Proxy IP is a common method used by many people in the work of network crawling and data collection. After obtaining the proxy IP address, in order to screen out the valid IP address, many people will verify it, remove the IP that is too long or invalid, and retain the proxy IP that meets the needs. However, when using third-party proxy IP tools for verification, some problems are often encountered. Sometimes, some proxy IP is validated as valid in one test tool, but determined to be invalid in another test tool. What is the cause of this? Let's look at some common reasons for inaccurate proxy IP authentication:
1, verify the use of different websites
Third-party proxy IP verification tools typically provide a simple website page where the user simply enters the proxy IP and port number into the input field and clicks the verification button to begin the verification process. However, although these sites look similar, the way they verify proxy IP and the processing mechanism behind it can vary, leading to inconsistent verification results.
①The method of using agent to strengthen enterprise network security
In some cases, these proxy IP verification sites will put the proxy IP submitted by the user for normal background checks. This means that websites do more in-depth testing of proxy IP in the background, including checking its connectivity, responsiveness, whether it supports HTTPS, and so on. If the proxy IP passes the criteria in the background check, the website will identify it as a valid IP and return the verification results to the user.
However, in other cases, some proxy IP verification sites may not be able to submit forms or data submitted by users to the background for background checks. This may be because the site design does not support background checks, or because the site developer does not do deep checks to simplify the verification process. In this case, the website can only perform simple front-end verification of the proxy IP, such as checking whether the proxy IP is in the correct format and whether it can connect to the target website. Due to the lack of background detection, this verification method may not fully consider the stability and reliability of the proxy IP, which may lead to inaccurate verification results.
2. Latency and concurrency Settings
When authenticating proxy IP addresses, there are generally two Settings. One is the authentication timeout period, such as 5 seconds or 10 seconds. If validation exceeds the set timeout period, it is considered invalid. The second is the number of concurrent threads. The greater the concurrency, the faster the authentication speed, but the efficiency of the proxy IP authentication may decrease. The smaller the concurrency, the slower the validation, but the accuracy of verifying the proxy IP may increase.
3. Authorize the proxy IP address
High-quality proxy IP service providers usually adopt an authorization mechanism to manage their proxy IP resources to ensure the legitimate use of resources and prevent abuse. There are two authorization methods: binding IP whitelists and authenticating account secrets.
The first method is to implement authorization by binding IP whitelists. In this case, the proxy IP service provider asks users to provide their IP addresses, which are then whitelisted. Only the IP addresses in the whitelist are allowed to use the proxy IP service. This has the advantage of ensuring that the proxy IP is used only by authorized users and prevents unauthorized users from accessing the proxy IP resources.
The second way is to verify the account secret. Under this authorization, the proxy IP service provider assigns each user a unique account number and secret (usually an API key or password). When using the proxy IP address, a user must provide the correct account and secret for authentication. Only the authenticated user can use the proxy IP address service. This authorization mechanism can prevent unauthorized users from using proxy IP addresses, and increase the security and reliability of proxy IP addresses.
②The role and importance of IP address in web crawler
4. Stability of proxy IP
Some proxy IP addresses may be determined to be valid in one validation tool but invalid in another. This is usually the case with free agent, general agent, open agent and other types of IP. These proxy IP addresses are often unstable and may change frequently, resulting in different validation results in different test tools.
To sum up, there are various reasons for the inaccurate proxy IP authentication. Therefore, when using the proxy IP tool for verification, we need to understand its verification method, set parameters, and fully understand the authorization status and stability of the proxy IP, so as to correctly screen out the valid proxy IP that meets the needs. In the verification process, choosing reliable third-party tools and high-quality proxy IP service providers are also key to improving accuracy. Only reasonable selection and use of proxy IP can ensure the effectiveness and stability of proxy IP in network crawling and data collection.
