UVA Proxy

To close a Firefox pop-up window using Selenium Python, you can use the close() method. Here's an example:

from selenium import webdriver

# Open Firefox and navigate to a web page
driver = webdriver.Firefox()
driver.get('https://example.com')

# Click on a link or button that opens a pop-up window
driver.find_element_by_link_text('Open Popup').click()

# Switch to the pop-up window
driver.switch_to.window(driver.window_handles[-1])

# Close the pop-up window
driver.close()

# Switch back to the main window
driver.switch_to.window(driver.window_handles[0])

This code will open Firefox, navigate to a web page, click on a link or button that opens a pop-up window, switch to the pop-up window, and then close it. After closing the pop-up window, it switches back to the main window.

In UDP, the term "connected" has a different meaning compared to TCP. Since UDP is a connectionless protocol, there is no established connection between the sender and receiver. However, you can determine if the UDP socket is in a listening state or if it has been successfully created.

To check if a UDP socket is in a listening state, you can use the socket.SOCK_DGRAM type and the bind() method. If the socket is successfully created and bound to an address and port, it will be in a listening state and ready to receive incoming UDP packets.

Here's an example using Python:

import socket

# Create a UDP socket
server_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

# Bind the socket to an address and port
server_address = ('localhost', 12345)
server_socket.bind(server_address)

# Check if the socket is in a listening state
print("Socket is in a listening state: ", server_socket.getsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR) == 1)

# Close the socket
server_socket.close()

In this example, the bind() method creates a UDP socket and binds it to the specified address and port. The getsockopt() method is used to retrieve the SO_REUSEADDR option, which indicates whether the socket is in a listening state. If the value is 1, the socket is in a listening state and ready to receive incoming UDP packets.

To change the proxy settings on an Android device, follow these steps:

1. Open the "Settings" app on your Android device.

2. Scroll down and tap on "Network & Internet" or "Connections," depending on your device's Android version and manufacturer.

3. Tap on "Wi-Fi" if you want to change the proxy settings for Wi-Fi connections, or "Mobile networks" if you want to change the proxy settings for cellular data.

4. If you're changing the settings for Wi-Fi, tap on the Wi-Fi network you're currently connected to. If you're changing the settings for mobile networks, tap on "Advanced options" or "Access Point Names (APN)."

5. Look for the "Proxy" or "Access Point" section. Tap on it to access the proxy settings.

6. You will see options to enter the proxy server's IP address and port number. Enter the required information for the proxy server you want to use. Some proxy servers may also require you to enter a username and password.

7. Once you've entered the proxy server details, save your changes by tapping on the "Save" or "Apply" button.

In Android to disable the proxy, you need to go to "Settings", then - "Connection and sharing", then - to "VPN". And then just deactivate the item. Many phones also provide for automatic disabling of proxies and VPNs when the device is rebooted. That is, if the user is difficult to understand the settings of the gadget, then you can trivially restart it through a long press the lock button (forced reboot).

The reason for the lack of connection to the network can be due to incorrect proxy settings, that is, incorrect IP addresses were entered or specified, or the server simply does not work. Users also often forget that proxy settings must be disabled.