proxy servers

1.Transparent agency As a proxy server, transparent proxy is characterized by not modifying the client's request, including the IP address information in the request header. This means that the target server can clearly see the original IP address and request source. Transparent proxy is usually used to monitor network traffic and prevent unauthorized access. Application scenario: Transparent proxy is often used in enterprise networks to monitor employees' online behavior and ensure network security.  Advantages and disadvantages: The advantages are easy to set up and manage, but the disadvantages are lack of anonymity, and the IP address of users is easy to be identified. 2. Anonymous proxy Anonymous proxy adds anonymity on the basis of transparent proxy, which can hide the IP address of the user, but the target server can still recognize that the request is sent through the proxy server. This type of proxy provides a degree of privacy protection.  Application scenario: Anonymous proxy is suitable for scenarios where IP addresses need to be hidden to protect users' privacy, such as online browsing or accessing some restricted resources.  Advantages and disadvantages: the advantage is that it provides basic anonymity, but the disadvantage is that the target server still knows that the request is sent through the proxy and cannot be completely anonymous. 3. High-secret agent A stealth proxy is the type that provides the highest level of anonymity among proxy servers. It not only hides the user's real IP address, but also does not disclose any proxy server information to the target server, so that the target server cannot detect that the request is sent through the proxy. Application scenario: High-profile proxy is suitable for scenarios that require high anonymity, such as journalists' investigation, political activists and any situation that requires strict protection of user privacy.  Advantages and disadvantages: The advantage is that it provides high anonymity, and the real identity and IP address of users are well protected. The disadvantage is that some access speed may be sacrificed because the proxy server needs to do more data processing.