An innovative and alternative way to find real IP addresses without using CDN

In fact, this idea comes from the rebound of nc, And the trojan connects to bypass the firewall ....

... When we directly access a cdn domain name, we must first pass through the cdn layer... what if we ask the server to connect to us ?? Can't we get the real IP address of the server quickly ??

How can I ask the server to contact us ???

.. I first thought of the email. Some servers bring sendmail... locally and will send an email to us after registration... Okay .. Open the source code of the email .. You can see the real Ip address of the server... Some large Internet websites have their own Mailserver... should they also be in a CIDR Block ?? That CIDR Block opens 80 one by one... Haha ..

If the recipient uses a public smtp mail server .. Www.2cto.com is not a bird... This article provides an idea...

In addition to mail... What else can we allow the server to actively connect to us ??? In fact, a push function is added to HTML5 .. That is to say, the server actively sends messages to the browser... This is because the website cannot be found .. So it's just an idea ..

Author: Brother cricket