I believe that many friends have used http. Whether it is due to business needs or personal needs, there will always be some problems in the process of using proxy IP, such as failure to connect and slow network speed. Let's take a look at the reasons for these problems:

1. The network speed of the server is not good.

2. Poor IP server performance. If the proxy IP is used very slowly for a long time, it may be due to server performance, which cannot bear the pressure brought by a large number of users;

3. The target site speed is unstable. The proxy IP speed is fast and the target site is slow, which also affects it;

4. There are problems with the program debugging of the user using the proxy IP;

5. Mainly observe the status code returned by http, count the error information and http status code, and count the success rate and failure rate separately to see the proportion. To analyze whether it is a problem with the website, massive customized proxies, or program software;

6. Check whether the target website has been upgraded, and it is recommended whether the crawler has been restricted.

The reasons for the slow speed of using proxy IP are basically the above. ISPKEY, which has a large number of high-anonymous IP network resources, ensures the purity and stability of IP.

In addition, some users reported that during the crawling process, they used proxy IP but still encountered request failures. What is going on? In fact, if the crawler is used improperly or a low-quality proxy IP is used, the above situation will occur. Let's take a look at the common errors and their causes when using proxy IP.

1. Error code 401 (unauthorized)

When the error code is 401, the web page will request identity authentication. This error only occurs when you need to log in to the account and password to access the web page. When we use the proxy IP browser to access, it will jump to a window with an account and password to log in. This error occurs because the authorized whitelist IP is not bound before using the proxy IP, or it may be that the fixed IP authorization is not bound, so you need to bind the authorized whitelist IP again and re-enter.

2. Error code 403 (forbidden)

This error code is the most common code encountered by crawler users. It means that the server has rejected your request. The reason for this is generally that the crawler crawls too frequently, which puts too much pressure on the target server when repeatedly accessing the page at high speed, causing the server to determine that the crawler user's IP is an abnormal access, thereby prohibiting the crawler user's IP. At this time, crawler users can only solve the problem by changing the IP address, that is, changing the IP address when it is blocked. This is why crawler users need a large number of proxy IPs. ISPKEY's sufficient IP resources are very important for crawler users. There are IP resources that can meet the needs of crawlers.

The above are some common errors when using proxy IPs. Don't panic when you encounter this situation in the future, and take corresponding measures to solve it.