Port scanning tool written in Go that allows you to enumerate valid
ports for hosts in a fast and reliable manner. It is a really simple
tool that does fast SYN/CONNECT/UDP scans on the host/list of hosts
and lists all ports that return a reply.

Features
  - Fast And Simple SYN/CONNECT/UDP probe based scanning
  - Optimized for ease of use and lightweight on resources
  - DNS Port scan
  - Automatic IP Deduplication for DNS port scan
  - IPv4/IPv6 Port scan (experimental)
  - Passive Port enumeration using Shodan Internetdb
  - Host Discovery scan (experimental)
  - NMAP integration for service discovery
  - Multiple input support - STDIN/HOST/IP/CIDR/ASN
  - Multiple output format support - JSON/TXT/STDOUT
