How to Avoid IP Blocking: 10 Essential Tips for Crawler Engineers

Don't let IP blocking get in the way! Hands-on with Proxy IPs to keep you safe!

Brothers engaged in crawling understand, hard work to write scripts running suddenly 404, blood pressure instantly soared there? Today, not the whole false, directly on the hard core solutions. I've been in this line for five or six years, with the blood and tears lessons summarized in this set ofGuide to Staying AliveThe focus is to teach you how to defuse a blocking crisis with a proxy IP.

I. Don't put your eggs in one basket.

Single IP hard carry is definitely a death act! I've seen too many people running data with their own broadband, and as a result, the entire company network is blacked out. Using a proxy IP pool is like playingSichuan opera changing faces (idiom); fig. a dramatic change of attitudeIf you want to change the "face" of each request, we recommend using ipipgo's Dynamic Residential Proxy, which has a deep IP pool, and I've tested it for 48 consecutive hours with no repeat requests.

Secondly, the rhythm of the request should be able to "play Tai Chi".

Don't ever send out wild requests like a rash! Here's one.The Golden Formula: base interval 3 seconds + random float 2 seconds. For example, with Python's time.sleep(random.uniform(3,5)), this is not too slow and can fool the anti-climbing mechanism. ipipgo's intelligent scheduling system can automatically match the optimal request frequency, pro-measurement of the blocking rate straight down 70%.

Third, the browser fingerprints to be able to "disguise"

Now the website have become fine, will recognize the browser "identity card". Teach you a tawdry operation: use fake_useragent library to randomly generate UA, coupled with ipipgo's residential agent, so that the site thinks that each visit is a different neighborhood computer. Remember to randomize the following parameters:

- Screen resolution (don't always use 1920×1080)
- Time zone settings (try Asia/Shanghai and Asia/Tokoyo interchangeably)
- Font listings (don't let the site see the cracks)

Fourth, the head of the agreement will be "blindfolded"

Ever seen someone get caught running around naked with the requests library? Focus on checking those headers:
Accept-EncodingDon't write gzip.
ConnectionRemember to keep-alive
RefererTo fake it sensibly (don't jump from Taobao to Jingdong)

Fifth, do not meet the verification code hard just

When a human verification appears, it means that your disguise has been detected! This is the time to immediately:
1. Replacement of proxy IPs (ipipgo's API can do it in seconds)
2. Empty cookies
3. Reducing the frequency of requests
4. Coding platforms if available (but the cost goes up)

Sixth, the quality of the agent to be able to "pick the watermelon"

Remember these three tips for choosing a proxy IP:
responsiveness＞Don't use it if it's >200ms.
Degree of anonymityMust go with high stash (recommend ipipgo's residential agent)
geographic locationBe close to the target server (don't use US IPs to crawl domestic sites)

Seven, the log monitoring to "stay back"

It is recommended that these indicators be checked daily:
- Duration of single IP use (not to exceed 1 hour)
- Success rate below 85% Immediately change IP pools
- Proportion of abnormal status codes (especially 403/429)
If you use ipipgo, they have a real-time monitoring watchdog in the background, and problems will be alerted by WeChat, a feature that has saved me many times.

Eight, retry mechanism to "can play dead"

Don't have a head iron when it comes to bans! Set up a three-level retry policy:
1. First failure: wait 10 seconds and retry with a new IP.
2. Secondary failure: wait 5 minutes to change city node
3. Three failures: direct abandonment and logging

IX. Types of agreements are "in the eye of the beholder"

Don't just use the HTTP protocol! Be flexible to switch between different scenarios:
- Ordinary websites: HTTP/S is adequate
- Data on mobile: always use 4G/5G mobile agents
- Highly secure site: on SOCKS5 protocol (supported by ipipgo's enterprise version)

X. Regular updates to "change the armor"

Even if you are using a good proxy IP, you will have to change a batch of new IPs every quarter. some websites will keep a small book and settle accounts after a while. ipipgo automatically updates the IP pool of 20% every week, which is a very thoughtful design and saves you from having to manually toss it around.

Practical QA Triple Strike

Q: What should I do if I use a proxy IP and it becomes slow?
A: 80% of the IP is limited, hurry to use ipipgo speed interface to screen quality nodes, they have a smart routing function will automatically cut to the fastest line.

Q: What should I do if I encounter a website that I must log in to?
A: Remember the mnemonic:One account, one IP! Use ipipgo's Fixed Session Proxy to bind the account to the IP to avoid anomalies in the login place triggering windfall control.

Q: How to determine the proxy IP real anonymity?
A: Visit https://ipipgo.com/check this page, if the display is not your real IP and the X-Forwarded-For field is empty, it's a true high stash.

Lastly, I would like to say that choosing the right proxy service provider can really save you a lot of detours. Like ipipgo can customize the export protocol, support on-demand switching of city operators, but also with intelligent wind control services, use it than self-built agent pool really save heart. After all, we engage in technology, time is the most expensive cost is not?