How to solve SSH cannot connect CentOS6.5

How to solve the problem that SSH cannot connect to CentOS6.5?

1. Confirm that the port connected to the switch is normal. If you want to check, try changing a few more ports.

2. Confirm that there is no problem with the network. .

3. Close all selinux iptables services

4. Check whether the machine is listening on port 22 and whether the ssh service is enabled. Command: netstat -na and service sshd status

Here I want to tell you that the firewall can be temporarily closed or permanently closed

(1) It will take effect after restarting

开启： chkconfig iptables on
关闭： chkconfig iptables off

(2) Effective immediately, invalid after restart

开启： service iptables start
关闭： service iptables stop

Related reference:centOS tutorial

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