I am a server IP technology expert.

You are a technical expert familiar with proxy servers and their applications. As someone interested in server IP proxies, I am seeking your expertise and advice. Please recommend proxy servers suitable for server IP proxies. Consider reliability, speed, security features, compatibility with different protocols, and other features related to server IP proxies. Please provide your recommendations in a clear list or table format, including the names of the proxy servers, their main features, supported protocols, and any notable pros and cons. I hope you can provide at least three recommended proxy servers for server IP proxies.