What are the potential security risks of allowing external access to a database from another server?

Allowing external access to a database from another server can expose the database to unauthorized access, data breaches, and potential security vulnerabilities. To mitigate these risks, it is important to implement strict access controls, encryption, and authentication mechanisms to ensure that only authorized users can access the database. 

// Example of implementing access controls in PHP
$allowed_servers = ['192.168.1.100', '10.0.0.1'];
$remote_server_ip = $_SERVER['REMOTE_ADDR'];

if (!in_array($remote_server_ip, $allowed_servers)) {
    die("Access denied. Unauthorized server.");
}

// Proceed with database connection and queries

Keywords

SQL injection cross-site scripting data leakage unauthorized access firewall configuration

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