Dynamic proxy IP authentication is valid but cannot be used normally

Before using proxy IP addresses, many users habitually prefer to perform a verification to delete invalid proxy IP addresses with long delays and retain valid proxy IP addresses with short delays. However, when used after validation, users often encounter the problem that some dynamic proxy IP validations are clearly valid, but they are marked as invalid when actually used. This can be caused by:

1, verify the URL is different:

Third-party authentication tools usually set up a simple web page for proxy IP authentication, but different authentication tools may set up different urls for authentication. This leads to situations where proxy IP validates on some websites, but may not be able to access other target websites properly when actually used.


There are several reasons for this situation:

Different website anti-crawling policies: Different websites have different anti-crawling policies and may treat proxy IP in different ways. Some websites may block or restrict proxy IP, resulting in proxy IP not being used properly on these websites. Other websites may not have strict restrictions on proxy IP, so that proxy IP can be accessed normally on these websites.

IP blocking situations: Because proxy IP addresses are shared by multiple users, some of them may be blocked by the target site due to abuse or other reasons. When using these blocked IP authentication passed, although the verification appears to be effective, but in actual use, these IP still cannot normally access the blocked website.

What causes HTTP to be slow?

The response speed of the target website: The response speed of different websites may vary. When the validation URL set by the validation tool is located on a responsive website, the proxy IP may be able to pass the validation without a problem. However, in actual use, if the response speed of the target website is slow, the proxy IP may not be used properly due to connection timeout or request failure.

In order to solve the problem that dynamic proxy IP authentication is effective but cannot be used normally, users should consider the authentication method of the authentication tool and the characteristics of the target website, and choose a proxy IP service provider with stable performance. At the same time, periodically checking the availability and performance of proxy IP addresses, and timely updating or replacing unavailable proxy IP addresses are also key measures to ensure the success rate and validity of proxy IP addresses. When using the proxy IP address, users should also choose the appropriate proxy IP address according to the specific service requirements, and avoid abusing the proxy IP address to ensure the normal use of the proxy IP address on different websites.

2. Concurrency and delay:

To prevent accounts from being associated with the authentication proxy IP address list, the authentication tool usually sets the authentication timeout period and limits the number of concurrent threads. As a result, the authentication efficiency and success rate of the proxy IP address are affected.

First, the validation tool sets a validation timeout, usually a few seconds, such as 5 seconds. After the authentication request is sent to the proxy IP address, the authentication tool waits for the response from the proxy IP address within the specified timeout period. If the proxy IP does not respond within a specified period of time, the proxy IP is considered invalid. This setting is mainly to avoid the long wait in the verification process and improve the efficiency of verification. However, sometimes the response speed of the proxy IP may be affected by factors such as the network environment, and occasional time-outs may occur during the verification process. As a result, some proxy IP addresses that are supposed to be valid are misjudged to be invalid during verification, and thus cannot work properly in actual use.

What is the impact of frequent server IP address changes on the website?

Second, validation tools also limit the number of concurrent threads. Concurrent threads refer to the number of authentication requests being made simultaneously. A larger number of concurrency speeds up validation because more requests can be executed in parallel at the same time. However, a high number of concurrent requests may burden the server of the proxy IP, causing the proxy IP to respond slowly or even fail. On the contrary, a smaller number of concurrency can improve the efficiency of validating the proxy IP, but the validation speed will be correspondingly slower. Therefore, in the process of authentication, it is very important to set the number of concurrent threads reasonably to ensure the success rate and effectiveness of proxy IP authentication.

3. Proxy IP authorization:

Good proxy IP services usually require authorization. First, bind the IP whitelist, and then verify the account secret. If something goes wrong during the authorization process, such as incorrect authorization, the IP will not work properly and will therefore be marked as invalid.

In order to solve the problem that dynamic proxy IP authentication is effective but cannot be used normally, users should comprehensively consider the characteristics of proxy IP authentication tools and choose them according to their own needs. In addition, understand the authorization rules of the proxy IP service provider to ensure the correct authorization process, so as not to affect the validity of the proxy IP address. In addition, you are advised to periodically check the availability and performance of proxy IP addresses, and update or replace unavailable proxy IP addresses in a timely manner to ensure stable availability of proxy IP addresses and improve the success rate and effectiveness of proxy IP addresses.

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