To test zabbix today, you need to use the telnet service, and find out how to download and install the telnet service under Centos7, hereby organize the records!
1. Download and install telnet through yum
yum -y install xinetd telnet telnet-server
Second, the configuration file settings
2.1 Set to allow root account login
vi /etc/securetty
Add the following two lines to the end of the document, :wq! save and exit
pts/0
pts/1
2.2 Set firewall, add firewall port
vi /etc/sysconfig/iptables
-A INPUT -p tcp -m state --state NEW -m tcp --dport 23 -j ACCEPT
Restart the firewall service for the configuration to take effect
systemctl restart iptables
systemctl disable firewalld
systemctl stop firewalld
3. Register telnet service
systemctl enable telnet.socket
systemctl start telnet.socket
systemctl enable xinetd
systemctl start xinetd