centos7 iptables無(wú)法保存轉(zhuǎn)發(fā)規(guī)則，重啟就沒(méi)了

問(wèn)題一：明明安裝了IPtable，查詢的時(shí)候確提示沒(méi)安裝
問(wèn)題二：百度了下有的說(shuō)還要安裝iptable-service，如果不安如何讓IPtable重啟后保存的規(guī)則還在？
不是內(nèi)行的問(wèn)的問(wèn)題也外行請(qǐng)見諒！

[root@VM_88_10_centos ~]# systemctl status iptables Unit
Unit iptables.service could not be found.

[root@VM_88_10_centos ~]# yum install iptables
Loaded plugins: fastestmirror, langpacks Loading mirror speeds from cached hostfile
Package iptables-1.4.21-24.1.el7_5.x86_64 already installed and latest version Nothing to do

但是 iptables -t nat -L 命令又可以用

[root@VM_88_10_centos ~]# iptables -t nat -L
Chain PREROUTING (policy
ACCEPT) target prot opt source destination

Chain INPUT (policy ACCEPT) target prot opt source
destination

Chain OUTPUT (policy ACCEPT) target prot opt source
destination

Chain POSTROUTING (policy ACCEPT) target prot opt source
destination

然后保存轉(zhuǎn)發(fā)規(guī)則

[root@VM_88_10_centos ~]# iptables -t nat -A POSTROUTING -s 192.168.0.0/24 -o eth0 -j MASQUERADE

保存完查詢保存正常

[root@VM_88_10_centos ~]# iptables -t nat -L
Chain PREROUTING (policy ACCEPT) target
protopt source destination

Chain INPUT (policy ACCEPT) target prot opt source
destination

Chain OUTPUT (policy ACCEPT) target prot opt source
destination

Chain POSTROUTING (policy ACCEPT) target prot opt source
destination MASQUERADE all -- 192.168.0.0/24
anywhere

重啟下在查詢就沒(méi)了

[root@VM_88_10_centos ~]# reboot [root@VM_88_10_centos ~]# iptables -t
nat -L

Chain PREROUTING (policy ACCEPT) target prot opt source
destination

Chain INPUT (policy ACCEPT) target prot opt source
destination

Chain OUTPUT (policy ACCEPT) target prot opt source
destination