netcat (NC) listen for open ports
The nc (or netcat) utility is used for just about anything under the sun involving TCP or UDP. It can open TCP connections, send UDP packets, listen on arbitrary TCP…
tcpdump – dump traffic on a network
NAME tcpdump - dump traffic on a network DESCRIPTION Tcpdump prints out a description of the contents of packets on a network interface that match the boolean expression; the description…
Telnet Connection Testing with curl
Thanks (again) to Rich Trouton for showing us a way of testing connectivity and uptime You can use curl to create a telnet connection using a command similar to the…