows you to hide your real IP address, as well as further encrypt your traffic. VPN is also actively used for address spoofing. For example, the user is in the Russian Federation, but by connecting through a VPN server, the site "thinks" that the user is from the United States.

The easiest way is to try to open any site or application that requires an Internet connection. If the data download goes well, then the VPN is working properly. If there is a "No connection" error, then the VPN is not working properly for some reason.