Move RDP away from default port 3389 to a random high-numbered port to reduce visibility against automated internet scanners.

: A brute-forcing tool specifically for RDP, SSH, and VNC.

MFA is the single most effective defense against credential-based attacks. Even if an attacker uses a tool to guess the correct RDP password, they will be blocked without the secondary verification code (from an app, token, or SMS). 3. Place RDP Behind a VPN or Gateway

Because tools like NLBrute 1.2 are actively used by threat actors to deploy ransomware, it is vital to secure your own remote access: SamSam Ransomware Campaigns - Sophos

NLBrute 12 utilizes multi-threading to assault dozens of servers simultaneously, guessing credentials at rapid speeds.

A powerful post-exploitation tool that can be used to test RDP authentication across a domain environment without needing malicious payloads.

Use firewall rules to restrict RDP access to specific IP addresses. Ethical Use and Security Auditing