Ensuring the proxy doesn't interfere with other web services.

Install the extension from the Chrome Web Store or Firefox Add-ons. Create a new profile. Select the protocol (HTTP or SOCKS5). Enter the Server IP and set the Port to . Apply changes and switch to that profile. Troubleshooting Common Issues

Under "Manual proxy setup," toggle to On .

If you want to create your own proxy server listening on port 12345, is the most robust choice for Linux. Install Squid: sudo apt update sudo apt install squid Use code with caution. Configure the Port: Open the configuration file: sudo nano /etc/squid/squid.conf Use code with caution. Find the line http_port 3128 and change it to: http_port 12345 Use code with caution. Restart the Service: sudo systemctl restart squid Use code with caution. 2. Configuring the Client (Windows)

Certain software packages default to this port for internal tunneling. How to Install and Configure Proxy 12345