[研究] sshd 安裝架設 (CentOS 8.2)

[研究] sshd 安裝架設 (CentOS 8.2)

2020-09-23

sshd = Secure Shell (SSH) Daemon Service

顯示作業系統版本

$ cat /etc/redhat-release

CentOS Linux release 8.2.2004

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安裝 ssh daemon service

$ sudo yum -y install openssh-server

或

$ sudo dnf -y install openssh-server

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顯示狀態

$ sudo systemctl status sshd

立刻啟動、停用、重新啟動

$ sudo systemctl start sshd

$ sudo systemctl stop sshd

$ sudo systemctl restart sshd

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設定開啟動是否自動啟用 sshd

$ sudo systemctl enable sshd

$ sudo systemctl disable sshd

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防火牆開放 port 22

$ sudo yum install firewalld

$ sudo systemctl enable firewalld

$ sudo firewall-cmd --zone=public --permanent --add-service=ssh

$ sudo firewall-cmd --reload

檢查狀態

$ sudo firewall-cmd --state

$ firewall-cmd --get-active-zones

$ sudo firewall-cmd --list-all

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設定檔案

/etc/ssh/sshd_config 

若修改，要重新啟動 sshd

$ sudo systemctl reload sshd

(完)

相關

firewalld

https://firewalld.org/documentation/man-pages/firewall-cmd.html

https://firewalld.org/documentation/utilities/firewall-cmd.html