linux系統(CentOS7)網絡連接排查

1.首先查看防火牆: (1)設置開機啓用防火牆:systemctl enable firewalld.service (2)設置開機禁用防火牆:systemctl disable firewalld.service (3)啓動防火牆:systemctl start firewalld (4)關閉防火牆:systemctl stop firewalld (5)檢查防火牆狀態:systemctl st
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