Error Code 521: Web Server Down Solution

The servers are on strike? What's wrong with error 521?

Recently, some old iron in the group complained, visit the site suddenly popped up a521 Error, scratching his head in a hurry. The thing is that the web server you're looking for is temporarilylie flat and do nothingThe most common reason for this is that the server is under maintenance or has a sudden failure. This time the conventional operation is to wait for the other side to repair, but if you are in a hurry to visit how to do? Here to teach people to use proxy IP to break the situation.

The wonders of proxy IPs: bypassing access

As a chestnut, a 521 error is like going to the grocery store and finding the doors closed. Proxy IPs are the equivalent ofBack door key.If you want to access the website, you can use a proxy IP in Guangzhou to access the website. For example, if the main server of the website you want to visit is down in Hangzhou, you may be able to access it normally with a proxy IP in Guangzhou.

 Python example using the ipipgo proxy
import requests

proxies = {
    'http': 'http://username:password@gateway.ipipgo.com:9020',
    'https': 'http://username:password@gateway.ipipgo.com:9020'
}

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

Four Steps to Practice: Hands-On Solutions

Tip #1: Pick the right type of node
In the ipipgo backend selectStatic long-lasting IPDon't use a dynamic one. 521 errors sometimes require multiple retries, fixed IPs are more stable.

Tip #2: Switching Locales
If the other party's server is hanging in the East China node, change to a proxy IP in the South China/North China. the survival status of servers in different geographic regions may be completely different.

Tip #3: Agreement Matching
Some 521 errors are caused by incompatible HTTP protocol versions. Try switching the protocol from HTTP/1.1 to HTTP/2 in the ipipgo console, it works.

Guide to avoiding pitfalls: common rollover sites

1. Don't set the timeout too long: It is recommended to set the time at 8-15 seconds, too long time will be easy to fail.
2. Remember to clear your cache.: Browser cached error page can cause false positives
3. Don't use free agents.Free IP availability is less than 30%, with ipipgo's paid service the success rate can be more than 98%.

Real Case: First Aid for E-Commerce Platforms

Last week there is a cross-border e-commerce brother, the customer website reported 521 error, anxious fire. With ipipgo'sUS Static IP+Switch Atlanta node, 10 minutes to restore the data crawl. Later found out that it was the other server room air conditioning leakage, the whole 8 hours to repair, fortunately there is a proxy IP top.

Frequently Asked Questions QA

Q: What should I do if I use a proxy IP or 521?
A: ① check whether the IP license has expired ② change the access port ③ contact ipipgo customer service to get a spare gateway

Q: Does proxy IP affect access speed?
A：ipipgo的BGP线路基本无感，实测比还快的情况都有，毕竟他们家有专门优化过的中转线路。

Q: Do I need to configure complex rules?
A: in ipipgo background directly copy the ready-made code snippet on the line, white users can also be three minutes to get it done. Their access to the document is written especially grounded, without those metaphysical terminology.

Don't panic when you encounter 521 errors, use a good proxy IP this magic weapon, many problems can be solved. Especially like ipipgo this service provider, nodes more coverage, the critical moment can really save lives. What do not understand, directly to their official website to find online customer service, the response speed than some e-commerce platform much faster.