havn

Fast configurable port scanner with reasonable defaults

TLDR

Scan default ports on a host

$ havn [host]

Scan a specific port range

$ havn -p [1-1024] [host]

Scan specific ports

$ havn -p [80,443,8080] [host]

Scan with increased retry count

$ havn -r [3] [host]

Scan all ports

$ havn -p [1-65535] [host]

SYNOPSIS

havn [-p ports] [-r retries] [-t timeout] host

havn is a lightweight, self-contained port scanning application written in Rust. It uses asynchronous Tokio multithreading to deliver fast and reliable results with a binary size under 1MB. It supports both IPv4 and IPv6 scanning and runs on Linux (including ARM), macOS, and Windows.
havn comes with sensible defaults for quick scanning while allowing customization of port ranges, timeouts, and retry counts for more thorough scans.

PARAMETERS

-p PORTS

Port or port range to scan (e.g. 80, 1-1024, 80,443,8080)

-r RETRIES

Number of retries for each port

-t TIMEOUT

Timeout in milliseconds per port

-h, --help

Print help

-V, --version

Print version

CAVEATS

Scanning ports on systems you do not own or have authorization to test may be illegal. Firewalls and intrusion detection systems may block or rate-limit scan attempts. Very large port ranges with short timeouts may produce false negatives.

HISTORY

havn was created by Jack Wills (mrjackwills) and is written in Rust. The name is Danish for "port" (as in harbor). It was designed as a minimal, fast alternative to more complex scanning tools.