Online proxy IP is a useful tool for hiding a user's true identity and preventing third-party tracking or attacks. However, it may have speed and security issues. Free proxy IPs are risky as they may have security loopholes or be slow, while shared online proxy IPs may also be expired or get stuck. Using a paid proxy IP service is recommended for ensuring information security, stability, and speed. Despite these limitations, online proxy IPs are widely used as major domestic network broadband operators and popular operating systems support PPTP or L2TP protocols, which are compatible with IP proxy settings.