Using username "root".
Authenticating with public key "incognito-putty"
Passphrase for key "incognito-putty":
Last failed login: Tue Feb  9 13:50:05 EST 2016 from 185.130.5.179 on ssh:notty
There were 633 failed login attempts since the last successful login.
Last login: Tue Feb  9 06:43:44 2016 from 78-82-83-145.tn.glocalnet.net
[root@incognito ~]# yum install telnet
Loaded plugins: fastestmirror
base                                                     | 3.6 kB     00:00
epel/x86_64/metalink                                     |  28 kB     00:00
epel                                                     | 4.3 kB     00:00
extras                                                   | 3.4 kB     00:00
remi                                                     | 2.9 kB     00:00
remi-php56                                               | 2.9 kB     00:00
remi-safe                                                | 2.9 kB     00:00
updates                                                  | 3.4 kB     00:00
(1/6): epel/x86_64/updateinfo                              | 479 kB   00:01
(2/6): remi-php56/primary_db                               | 189 kB   00:00
(3/6): remi/primary_db                                     | 1.2 MB   00:00
(4/6): remi-safe/primary_db                                | 352 kB   00:00
(5/6): updates/7/x86_64/primary_db                         | 2.3 MB   00:00
(6/6): epel/x86_64/primary_db                              | 3.8 MB   00:01
Loading mirror speeds from cached hostfile
 * base: centos.hyve.com
 * epel: www.mirrorservice.org
 * extras: centos.serverspace.co.uk
 * remi: remi.check-update.co.uk
 * remi-php56: remi.check-update.co.uk
 * remi-safe: remi.check-update.co.uk
 * updates: centos.serverspace.co.uk
Resolving Dependencies
--> Running transaction check
---> Package telnet.x86_64 1:0.17-59.el7 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

================================================================================
 Package          Arch             Version                 Repository      Size
================================================================================
Installing:
 telnet           x86_64           1:0.17-59.el7           base            63 k

Transaction Summary
================================================================================
Install  1 Package

Total download size: 63 k
Installed size: 113 k
Is this ok [y/d/N]: y
Downloading packages:
telnet-0.17-59.el7.x86_64.rpm                              |  63 kB   00:00
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : 1:telnet-0.17-59.el7.x86_64                                  1/1
  Verifying  : 1:telnet-0.17-59.el7.x86_64                                  1/1

Installed:
  telnet.x86_64 1:0.17-59.el7

Complete!
[root@incognito ~]# telnet smtp.gmail.com 25
Trying 64.233.166.108...
Connected to smtp.gmail.com.
Escape character is '^]'.
220 smtp.gmail.com ESMTP w8sm36335234wjx.21 - gsmtp
^C^C^C^C^X^Z^C