Proxy IP network capture principle: network capture proxy principle analysis

How do proxy IPs work? First understand this layer of windowpaper

The guys using proxy IP is like looking for a stuntman to shoot a movie, the real identity is hidden tightly. For example, if your local IP is your house number, using a proxy IP is equivalent to sending a courier to the old king's house next door. What the server sees is the address of Wang's house, and it doesn't know where you really live. This trick in the data collection, batch operation of these need to "stealth" scenario is particularly useful.

There's a key point here calledRequest forwarding. It's like if you want to go to the supermarket to buy soy sauce, you don't show up yourself, let the errand boy do it for you. Proxy server is the errand boy, to help you send the request to the target site, and then the response content piggyback. The whole process of your real IP is like wearing a cloak of invisibility, the site can only see the proxy IP address.

Three major stumbling blocks in the real world

1. IP blocked into a sieve: The target site found that the same IP frequent visits, direct blackout is not negotiable. At this time you have to learn the Monkey King pulling hairs, turn out more than one IP rotation.

2. Turtle speed loading in a hurry: Some proxy servers have bandwidth as small as a straw, especially free proxies, which are slower to use than a snail's crawl.

3. CAPTCHA chain of eventsThe site found abnormal traffic, not moving, popping CAPTCHA, ordinary proxy simply can not carry this defense mechanism.

import requests

proxies = {
    'http': 'http://user:pass@gateway.ipipgo.net:9020',
    'https': 'http://user:pass@gateway.ipipgo.net:9020'
}

response = requests.get('https://目标网站.com', proxies=proxies, timeout=10)
print(response.text)

Choose the right tool for the job

There are three main schools of thought for common agents on the market:

And here's the kicker.Static residential IP for ipipgoThe company's IPs are all tied to real home broadband, and the camouflage is pulled right up to full capacity. Their TK line is a black technology, specializing in dealing with the difficult CAPTCHA system, people who have used it understand.

Guide to avoiding pitfalls by taking shortcuts

Don't go overboard with the frequency request.: Even if you use a proxy, don't send requests like a pile driver, it's better to set a random delay of 3-5 seconds.

The IP pool should be deep enough: It is recommended to keep 500+ quality IPs on hand at the same time. ipipgo's dynamic residential packages can change tens of thousands of IPs per day, which is perfectly adequate.

Request headers should be realisticRemember to switch User-Agents randomly so that the site doesn't realize that all requests are coming from the same "bot".

QA time to clear up doubts

Q: Why do I still get blocked after using a proxy?
A: Eighty percent of the IP quality is not good, or the request characteristics are too obvious. Change ipipgo's exclusive static IP to try, and then with the request header randomization.

Q: What package should I choose for my enterprise level project?
A: directly on the ipipgo dynamic residential enterprise version, more than 9 yuan 1G flow also with request priority, batch operation is as stable as the old dog.

Q: What if I need to manage multiple accounts at the same time?
A: Use theirIP+Port BindingFunction, each account is fixed to go to a specific exit IP, perfect solution to the correlation problem.

When it comes to choosing an agent service is like looking for an object, the light cheap useless, the key must be reliable. ipipgo this brand in the industry for five or six years, a variety of difficult solutions are readily available. Especially their customized services, the last time I saw a cross-border e-commerce customers, directly to the whole of a multi-country IP automatic switching program, the effect of the bar.