Common dynamic proxy IP address types include short-acting proxy and tunnel proxy. When a user uses a proxy IP address, all the interactive data passes through the proxy server first, and the user uses the identity of the proxy service provider to access other networks. On the other hand, dynamic proxy means that the proxy IP that accesses the target server is constantly changing to increase the stealth and security of the proxy. Let's take a closer look at the two common types of dynamic proxy IP:

1, short-acting proxy: short-acting proxy is a type of proxy IP, it is characterized by the survival of each proxy IP is very short, usually only 1-2 minutes, 3 minutes, 5 minutes, 10 minutes, etc. This type of proxy IP address applies to the service scenario that requires a large number of proxy IP addresses but has a short duration. In such a scenario, the short-acting proxy IP can efficiently obtain the required data, thereby improving work efficiency.

Short-lived proxy IP providers generally maintain an IP library that contains a large number of proxy IP addresses, each with a preset lifetime. When users purchase short-acting proxy IP services, they can choose the appropriate survival time according to their needs, ranging from 1 minute to a few minutes. Users can choose a short lifetime based on their own service requirements to ensure that the proxy IP address is changed frequently, so as to maintain high anonymity and security.

In terms of measurement, short-acting proxy IP can usually be divided into two types: purchase by volume and purchase by time. Buying by volume means that users can buy a certain number of proxy IP, and then renew or purchase new IP after use. This approach is suitable for temporary, non-fixed frequency agent needs. By time, users can purchase proxy IP services for a period of time, such as an hour, a day, or a week. This approach is suitable for long-term, continuous agent needs.

2, Tunnel proxy: Tunnel proxy is a proxy IP type, mainly divided into two types: dynamic short-effect and dynamic forwarding. The characteristic of this proxy IP is that the proxy IP that accesses the target server is constantly changing, thus increasing the anonymity and security of the crawler work to a certain extent. The flexibility and applicability of tunnel agents make them an important choice for crawlers to deal with the anti-crawler strategy of websites.

①How to ensure that the crawler runs efficiently

Dynamic short-acting tunnel proxy is one of these types, and the duration of each IP proxy is generally 1 to 5 minutes, which may vary by service provider. When a dynamic short-acting tunnel proxy is used, the tunnel automatically switches to another IP proxy when the time of one IP proxy expires, thus realizing the constant change of proxy IP addresses. This approach is suitable for situations where proxy IP needs to be changed frequently, especially in response to a website's anti-crawling strategy. With dynamic short-acting tunnel proxies, crawlers can maintain a high level of anonymity and reduce the risk of being blocked from websites. Such dynamic switching allows crawlers to hide their real identity to a certain extent, improving the success rate and sustainability of crawler work.

Another type is the dynamic forwarding tunnel proxy, which does not need to switch proxy IP, each request will use a random IP proxy. This method allows concurrent requests, usually 5 requests per second by default. The dynamic forwarding tunnel proxy is applicable to scenarios that require high concurrent requests, such as high-frequency data collection tasks or large-scale website visits. Through dynamic forwarding, the crawler can carry out data collection and website visit more efficiently, improving the efficiency of work and the speed of data acquisition.

②Methods and techniques to ensure efficient and stable crawler data acquisition

In general, common types of dynamic proxy IP include short-acting proxy and tunnel proxy. Short-acting proxy is applicable to scenarios where a large number of proxy IP addresses are required but the proxy time is short. The tunnel proxy uses dynamic short-acting and dynamic forwarding to meet the proxy requirements of different users and provide more flexible and efficient proxy services. For crawlers and network data acquisition tasks, choosing the right dynamic proxy IP type can improve the efficiency and success rate of crawlers, while reducing the risk of being blocked from websites.