Linux_Installing telnet packages

2018.04.03 14:06

Admin 조회 수:33

 

Installing telnet packages

 

If the 2 required packages are not installed, install it using yum.

 

# yum install telnet-server telnet

 

Configuring/enabling telnet

 

1. Add the service to firewalld.
The built in firewalld blocks Telnet port 23 by default because the protocol is not considered secure. Please make sure that the port is open or if a non-default port is being used, that the port associated with Telnet is open for Telnet traffic to pass through.

 

# firewall-cmd --add-service=telnet --zone=public

 

2. Add the service to selinux.
You will have to also add the service to SELinux. This is required only in the case where SELinux is enabled on the system.

 

# semanage port -a -t telnetd_port_t -p tcp

 

3. Enable and start the telnet service.
Start the service using the systemctl command.

 

# systemctl start telnet.socket

 

Enable the telnet service to start at boot.

 

# systemctl enable telnet.socket

 

4. Verify
Once you are done with the configuration, verify if the telnet to a server works.

 

# telnet geeklab02

 

Trying 10.10.10.10...

 

Connected to 10.10.10.10.

 

Escape character is '^]'.

 

 

 

Kernel 3.10.0-327.el7.x86_64 on an x86_64

 

geeklab02 login: testuser

 

Password:

 

Last login: Sat Jan 23 18:19:43 from geeklab

 

 

 

[testuser@geeklab02 ~]$ hostname

 

geeklab02

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