rustscan

rustscan -a <target> -- -sV -sC

Fast port scanner in Rust that discovers open ports and runs nmap for fingerprinting.

When you want masscan speed but also nmap precision for version detection. Rustscan performs a fast SYN scan of the specified ports and then runs nmap against the open ones. It is ideal for initial scans on domains where time is critical.

In environments with firewalls that respond to all ports (host up but filtered), rustscan can waste time. Also if the client demands total stealth, because the nmap part generates more traffic.