How to Install Telnet on RHEL

There are two binaries we need to install, one is client and another is server as given below.
 

[root@localhost ]# rpm -qa | grep telnet
telnet-0.17-73.el8.ppc64le
telnet-server-0.17-73.el8.ppc64le
[root@localhost ]# 

telnet-0.17-73.el8.ppc64le is a telnet client rpm package and telnet-server-0.17-73.el8.ppc64le is a telnet server package for ppc64 Little Endian for x86 version it will be ending with x86_64.

Install Telnet Packages

# yes | yum install telnet telnet-server

Installed:

  telnet-1:0.17-73.el8.ppc64le
  telnet-server-1:0.17-73.el8.ppc64le         

Complete!
 

Configuring Telnet Server

After successful installation if you try to telnet the machine you will notice the below error

# telnet localhost
Trying 127.0.0.1...
telnet: connect to address localhost: No route to host

Configure the Firewall and Restart the Telnet Server

Add the service into the firewall for accepting the request from the outside client and start the telnet.socket service.

[root@localhost ~]# firewall-cmd --add-service=telnet --zone=public --permanent
success
[root@localhost ~]# systemctl start telnet.socket
[root@localhost ~]# 

Telnet Status Check

Check the status of telnet using below command 

[root@localhost ~]#  systemctl status telnet.socket
● telnet.socket - Telnet Server Activation Socket
   Loaded: loaded (/usr/lib/systemd/system/telnet.socket; enabled; vendor preset: disabled)
   Active: active (listening) since Mon 2020-03-28 04:18:22 CDT; 3s ago
     Docs: man:telnetd(8)
   Listen: [::]:23 (Stream)
 Accepted: 1; Connected: 1;
   CGroup: /system.slice/telnet.socket

Mar 28 04:18:22 localhost systemd[1]: Listening on Telnet Server Activation Socket.
[root@localhost ~]#