nc.md

nc

nc, ncat, netcat

client

# tcp example.com:8080
nc example.com 8080

# udp example.com:8080
nc -u example.com 8080

server

# bind and listen
nc -l 0.0.0.0 8080

# keep open for multiple connections
nc -lk 0.0.0.0 8080

# bind to unix socket
nc -lU /var/run/example-socket

options

• -4: Use IPv4 only
• -6: Use IPv6 only
• -l: bind and listen for incoming connections
• -k: with listen, keep open
• -p <port>: set the source port
• -s <ip>: set the source ip
• --broker: with listen, send all input to all connected clients