How to check the firewall connections in unix?...

How to check the firewall connections in unix?...

Command:

telnet hostname portnumber

About telnet

The telnet program is a user interface to the TELNET protocol.

Description

The telnet command is used for interactive communication with another host using the TELNET protocol. It begins in command mode, where it prints a telnet command prompt ("telnet>").
If telnet is invoked with a host argument, it performs an open command implicitly (see the Commands section below for details).

 

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