What is a Denial-of-Service (DoS) Attack?
A Denial-of-Service attack occurs when an attacker makes multiple requests to a server, overwhelming it with traffic in order to exhaust its resources and prevent legitimate users from accessing the system.
HTTP Requests and Nginx
Nginx is a popular web server software that can handle HTTP requests. However, if an attacker is using a proxy or intermediate server to relay requests, they may be able to inject malicious traffic.
Man-in-the-Middle (MitM) Attacks
A Man-in-the-Middle attack involves intercepting and modifying HTTP requests between a client and server. This can allow an attacker to steal sensitive information or inject malware.
Solving the Issue
To prevent DoS attacks, use HTTPS (SSL/TLS) instead of HTTP. Additionally, ensure that Nginx is configured properly and that any proxies or intermediate servers are not being used.
To troubleshoot issues, check your server logs for unusual traffic patterns and consider using a security tool like Wireshark to inspect network traffic.