Proxy IP Setting cURL Host Header: cURL Proxy IP Setting Host Header

First, why does the Host header make cURL listen?

When we're working on web requests, we often encounter situations where the server is dead set in its ways - it just recognizes that thespecific domain namebefore opening the door. For example, if you visit a website with local 127.0.0.1, the server may just throw you an error. Setting the Host header in the cURL is like slipping the doorman a fake business card that says "I'm a VIP" to make the server think the request is coming from a legitimate channel.

Second, the proxy IP and Host header is the golden partner

It's not enough to just use the Host header, many websites are now learning the ropes and will determine whether a request is legitimate or not by the IP attribution. This is where proxy IPs come in handy! For example, usingipipgoThe residential proxy IP, together with the Host header setting, can realize the double camouflage effect:

curl -x http://user:pass@proxy.ipipgo.cc:8080 -H "Host: www.target.com" http://1.2.3.4

Here 1.2.3.4 is the real IP of the target server, but after relaying it through the proxy, the other server will think you are from thewww.target.comDomain over proper request.

Third, the hand to teach you to tune cURL

Here's a common pitfall for newbies:Difference between -x parameter and -proxy. Let's use the table to compare:

Give an example with authentication (remember to replace it with your own ipipgo account):

curl --proxy http://vip_user:2024pwd@gateway.ipipgo.net:3128
-H "Host: api.important-site.com"
http://45.76.118.92/api/data

Fourth, common rollover scene rescue guide

Q1：Why is it still 403 after setting the Host header?
A: 80% of the proxy IP was recognized, it is recommended to change to ipipgo's dynamic residential IP, their IP pool is updated frequently, not easy to be marked.

Q2: What should I do if the connection to the agent always times out?
A: First check the proxy address port right, if no problem, may be the network environment restrictions. Use ipipgo'sRandom port assignmentfeature that effectively bypasses port blocking.

Q3: What if I need to keep a long connection?
A: Add a cURL to the-H "Connection: keep-alive"header, it is also recommended to use ipipgo's static residential proxy, the same IP can maintain the connection for a longer period of time.

V. Why did you choose ipipgo as a teammate?

Using a regular proxy is like diving in a raincoat - sooner or later you're going to get caught. ipipgo has three axes that are particularly well suited to this scenario:

1. inclusiveReal Residential IPThe geo-location camouflage
2. Supports HTTP/HTTPS/SOCKS5 protocols, you can play any way you want!
3. exclusivityrequest header obfuscation techniqueI've got fingerprint camouflage down to my teeth.

As a final nag, remember to use this command to check if it's taking effect after setting it up:

curl -x http://proxy.ipipgo.cc:8080 -I http://目标IP -H "Host: your domain name"

If you see a 200 status code, it means the disguise is successful! If you still can't get it to work, go directly to ipipgo's website and ask for theirs!7×24 hours technical support, much better than tossing yourself.