Shulou(Shulou.com)06/02 Report--

Background:

Idle is also idle. Rebrush the windows system, install a virtual machine (192.168.1.108), run a CentOS-7-x86_64-Minimal-1511 system environment (configure static IP192.168.1.105), and then install your own docker, running around. Unexpectedly, I was seen by the elder brother at the next table, so my machine was robbed ~ ~ then I will install another one, thinking that it is only a matter of minutes. But it is always impossible to ssh 192.168.1.104.

Process:

So check the network card configuration, firewall, and the network can also ping, the intranet and Baidu are no problem.

Then I passed the machine ssh 104. It suddenly dawned on me after reporting a mistake. It's a port conflict.

Then change the port. Success.

The methods are as follows:

Reference link: https://www.cnblogs.com/rwxwsblog/p/5756894.html

1. Modify / etc/ssh/sshd_config

2. Modify firewall configuration

Add to the firewall:

Firewall-cmd-- zone=public-- add-port=20002/tcp-- permanent (permanent saves the configuration, otherwise this modification is invalid after the next restart)

Restart:

Firewall-cmd-reload

Check whether the port is added successfully. If the port is added successfully, yes will be displayed, otherwise no

Firewall-cmd-zone=public-query-port=20002/tcp

3. Modify SELinux

Semanage port-l | grep ssh

Add port 20002 to SELinux

Semanage port-a-t ssh_port_t-p tcp 20002

Then confirm whether to add it or not

Semanage port-l | grep ssh

Restart ssh

Systemctl restart sshd.service

Both the semanage and firewalld-cmd commands need to be installed

Install semanage:yum-y install policycoreutils-python.x86_64

Install firewalld-cmd:yum install firewalld

Log in again through xshell. Success.

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