# Connect mode (ncat is client) | default port is 31337

ncat <host> [<port>]

# Listen mode (ncat is server) | default port is 31337

ncat -l [<host>] [<port>]

# Transfer file (closes after one transfer)

ncat -l [<host>] [<port>] < file

# Transfer file (stays open for multiple transfers)

ncat -l --keep-open [<host>] [<port>] < file

# Receive file

ncat [<host>] [<port>] > file

# Brokering | allows for multiple clients to connect

ncat -l --broker [<host>] [<port>]

# Listen with SSL | many options, use ncat --help for full list

ncat -l --ssl [<host>] [<port>]

# Access control

ncat -l --allow <ip>

ncat -l --deny <ip>

# Proxying

ncat --proxy <proxyhost>[:<proxyport>] --proxy-type {http | socks4} <host>[<port>]

# Chat server | can use brokering for multi-user chat

ncat -l --chat [<host>] [<port>]