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.
The most famous PHP reverse shell is the PentestMonkey script . It is robust and handles various edge cases. Download the php-reverse-shell.php file.
Accessing ://yoursite.com will return the current user of the web server. Common Obstacles and Troubleshooting reverse shell php install
If you have a way to execute command-line PHP but can't upload a full file, you can use a one-liner:
Edit the $ip and $port variables inside the script to match your machine’s IP and your Netcat port. In a typical connection, you (the client) connect
If you are a developer, finding a PHP reverse shell on your server is a sign of a major compromise. To prevent this:
Web servers often kill PHP processes that run too long. You may need to "upgrade" your shell to a more stable environment (like Python or Socat) once you have initial access. Security Warning & Mitigation You upload or execute a PHP script on the target server
Never allow users to upload .php files. Use a whitelist of allowed extensions (e.g., .jpg , .pdf ).
A Web Application Firewall can often detect the signature of common reverse shell scripts.
Upload the file to the target server’s web directory (e.g., via a file upload form or FTP).
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