Connecting via any other terminal prompt will send any data typed to netcat listening port as shown in Figure 1. To listen connections on port (say 9999), type “nc - l -p 7777” as shown in Figure 1. To connect to any remote web server system (port 80) to grab the banner using TCP connection, just type “nc targetIPaddress 80” and identify what web serving software the victim is running as: nc 80
Z: Zero-I/O mode port numbers can be individual or ranges: lo-hi hyphens in port names must be backslash escaped (e.g. W secs: Timeout for connects and final net reads Q secs: Quit after EOF on stdin and delay of secs I secs: Delay interval for lines sent, ports scanned G gateway: Source-routing hop point, up to 8 Type “nc –h” in kali VM as: nc –hĬ shell commands: As `-e' use /bin/sh to exec Į filename: Program to exec after connect It can be used: 1) as a port scanning tool like nmap 2) for port forwarding 3) for proxying 4) as simple web server, and 5) for leaving an open backdoor for the hacker etc. Netcat, the network analysis tool is referred as “Swiss Army Knife of Hacking Tools” in the hacker’s community due to its multiple feature support.
