Install Telnet on Centos or Redhat RHEL, How to Install Telnet on Centos or Redhat RHEL, Step by Step Install Telnet on Centos or Redhat RHEL. How to configure Telnet Server in RHEL6, Configure telnet client in RHEL6, How configure Telnet client on Window 7. Poor telnet, it used to be the cool kid on the block. It was the program all sysadmins turned to when they needed to connect to a remote server. Telnet just wasn't that good at keeping a secret—all communication went over plain text—so administrators started switching to SSH for encrypted remote shell sessions. Of course, along with the switch came a huge stigma against administrators who still used telnet. Eventually, telnet became an outcast—the program you used if you were an out-of-touch old-timer who didn't care about security. I for one think telnet isn't all bad. Sure, it can't keep a secret, but it still can do a lot of useful things around the server room. Really, telnet just provides you a convenient way to connect to a network port and send commands. Telnet can work well to diagnose problems with one of the many services out there that still accept plain-text commands in their protocol. In fact, it's one of my go-to command-line programs when I'm troubleshooting. In this column, I'm going to give telnet a second chance and describe how to use it to perform some common troubleshooting tasks. Test Remote Ports There are many different ways to test whether a network port is listening on a system, including GUI port scanners, Nmap and nc.
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March 2018
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