How to Use Netcat port 23

How to Use Netcat port 23

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Far from Telnet As a simple client network program, Netcat differs from Telnet in that it doesn't require authentication and doesn't require logon information or other session-negotiation information. When you connect to a Web server or other proprietary network application, Netcat by itself provides a simple, clean connection. When you connect to a Telnet daemon, the server requires the extra logon information, and you must use Netcat with the -t flag to establish the connection. For example, the command

nc -t 192.168.0.2 23 instructs Netcat to attempt a connection on TCP port 23 to a Telnet server.

You use a similar command syntax to open a connection to any network application running on a remote machine. For example, to connect to a Web server at 192.168.0.3, simply type

nc 192.168.0.3 80 Netcat connects to TCP port 80 (the standard HTTP port) and waits for a command. If you run Netcat without redirecting a text file as stdin or if you call the utility from a script, Netcat runs in interactive mode. For example, after you run Netcat to establish a connection to a Web server, you can issue a GET statement followed by a forward slash to access the default home page:

GET /