A is a script that, when executed on a server, initiates a connection from the server back to a listener on a remote machine. This allows an administrator or security researcher to gain interactive shell access (like terminal access) to the server, even if it is sitting behind a firewall.
While this technique is often associated with exploitation, understanding how to "install" and use one is a critical skill for ethical hackers, penetration testers, and developers who need to secure their environments. How a PHP Reverse Shell Works reverse shell php install
The server connects out to your machine. Since most firewalls allow outgoing traffic, the connection is established, granting you control. Prerequisites: Setting Up Your Listener A is a script that, when executed on
Many hardened servers disable PHP functions like exec() , shell_exec() , system() , and passthru() via the php.ini file. If these are disabled, the shell will not work. How a PHP Reverse Shell Works The server
This information is for educational purposes and authorized security testing only. Accessing systems without permission is illegal.
In a typical connection, you (the client) connect to the server. However, firewalls usually block incoming connections on non-standard ports. A flips this logic: You set up a "listener" on your machine. You upload or execute a PHP script on the target server.