CentOS 7.0默認使用的是firewall作為防火牆，之前版本是使用iptables。
所以在CentOS 7執行下面命令是無法查看防火牆狀態的。
[root@localhost ~]# service iptables status
Redirecting to /bin/systemctl status iptables.service
Unit iptables.service could not be found.
1
2
3
4
查看防火牆是否關閉
firewall-cmd –state
[root@localhost ~]# firewall-cmd --state
not running
[root@localhost ~]#
1
2
3
開啟防火牆
[root@localhost ~]# systemctl start firewalld
[root@localhost ~]# firewall-cmd --state
running
[root@localhost ~]#
1
2
3
4
5
關閉防火牆
[root@localhost ~]# systemctl stop firewalld
[root@localhost ~]# firewall-cmd --state
not running
[root@localhost ~]#
1
2
3
4
5
禁止firewall開機啟動
[root@localhost ~]# systemctl disable firewalld
Removed symlink /etc/systemd/system/multi-user.target.wants/firewalld.service.
Removed symlink /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.
1
2
3
這樣設置的話，下次重啟開機的時候就會禁止firewall的啟動，即關閉狀態。
設置firewall開機啟動
[root@localhost ~]# systemctl enable firewalld
Created symlink from /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service to /usr/lib/systemd/system/firewalld.service.
Created symlink from /etc/systemd/system/multi-user.target.wants/firewalld.service to /usr/lib/systemd/system/firewalld.service.
1
2
3
4
這樣設置之后，開機就會自動開啟防火牆。
顯示防火牆應用列表
[root@localhost ~]# firewall-cmd --list-all
public (active)
target: default
icmp-block-inversion: no
interfaces: ens33
sources:
services: ssh dhcpv6-client
ports:
protocols:
masquerade: no
forward-ports:
source-ports:
icmp-blocks:
rich rules:
[root@localhost ~]# firewall-cmd --add-service=ftp
success
[root@localhost ~]# firewall-cmd --list-all
public (active)
target: default
icmp-block-inversion: no
interfaces: ens33
sources:
services: ssh dhcpv6-client ftp
ports:
protocols:
masquerade: no
forward-ports:
source-ports:
icmp-blocks:
rich rules:
[root@localhost ~]#
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
使用firewall-cmd --add-service=ftp 之后，列表顯示出多了一個ftp服務
---------------------
作者：黃寶康
來源：CSDN
原文：https://blog.csdn.net/huangbaokang/article/details/79923382
版權聲明：本文為博主原創文章，轉載請附上博文鏈接！