Detecting Proxy Servers: Proxy Server Detection Programs

Teach you how to find out the fake agent

Engage in network crawler friends should understand, with the use of the agent suddenly failed the most fatal. Today we will teach you a few trickssimple and crudeThe testing method is guaranteed to make those fake agents come out of the woodwork. First of all, why do we need to test? Just like buying fresh food, you have to check the IP proxy before you can use it, right?

Four Tips for Spotting Disguises

The first move: look at the head to recognize people

The biggest difference between a proxy server and a regular connection is in the HTTP header. You can grab a packet to see it with this Python script:

import requests
proxies = {'http': 'http://ipipgo-proxy.com:8000'}
response = requests.get('http://httpbin.org/headers', proxies=proxies)
print(response.json()['headers'].get('Via', 'No proxy traces found'))

If the output displays the Via field or a specific agent identifier, the agent is in effect. This methodSimple but easy to miss, has to be coupled with other means.

Tip #2: Check the family register

Legitimate proxy service providers maintain IP libraries. ipipgo has a special feature where theirIP database updated every 6 hoursThe check up is exceptionally accurate. Use this table to compare to know whether it is true or false:

Real-world testing toolkit

Recommend three methods that have been personally tested to work well:

1. Terminal command detection:curl -x http://代理IP:端口 http://ipinfo.io/json
2. Web-based tool: ipipgo's official website for theOnline Proxy Detector(Free version is sufficient)
3. Self-built detection system: using Flask to build a simple interface, timed request verification

Frequently Asked Questions First Aid Kit

Q: What should I do if the proxy suddenly fails?
A: Eighty percent of the IP was blacked out by the target website. At this time hurry to change ipipgo's dynamic residential agent, theirIP pool updated 200,000+ per day, pro-tested for a higher survival rate.

Q: How do I choose a testing tool?
A: small projects with ready-made tools on the line, a large amount of advice to write their own scripts. Remember toMulti-dimensional detectionDon't just look at a single indicator.

Choose the right service to minimize pitfalls

Having used seven or eight proxy services, ipipgo really hits the mark in three areas:

• Responsiveness:Within 200ms on averageIt's faster than some of the big names.
• Protocol support: not only HTTP/HTTPS, even socks5 is as stable as a dog!
• Price system: pay according to the amount of not pitiful, new users send 5G traffic trial

One last bit of cold knowledge: when detecting proxiesDon't focus on one site to measure, change a few more detection endpoints. Some sites have blocked proxies themselves, making it easy to misjudge. When you encounter a situation in which the test results are jerking, change the test source before jumping to conclusions.