When Crawlers Hit Anti-Crawlers How do proxy IPs save the day?
Crawlers understand that hard-written scripts are suddenly403, 429 warningsThe sky is full of flying. At this time do not rush to smash the keyboard, you may be missing just a reliable proxy IP pool. Just like guerrilla warfare must often change positions, distributed crawlers must also learn to "shoot a shot for a new IP".
Recently helped a friend to tune their company's crawler system, found an interesting phenomenon: with a single machine crawling the survival time of an average of 3 hours, changed to a distributed architecture, but half an hour on the hang. Take apart and realize that, although more machines, but all nodes are using the same export IP - this is not the same as holding up a loud speaker to tell the site "I'm crawling you"?
True distribution has to do all three:
- Physical isolation of nodes (servers in different regions)
- Network identity segregation (different IP addresses)
- Segregation of behavioral characteristics (different request fingerprints)
Proxy IP Selection Guide to Avoid Pitfalls
There are three types of agents on the market, and I've made a comparison table:
| typology | specificities | Applicable Scenarios |
|---|---|---|
| Transparent Agent | The website can see the real IP | Suitable for internal monitoring |
| Anonymous agent | Hiding real IPs but exposing proxy features | General Data Acquisition |
| High Stash Agents | Fully simulates real browser features | Countering Strict Anti-Crawl |
Our team now mainly uses ipipgo's high stash of proxies, especially theirResidential AgentsThe service. As an example, when climbing the price of an e-commerce platform, the survival rate of the data center IP is only 23%, and the residential IP directly soared to 89%. The difference is like the difference between a visitor account and a VIP account.
Four Steps to Distributed Architecture Design
1. Dynamic management of IP pools: It is recommended to prepare 3 times the amount of IP of the crawler node. For example, 10 nodes should have at least 30 IPs. ipipgo's API can get the list of available IPs in real time.
2. Intelligent Routing PolicyDon't be silly and rotate them in order, they have to be dynamically assigned in conjunction with the response speed of the target site. Our self-developed scheduling algorithm will automatically demote slow responding IPs!
3. Fingerprint Confusion System
: It's not enough to just change the IP, you also have to change the User-Agent and adjust the request interval. There's a trick - use the fingerprints of different browser versions, with ipipgo's terminal environment simulation function. 4. abnormal melting mechanismThe background of ipipgo can automatically kick such IPs out of the available queue, which is 8 times faster than manual processing. Q: What should I do if the proxy IP speed is fast or slow? Q: How do I judge the quality of the agent? Q: How to solve the problem of CAPTCHA bombing? Seen too many teams in the proxy IP planted on the heel: a cheap to buy shared IP pool results in the total loss of the army, have their own proxy server instead of being traced back to the complaint. In fact, professional things should be handed over to professional people to do, like ipipgo this kind of provideFull protocol support + automatic replacement + quality monitoringThe one-stop-shop is at least 40% less costly than self-development. Finally, a word of advice: distributed crawlers are not just a bunch of machines, the core is the"Truly distributed" thinking. Just like the war should be coordinated by air, land and sea, the crawlers also have to let the IP, equipment and behavior of the three dimensions of the real decentralized. Use a good proxy IP this "invisibility cloak", in order to be in this war of attack and defense in the last laugh.Practical QA Selection
A: Check three points: 1. whether mixed with different regional IP 2. whether the package bandwidth is over the limit 3. the proxy agreement is not the right choice. We recommend trying ipipgo's intelligent routing function, which can automatically select the optimal route!
A: Our team's testing metrics:
- Connectivity >98%
- Average delay <800ms
- Survival time >15 minutes in continuous use
ipipgo has a real-time quality dashboard in the background, which saves you the trouble of building your own inspection system.
A: The three-step first aid method:
1. Immediate switching of IP types (e.g., residential cutover from data center)
2. Reducing the current node crawl frequency
3. Enabling headless browser rendering
Combined with ipipgo's CAPTCHA Alert feature, it can pre-empt risks up to 15 minutes in advanceTell the truth.
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