Curl Host Header Settings: Customizing Host Headers Tutorial

Hands on with curl to play with Host header

Many old iron doing data collection have encountered this situation: obviously used a proxy IP, the target site or recognize abnormal traffic. This time is likely to be planted in theHost header leakageThis is the pit. Today we'll break it down and talk about how to perfectly disguise a request by using a proxy IP with a customized Host header.

What's a Host head anyway?

Simply put, this product is like a courier bill on the address label. For example, you order in a East (assuming that the proxy IP), but the courier bill written on the "spelling XiyuXi warehouse", which can not wear gangs. curl default will bring the real request address Host header, which exposes the fact that you are using the proxy.

 Typical rollover site (don't copy this directly!)
curl https://代理IP --header "Host: www.target.com"

Four steps to correct posture

Recommended hereDynamic Residential Proxy for ipipgoThe IP pool is ridiculously large, and I've personally tested that I haven't bumped any IPs with 50 threads open at the same time.Specific operations:

curl -x http://user:pass@gateway.ipipgo.io:8080
--connect-to ::www.target.com
-H "Host: www.target.com"
https://目标网站

take note of-connect-to parameterThis tawdry operation, can bypass DNS resolution directly specify the target, with Host header edible better. The gateway address used here is ipipgo, different packages may not be the same port, remember to check the background.

A practical guide to avoiding the pit

Recently, I encountered a strange problem when I helped a customer to do e-commerce price comparison: I added the Host header and returned 404 instead.SSL certificate does not matchThe solution is twofold:

 Option 1: Turn off certificate validation (suitable for test environments)
curl -k -x ip ipgo proxy address...

 Option 2: Force SNI specification (recommended for production environments)
curl --resolve www.target.com:443:代理IP...

Here's a shout out to ipipgo'sIntelligent Routingfeature that automatically matches the SSL certificates of target sites, basically eliminating the need to manually toss these.

question-and-answer session

Q: Do I still need to set up a Host header when I use the ipipgo proxy?
A: His advanced package comes with Host header camouflage, but customized settings can more accurately match business needs

Q: Why does it return 403 Forbidden?
A: eighty percent of the IP was the target station pulled black, hurry to change ipipgoExclusive Enterprise AgentThe package with automatic IP rotation

Q: Should I change the User-Agent at the same time?
A: It is necessary! Recommended to be used with a randomized UA library, ipipgo has a ready-made UA generator in the backend

Advanced Player Tips

When you encounter a site with particularly strict anti-climbing, you can try theDual Host HeaderPlaying method. Start by stuffing two Hosts in the request header:

-H "Host: www.target.com"
-H "X-Forwarded-Host: www.fake.com"

In conjunction with ipipgo'srequest header obfuscationfunction that can fool the 90% anti-climbing mechanism. But pay attention to the target site's HEADER order detection, this has to be specific site-specific analysis.

Finally, don't waste your time on free proxies. The last time I tested an open source proxy pool, 8 out of 10 IPs were blacklisted, so I might as well just go to ipipgo.pay-per-use packageAt least each request is guaranteed to eat fresh IP. what you don't understand can be directly knocked on their technical customer service, the response speed is faster than a treasure seller.